- 17:56:00
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Students of Bayero University, Kano (BUK) on Thursday in Kano gave the Federal Government one week ultimatum to meet all the demands of Academic Staff Union of Universities (ASUU) or face wrath of Nigerian students.
The students, who staged a peaceful protest under the auspices of a Student Union Government (SUG), BUK chapter, urged the Federal Government to respect and implement the 2009 ASUU/FG agreement, insisting that the two parties should come to the negotiation table and settle their scores for the interest of Nigerian students.
Addressing the crowd at BUK gate, the university’s SUG President, Comrade Sani Ibrahim, said they were forced to stage the protest, “because we are tired of staying at home. Our mates in other countries are in school; why should the case of Nigerian students be different.”
“As part of the struggle to fight for our right, I will like to salute our students for their patience while receiving the negative consequences of bad governance. We believe that the delay in resuming lectures in our universities is not only lamentable but also devastating. We believe even more strongly that now is the time to let our leaders know that enough is enough and we shall wake up and say no to injustice being meted out to Nigerian students.
“Similarly, we call on the Federal Government to respect the 2009 agreement reached between government and ASUU. We also call on the government to review the annual budget for the education sector from eight per cent to 26 per cent, so as to ensure adequate rehabilitation of infrastructures in our universities, including hostels, laboratories, potable water and constant supply of electricity.
“In the same vein, we are calling on ASUU to give government more opportunity to dialogue so as to quickly resolve the differences in the best interest of Nigerian students. We are giving ASUU and Federal Government one week to sort themselves out and resume lectures, otherwise, Nigerian students will look for other alternatives to fight for our right. Education is our right and no one should take it away from us,” Ibrahim noted.
The students, who staged a peaceful protest under the auspices of a Student Union Government (SUG), BUK chapter, urged the Federal Government to respect and implement the 2009 ASUU/FG agreement, insisting that the two parties should come to the negotiation table and settle their scores for the interest of Nigerian students.
Addressing the crowd at BUK gate, the university’s SUG President, Comrade Sani Ibrahim, said they were forced to stage the protest, “because we are tired of staying at home. Our mates in other countries are in school; why should the case of Nigerian students be different.”
“As part of the struggle to fight for our right, I will like to salute our students for their patience while receiving the negative consequences of bad governance. We believe that the delay in resuming lectures in our universities is not only lamentable but also devastating. We believe even more strongly that now is the time to let our leaders know that enough is enough and we shall wake up and say no to injustice being meted out to Nigerian students.
“Similarly, we call on the Federal Government to respect the 2009 agreement reached between government and ASUU. We also call on the government to review the annual budget for the education sector from eight per cent to 26 per cent, so as to ensure adequate rehabilitation of infrastructures in our universities, including hostels, laboratories, potable water and constant supply of electricity.
“In the same vein, we are calling on ASUU to give government more opportunity to dialogue so as to quickly resolve the differences in the best interest of Nigerian students. We are giving ASUU and Federal Government one week to sort themselves out and resume lectures, otherwise, Nigerian students will look for other alternatives to fight for our right. Education is our right and no one should take it away from us,” Ibrahim noted.
- 19:47:00
- 0 Comments
What’s the secret to your success?
It’s been challenging but I give the glory to God because He has been faithful. It’s not been easy trying to climb the ladder of success. You encounter all kinds of challenges. A lot of people will love you and a lot would hate you. But so far I give Glory to God; I thank God for being there. He has always been my strength. I always run to Him when I have challenges.
What’s been your most challenging role?
All the movies I have done are very challenging. Basically, I could say that movies like Warri Girl and Tough Wife were the most challenging.
Outside of acting, who is Ejiro?
Ejiro is just a normal girl from Delta State. I am the last from a family of seven. My parents are in Lagos.
What’s your assessment of Nollywood?
It has created jobs and provided food for many families. Nollywood has taking a lot of people to many places and opened a lot of doors. It has built many career men and women. Although, we still have some challenges here and there but we are doing our best.
Were you sexually harassed as an upcoming actress?
