Barstar Barnase system • Barnase ( amino acids) is a secreted ribonuclease from Bacillus amyloliquefaciens. Barstar (89 amino acids) is a. Barnase-barstar system is tested in many crops; however, issues such as leaky expression of the barnase gene and difficulty in obtaining. Trends Biochem Sci. Nov;14(11) Barnase and barstar: two small proteins to fold and fit together. Hartley RW. Barnase and barstar are the.
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The Genetic Engineering Appraisal Committee GEACwhich approves proposals relating to trials and commercialisation of genetically modified GM crops, placed in the public domain a safety assessment report on a transgenic mustard hybrid developed by scientists at Delhi University. These would then be reviewed by both the subcommittee and the GEAC, before a final decision is taken. Since a one-month period has been given for receiving comments, an approval by mid-October should provide reasonable time to plant the transgenic mustard in the coming rabi season for commercial seed production and multiplication.
Largescale cultivation by farmers can follow in But we know from past experience that GM crop clearances are never a smooth affair.
In a narrow sense, yes. But lint accounts for just about a third of the kapaas or raw un-ginned cotton that farmers harvest. The balance two-thirds comprises the cotton seed that is crushed in order to extract oil, and de-oiled cake or meal. That makes Bt cotton no less a food crop, as the oil from its seeds and the milk from the animals fed on its de-oiled cake are already being consumed by us.
Bt cotton incorporates foreign genes isolated from Bacillus thuringiensis, a commonly occurring soil bacterium.
Just as nothing calamitous has happened to us from ingesting Bt proteins all these years, there is no evidence of the Barnase, Barstar and Bar proteins being toxic to either humans or animals.
For the GM mustard, toxicity and allergenicity assessment studies were specifically carried out at the National Institute of Nutrition, Hyderabad, based on a day feeding of leaves and seeds from it to laboratory rats. These did not reveal any ill effects in terms of the relevant measured parameters. It is important to point out here that India annually imports over 3. This is over and above the 30 lt imports of soyabean oil that is entirely GM.
There have been no protests against such videshi GM oil by so-called swadeshi and green groups, who have directed all their protests against GM mustard, despite it being a product of indigenous, publicly-funded research. And what exactly is the GM mustard that the DU scientists have developed? But the problem with mustard is that its flowers contain both female and male reproductive organs, making the plants systme self-pollinating.
When the egg cells of one plant cannot be easily fertilised by the pollen grains from another, the scope for developing hybrids through crossing of parents from divergent genetic pools is restricted. This is where GM technology comes in. The Barnase gene alluded to earlier, codes for a protein that impairs pollen production. The plant into which it is incorporated, then becomes male-sterile, and capable of receiving pollen from another parent.
Barnase Barstar Gene of Male Sterility |authorSTREAM
That plant, in turn, contains the Barstar gene, which blocks the action of the Barnase gene. They are missing the point. GM technology, more than anything else, expands the scope of breeding in mustard, which is otherwise hampered by it being a naturally self-pollinating plant.
DMH could just be the start, as the Barnase-Barstar system can enable the development of hybrids from a wide range of Indian and East European mustards. These may not only yield higher levels of heterosis, but also help introduce other traits such as resistance to alternaria blight