I didn’t set myself up to be sexually harassed. However, the issue of sexual harassment is in every organization not just Nollywood. It happens everywhere.
So, you are in a relationship now?
Yes, I am seeing my boyfriend.
What attracted you to him?
His composure and understanding makes him different. Generally, he is that kind of a man that understands the nature of my work. If I want to go anywhere, all he needs is for me to tell him where I am going to work.
You are not getting younger. When is he taking you down the aisle?
You will get the invite soon; I am old enough to get married and have children.
What kept you long from getting married?
What kept me long was that I had not found the right man.
Was it in Nollywood that you lost your virginity?
(Laughter) No comment bros, no comment. When did you lose your own?
What is your view about lesbianism in the industry?
I think it is demonic. I won’t say much about it because a lot of people are involved. The industry needs divine intervention so God can erase such people from the industry. It has eaten deep and it is affecting us. That’s why we need to seek the presence of God. Lesbianism is a sign of the end of time.
Have you been a victim before?
No, not really. I think it is when you give room for these things that they occur. I was in Abuja for a particular event when a lady asked me to sit on her laps. I was like ‘what, sit on your laps! For what?’ I left and got my own chair.
- 19:28:00
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Karim El Ahmadi's close-range finish levelled matters only for Edin Dzeko to head City back into the lead.
But Villa equalised through Leandro Bacuna's free-kick before snatching the three points when Andreas Weimann raced through and poked home late on.
The win was Villa's first at home this season and the second half performance will have given home fans plenty to be happy about - particularly the display of Dutch midfielder Bacuna.
The summer signing from FC Groningen provided the assist for Villa's first, while his equalising free-kick - his first Premier League goal - would have been difficult for any goalkeeper to keep out.
City had arrived at Villa Park looking to maintain the momentum built up from their impressive 4-1 defeat of Manchester United last weekend, a third successive home win in the Premier League.
But for all their dominance at the Etihad Stadium this season, they have been disappointing on the road.
- 18:48:00
- 0 Comments
The Ministry of Interior has vehemently denied the claims by several Nigerian job
seekers that stormed it premises to
protest the N1000 fee charge for application to get recruited to the Nigeria
Immigration Service (NIS), saying contrary to the belief, the fee per applicant,
covers the cost of scratch card to access the site.
The permanent secretary, who harped that the ministry did
not charge nor accept fee for jobs, advised those peddling such rumor to desist
from it, as it was capable of denting government's image.
She posited, "For the avoidance of doubt the Ministry
of Interior and the Nigeria Immigration Service, do not charge and will not
accept money for jobs, and anybody that demands and accepts money or bribes for
job will be appropriately sanctioned in line with extant regulations guiding discipline
in the service."
It would be recalled that some aggrieved youths, auspices of
the Nigeria Unemployed Youths Vanguard had, on Monday, protested what they
described as an exploitation by the Nigerian government
- 15:24:00
- 0 Comments
Paul Karason was born a fair-skinned, freckled boy with reddish blond hair. But later, he developed skin with a bluish tinge against his shock of white hair, the result of a rare medical syndrome known as argyria or silver poisoning from dietary supplements.
Karason died at the age of 62 this week after being treated for pneumonia at a Washington hospital after having suffered a heart attack. He'd also previously had a severe stroke, his estranged wife Jo Anna Karason told NBC's Today.
ABCNews.com interviewed Karason in 2008. At the time he lived in Oregon. He said the blue tinge had started more than a decade before that when he saw an ad in a new-age magazine promising health and rejuvenation through colloidal silver. He drank about 10 ounces a day of the home-brew that he dissolved in water.
Karason said he hadn't even realized his skin had turned a shade of blue until an old friend came to visit.
"And he looks at me and he says, 'What have you got on your face?' 'I don't have anything on my face!'" Karason said. "He says, 'Well, it looks like you've got camouflage makeup on or something.' And by golly, he came in and he was very fair-skinned, as I used to be. And that's when it hit me."
In those first months, he didn't notice a change in his skin color. But there were changes in his health.
"The acid reflux problem I'd been having just went away completely," he said. "I had arthritis in my shoulders so bad I couldn't pull a T-shirt off. And the next thing I knew, it was just gone."
As for whether it was the colloidal silver that had cured him, Karason said, "There's not the slightest doubt in my mind." As recently as the 1950s, colloidal silver was a common remedy for colds and allergies.
- 15:04:00
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According to what Punch Newspaper reported, on Aug. 12,
2012, CRIME DIGEST reported that popular singer, David Adeleke, aka Davido,
allegedly assaulted a taxi driver in Lagos and
that his publicist, Valerie Obaeze, claimed via an e-mail
that the singer knew nothing about the incident.
In a related development, Hashiru Azeez, the employer of the
taxi driver, whose name is Femi Ajibola, told CRIME DIGEST that Davido himself
said that the taxi driver was assaulted by his cousins. Azeez confirmed that he
gave a Toyota Corolla to Ajibola on hire purchase.
“I gave it out to him on hire purchase. When Ajibola
initially told me about this matter, I did not believe him. Later, I went to Beni’s
Apartment in company with Sgt. Nuru Umar, who is the Investigating Police
Officer, and we found out that he was right.
“We went to the DPO and he called Davido’s father after I
took time to explain who the boy was,” Azeez said.
Immediately after the story was published, the young woman
who was conveyed in the cab to see Davido allegedly threatened Ajibola at the
taxi park where he operates.
“I got a call from Ajibola that Susan allgedly went to the
park to threaten him. She said that if he was claiming that he lost N100,000
during the incident with Davido, she would pay the money. Then she asked if the
cab driver had forgotten that she lost her cell-phone, which was valued at
N175,000.
“She said that Ajibola would have to produce her phone
because he was the one that took them to the hotel in his cab. She added that
she would deal with him,” he said.
The car dealer said he had advised his employee to report
the matter at the nearest police station.
However, since the case had initially been reported at the
Bar Beach Police Station, Ajibola was directed to go and lodge his complaint
there.
Azeez said, “Ajibola went to Maroko Police Station, but he
was directed to the Bar Beach Police Station because he had already reported
the case there.”
Azeez said that a petition had been written on his behalf to
the Assistant Inspector-General of Police in charge of Zone 2 about the
incident. He stated that somehow, the Adelekes got wind of this and contacted
him for a meeting.
“A lawyer, Malachy Ukwamadu, wrote a petition on our behalf
to the AIG Zone 2. We had written the petition even before the publication.
Somehow, the Adeleke family got to know that we had written a petition and they
got someone to ask me to come with Ajibola to the Bar Beach Police Station.
They said they would bring Davido to the station. The boy had surrendered
himself and the police were ready to prosecute him. It was hard to believe, but
I was optimistic,” the car dealer said.
Azeez said he was advised not to honour the invitation by a
policeman who warned that the case might be tilted to the advantage of Davido.
“The policeman warned that there was an ulterior motive
behind the invitation. He said the moment that Ajibola stepped into the Bar
Beach Police Station, the case would change and turn against him.
“This prompted us to invite a lawyer to go to the station
instead of Ajibola. Ukwamadu was out of town. So, we invited Bar. Ademola
Olamide. While we waited for them to bring Davido, the IPO told the lawyer that
they wanted to negotiate.
“Olamide said that he thought they wanted to bring in Davido
and why was it that it was the police that wanted to negotiate. Should they not
be neutral?” Azeez said.
The lawyer insisted he would not talk to the police unless
they brought Davido to the station. The IPO then phoned somebody who spoke with
Olamide and agreed to meet him.
When meeting took place on Aug. 12, the lawyer informed
Azeez that the picture painted by Davido was different from what he had learnt
from the complainant.
Azeez said, “I was asked to come over to explain.
Fortunately, we had our witness. While the counsel was disputing what we said,
we called in the witness. He is a driver and he drove along with Ajibola; he
had some guys in his vehicle and I learnt that those girls brought those guys.
“When we brought in our witness, they calmed down. Davido
then said that he was not the one that assaulted Ajibola. He said that the guys
we were claiming were his bodyguards were actually his cousins. He said that it
was Bayo, one of his cousins, who beat up Ajibola.”
Suspecting a foul play somewhere, Azeez asked what business
Bayo had with Susan since she was Davido’s girlfriend.
“We told him that from his conversation, Susan was his
girlfriend and why would Bayo beat up Susan? At a point, they said that they
would like to compensate Ajibola and that they wanted to know how much Ajibola
made in a day.
“They said that they would pay two weeks’ earnings. I was
not there when they were discussing the money issue. I told my lawyer that
there was no basis for compensation since he denied assaulting Ajibola. I said
he should produce those who beat up Ajibola, that the police should do their
job and we would know what step to take from there,” he said.
Azeez told CRIME DIGEST that Ajibola’s car keys had not been
returned to him. He said that an agency that fights for the cause of the less
privileged had contacted him and was ready to help out in the matter.
“The agency champions the cause of the less privileged and
they are willing to assist us in seeking justice. Davido claims he was not the
one that assaulted the driver; but how did he get hold of the car keys before
handing it to his father and later, the DPO?
“Why would he take someone’s car keys and keep them? Up till
now, nobody has confirmed if Davido has written any statement regarding this
case. We still believe that he is above the law until he comes out to say his
own part of the story. If at all we agree to negotiate with him, he should
accept that he was wrong to have assaulted a man that is 16 years older than
him andapologise for his behaviour. Then we will know what to do from there,”
he said.
When CRIME DIGEST contacted Susan on the phone, a male voice
answered the call, claiming it was a wrong number. However, Obaeze, Davido’s
publicist, maintained that her client knew nothing about the incident.
In an e-mail to CRIME DIGEST, the publicist wrote, “Thanks
for your enquiry and effort to get our own side of the story, but our previous
statement (still) stands. Davido was neither aware of nor involved in any
incident involving the assault of a taxi driver or the illegal seizure of his
keys. He does not condone violence in any form and will not be commenting
further on this matter.”
The Police Public Relations Officer, Zone 2 Police Command,
Femi Balogun, confirmed that the case was being handled by his command. He said
that the AIG had ordered that Davido should be brought before him with the
Toyota Corolla used as taxi. He said they did not know where Davido is and he
would be picked up once they have information on his whereabouts.
- 13:43:00
- 0 Comments
Federal University of Technology, Minna (FUTMinna) - 190
> Kwara State Polytechnic, - 180
> University of Port Harcourt (UNIPORT) - 180 or 200 dependingon course
> Federal University of Technology Owerri (FUTO) - 180 UTME
> Kaduna State University (KASU) -180 UTME (first choice only)
> Lagos State Polytechnic (LASPOTECH) - 180
> University of Ibadan (UI) - 200 (Only Accept Students who Choosethem as First choice only)
> Lagos State University (LASU) - 200
> Michael Okpara University of Agriculture, Umudike (MOUAU) - 180
> Imo State University (IMSU), now Called EvanEnwerem University (EEU) - 180
> University of Benin (UNIBEN) - 200
> Anambra State University (ANSU) - No official figure probably 180
> Nnamdi Azikiwe University (NAU/UNIZIK) - 180 first choice only (no official proof yet)
> Enugu State University of Science & Technology - 180
> Federal University of Technology, Akure (FUTA) - 200
> Obafemi Awolowo University (OAU) - 200
> Adekunle Ajasin University - 200
> Tai Solarin University of Education (TASUED) - 180 (first choice only)
> University of Nigeria, Nsukka (UNN) - 200 (minimum UTME cut-off)
> Rivers State University of Science and Technology (RSUST) - 180 (1st choice only)
> University of Agriculture, Abeokuta (UNAAB) - 180 (minimum UTME cut-off)
> Delta State University, Abraka (DELSU) - 180 (minimum UTME cut-off)
> Abia State University, Uturu (ABSUU) - 180
> University of Ilorin, UNILORIN - 200 (240 for Medicine)
> University of Lagos (UNILAG) - 200
> Federal University of Technology FUT,Minna - 190
> Kwara State Poly -180
> University of Port Harcourt, UNIPORT - 200/180 depending oncourse
> Federal University of Technology Owerri, FUTO - 180 UTME cutoff.
> Kaduna State University, KASU - 180 UTME cutoff (first choice only)
> Lagos State Polytechnic, LASPOTECH - 180
> University of Ibadan, UI - 200 (First choice only)
> Lagos State University, LASU - 200
> Michael Okpara University of Agriculture, Umudike, MOUAU - 180
> University of Benin, UNIBEN - 200
> Niger Delta University - 180 Cutoff mark will vary depending on your chosen course.
> Osun State University (Uniosun) -200 (180 for Agriculture, Education and Arts i.e Humanities and Culture Faculty)
> University of Abuja - 180
- 21:54:00
- 0 Comments
For most brides and grooms, deciding what to wear on the Big Day is one of the most important parts of wedding planning. But one New Zealand couple didn’t have to shop for wedding outfits — because they got married in the Unclad.
Nick and Wendy Lowe were married at the Wellington Naturist Club on Saturday in a “clothing optional” wedding, reported local newspaper The Dominion Post. About half of the 120 guests were Unclad. Both clothed and Unclad photos were taken, and though guests were asked to dress for dinner, the dancing portion of the event wasclothing optional.
Nick encouraged Wendy to embrace the “naturism,” or nudist, lifestyle six years ago.
“It was one of the first things he said to me: ‘I’m a naturist, how do you feel about it?’ I knew at some point I’d have to at least try it,” Wendy said.
- 08:15:00
- 0 Comments
Federal University Akure. is now calling interested students or applicants that the
UNIVERSITY ADVANCED BASIC SCIENCE(UBAS) form for application is now ongoing
for 2013/2014 application. it is A-two year programme.
This Program is designed to preparestudents to be able to apply into 200L direct entry into undergraduate degree program which can be offered by Federal university Akure and other degree awarding institution in Nigeria and across the nation. These program will last for a period of two academic session with four semesters.
Advantages of the programme
During the programme you can apply for Advanced Level CambridgeExam (ICE)
You can also sit for Interim Joint Matriculation n Board(IJMB)
You can also use you certificate after graduation to apply for direct entry.
Methods Of Application
Interested candidates are to pay thesum of ten thousand naira(10,000) excluding bank charges on any bankthat is on e-transact platform.
Requirements for admission
Candidates should possess five Credit passes in WASC, NECO, GCE or NABTEB at not more than two sittings in relevant subjects from English Language, Mathematics, Physics, Chemistry, Biology/Agric. Science, Economics, and Geography depending on their proposed courseof study.
Admission are available in :
School of Agriculture and Agricultural Technology (SAAT)
School of Engineering and Engineering Technology (SEET)
School of Earth and Mineral Sciences (SEMS)
School of Environmental Technology (SET)
School of Management Technology (SMT)
School of Sciences (SOS
Qualifying test: the qualifying test iscomputer based and it will come up on 2nd August 2013
TIME: 9:00 am
VENUE: E-test center, Federal University Akure.
screening of successful candidates will be on August 12th, 2013 ad Lecture will start Monday
Monday 19th August 2013.
CLOSING DATE:
the application closing date will come up 22nd July 2013.
- 23:27:00
- 0 Comments
Have you ever wondered where our agricultural crops come from? And what were they like thousands of years ago, or hundreds of years ago? Our food crops today are in fact very different from the original wild plants from which they were derived.
About 10,000 years BC, people harvested their food from the natural biological diversity that surrounded them, and eventually domesticated crops and animals. During the process of domestication, people began to select better plant materials for propagation and animals for breeding, initially unwittingly, but ultimately with the intention of developing improved food crops and livestock. Over thousands of years farmers selected for desirable traits in crops, and thus improved the plants for agricultural purposes. Desirable traits included crop varieties (also known as cultivars , from " culti vated var ieties") with shortened growing seasons, increased resistance to diseases and pests, larger seeds and fruits, nutritional content, shelf life, and better adaptation to diverse ecological conditions under which crops were grown.
Over the centuries, agricultural technology developed a broad spectrum of options for food, feed, and fiber production. In many ways, technology reduces the amount of time we dedicate to basic activities like food production, and makes our lives easier and more enjoyable. Everyone is familiar with how transportation has changed over time to be more efficient and safer (Figure 1). Agriculture has also undergone tremendous changes, many of which have made food and fiber production more efficient and safer (Figure 1). For example in 1870, the total population of the USA was 38,558,371 and 53% of this population was involved in farming; in 2000, the total population was 275,000,000 and only 1.8% of the population was involved in farming. There are negative aspects to having so few members of society involved in agriculture, but this serves to illustrate how technological developments have reduced the need for basic farm labor.
Figure 1: A timeline showing how human transportation systems have evolved.
A timeline showing how human transportation systems have evolved, from primitive, slow, and inefficient vehicles, to modern, faster, and more efficient options. Corresponding advances in agricultural biotechnology are shown below, similarly illustrating how advances changed our ability to develop new agricultural crops.
© 2012 Nature Education Courtesy of Ania M. Wieczorek and Mark G. Wright. All rights reserved. View Terms of Use
This article concentrates on how scientific discoveries and technological developments have allowed us to improve crop development in agriculture. Most people do not realize that among early agriculture developments, really at the genesis of agricultural technology, the ancient Egyptians made wine and made rising dough for bread, using fermentation. A significant event in the development of agriculture occurred in 1492 with the introduction of corn, native to the Americas, to the rest of the world, and European growers adapted the plant to their unique growing conditions. At this stage of history, crops were being transported around the world and grown under a diversity of conditions.
Agriculturalists started conducting selective breeding of crops before having a thorough understanding of the basis of genetics. Gregor Mendel's discoveries explaining how traits pass from parents to offspring shed new light on the matter. Mendel's work showed that genes separate during the formation of gametes , and unite randomly during fertilization ; he also showed that genes are transmitted independently of one another to offspring. This understanding of the way that plants and animals acquire traits form parents created the potential for people to selectively breed crops and livestock. Gregor Mendel's discovery revolutionized agriculture by launching the development of selective cross breeding with a comprehensive understanding of the underlying mechanisms of inheritance.
Selective Cross Breeding
In traditional plant breeding, new varieties are developed either by selecting plants with desirable characteristics or by combining qualities from two closely related plants through selective breeding. These features may for example be resistance to a particular pest or disease, or tolerance to climatic conditions. Pollen with the genes for a desired trait is transferred from plants of one crop variety to the flowers of another variety with other desirable traits. Eventually, through careful selection of offspring, the desired trait will appear in a new variety of plants. Traditional plant breeding has produced numerous highly successful new varieties of crops over the centuries. There have also been many less than successful crosses made. In traditional breeding, crosses are often made in a relatively uncontrolled manner. The breeder chooses the parents to cross, but at the genetic level, the results are unpredictable. DNA from the parents recombines randomly, and desirable traits such as pest resistance may be bundled with undesirable traits, such as lower yield or poor quality. The parent plants must be closely related to produce offspring. Traditional breeding programs are time-consuming, often taking decades to produce new viable crop varieties, and labor-intensive. A great deal of effort is required to separate undesirable from desirable traits, and this is not always economically practical. Many potential benefits are lost along the way, as plants that fail to demonstrate the introduced characteristics are discarded. Traditional plant breeding takes on average 12-15 years to produce a new crop variety.
Classical Breeding with Induced Mutation
Mutations (Figure 2) are changes in the genetic makeup of a plant. Mutations occur naturally and sometimes result in the development of new beneficial traits. In 1940, plant breeders learned that they could make mutations happen faster with a process called mutagenesis. Radiation or chemicals are used to change the plant's DNA, thebasic molecular system of all organisms' genetic material. The goal is to cause changes in the sequence of the base pairs of DNA, which provide biochemical instructions for the development of plants. Resultant plants may possess new and desirable characteristics through this modification of their genetic material. During thisprocess, plant breeders must grow and evaluate each plant from each seed produced.
Figure 2: The effects of genetic mutations in carrots.
© 2012 Nature Education All rights reserved. View Terms of Use
More than 2,500 plant varieties (including rice, wheat, grapefruit, lettuce and many fruits) have been developed using radiation mutagenesis (FAO/IAEA, 2008) . Induced mutation breeding was widely used in the United States during the 1970's, but today few varieties are produced using this technique. As our understanding of genetics developed, so new technologies for plant variety development arose. Examples of these that are used today include genetic marker assisted breeding, where molecular markers associated with specific traits could be used to direct breeding programs, and genetic engineering. Some of the significant steps leading to the current state of the art are explained below.
1. Discovery by Watson and Crick: structure of DNA, 1953: Another milestone in the development of understanding of genetics and how genes function, was the discovery of the structure of DNA (the basis of genes), and how DNA works. Two scientists, James Watson and Francis Crick made this discovery (Pray 2008), considered to be one of the most significant scientific works in biology, largely through synthesis of the work of other scientists. Their work contributed significantly to understanding what genes were.
2. Discovering genes that move (transposons): Transposons are sections of DNA-genes-that move from one location to another on a chromosome . Transposons have been referred toas "jumping genes", genes that are able to move around. Interestingly, transposons may be manipulated to alter the DNA inside living organisms. Barbara McLintock (1950) discovered an interesting effect of transposons. She was able to show how the changes in DNA caused by transposons affected the color of maize kernels.
3. Tissue culture and plant regeneration: Another significant development in technology that was important for plant breeding was the development of micropropagation techniques, known as tissue culture (Thorpe 2007). Tissue culture permits researchers to clone plant material by excising small amounts of tissue fromplants of interest, and then inducing growth of the tissue on media, to ultimately form a new plant. This new plant carries the entire genetic information of the donor plant. Exact copies of a desired plant could thus be produced without depending on pollinators, the need for seeds, andthis could all be done quickly.
4. Embryo rescue: Often when distantly related plant species are hybridized are crossed, the embryos formed following fertilization will be aborted. The development of embryo rescue technology permitted crop breeders to make crosses among distantly related varieties, and then to save the resulting embryos and then grow them into whole plants through tissue culture.
5. Protoplast fusion: Protoplasts are cells that have lost their cell walls. The cell wall can be removed either by mechanical means, or by the action of enzymes. They are left with only a cell membrane surrounding the cell. Protoplasts can be manipulated in many ways that can be used inplant breeding. This includes producing hybrid cells (by means of cell fusion) and using protoplasts to introduce new genes into plant cells, which can then be grown using tissue culture techniques (Thorpe 2007).
6. Genetic engineering: Building on the above discoveries into the 1980s, advances in the field of molecular biology provided scientists with the potential to purposefully transfer DNA between organisms, whether closely or distantly related. This set the stage for potentially extremely beneficial advancement in crop breeding, but hasalso been very controversial.
Genetic Engineering of Organisms
The basic structure of DNA is identical in all living things. In all organisms, different characteristics are determined by the sequence of the DNA base pairs. Biotechnology has developed to the point where researchers can take one or more specific genes from nearly any organism, including plants,animals, bacteria, or viruses, and introduce those genes into the genome of another organism. This is called recombinant DNA technology (Watson etal . 1992). In 1978, the first commercial product arising from the use of recombinant DNA technology gene transfer was synthetic insulin . Pig and cattle pancreatic glands were previously the only way of producing insulin for human use. In 1988, chymosin (known as Rennin) was the first enzyme produced from a genetically modified source-yeast-to be approved for use in food. Previously this enzyme for cheese production was obtained from cows' stomach linings.
In agricultural biotechnology, changes are made directly to the plant's genome. Once the gene that determines a desirable trait is identified, it can be selected, extracted, and transferred directly into another plant genome (Figure 3). Plants that have genes from other organisms are referred to as transgenic. The presence of the desired gene, controlling the trait, can be tested for at any stage of growth, such as in small seedlings in a greenhouse tray. A breeder can thus quickly evaluate the plants that are produced and then select those that best express the desired trait. Producing new varieties of cropsthrough genetic engineering takes about 10 years on average.
Figure 3: The process of genetic engineering in papaya.
The process of genetic engineering in papaya. This is the first fruit tree ever genetically engineered (for resistance to a virus that kills papaya plants), conducted by Land Grant Universities (University of Hawaii and Cornell University) in the USA, and licensed to the Hawaii papaya industry for use and distribution.
© 2012 Nature Education Reprinted with permission: Land Grant Universities (University of Hawaii and Cornell University) All rights reserved. View Terms of Use
The applications of genetic engineering through recombinant DNA technology increased with time, and the first small scale field trials of genetically engineered plant varieties were planted and in the USA and Canada in 1990, followed by the first commercial release of genetically engineered crops in 1992. Since that time, adoption of genetic engineered plants by farmers has increased annually. While the benefits of genetically engineered crop varieties have been widely recognized, there has been extensive opposition to this technology, from environmental perspectives, because of ethics considerations, and people concerned with corporate control of crop varieties.
Comparing Classical Breeding and Crop Breeding Through Genetic Engineering
Crops produced through genetic engineering are sometimes referred to as genetically modified organisms. The term genetic modification, and so-called genetically modified organisms (GMOs) is frequently misused. All types (organic, conventional) of agriculture modify the genes of plants so that they will have desirable traits. The difference is that traditional forms of breeding change the plant's genetics indirectly by selectingplants with specific traits, while genetic engineering changes the traits by making changes directly to the DNA. In traditional breeding, crosses are made in a relatively uncontrolled manner. The breeder chooses the parents to cross, but at the genetic level, the results are unpredictable. DNA from the parents recombines randomly. In contrast, genetic engineering permits highly targeted transfer of genes, quick and efficient tracking of genes in new varieties, and ultimately increased efficiency in developing new crop varieties with new and desirable traits.
Conclusions: Technology, Progress, Opposition, and Risk Assessment
Many different tools are available for increasing and improving agricultural production. These tools include methods to develop new varieties such as classical breeding and biotechnology. Traditional agricultural approaches are experiencing some resurgence today, with renewed interest in organic agriculture; an approach that does not embrace the use of genetically engineered crops. The role that genetic engineering stands to play in sustainable agricultural development is an interesting topic for the future. As with the development of any new technology there are concerns about associated risks, and agricultural biotechnology is no exception. All crops developed using genetic engineering are subjected to extensive safety testing before being released for commercial use. Risk assessments are conducted for these new varieties, and only those that are safe for human use are released. Some concerns arise through people not fully understanding the reporting of risk. Many consider any level of risk unacceptable. Some prefer the application of the precautionary principle when releasing new technology, but this is not a realistic interpretation of what risk assessments tell us (See information presented by Land Grant Universities of the USA).
Extensive risk assessment and safety testing of crops developed through the use of genetic engineering has shown that there are no varieties in use that pose risks to consumers. This is not to say that new varieties should not be carefully examined for safety; each case should be considered on its unique merits.
References and Recommended Reading
American Association for the Advancement of Science. Annual meeting (2011). ( link )
Land Grant Universities (2011). ( link )
NERC. Can GM crops harm the environment? (2011). ( link )
McLintock, B. The origin and behavior of mutable loci in maize. Proceedings of the National Academy of Sciences of the United States of America 36 , 344–355 (1950).
Pray, L. A. Discovery of DNA structure and function: Watson and Crick. Nature Education Knowledge 1 , (2008). ( link )
Thorpe, T. A. History of plant tissue culture. Molecular Biotechnology 37 , 169–180 (2007).
Watson, J. D. et al . Recombinant DNA , 2nd ed. New York, NY: W. H. Freeman, 1992.
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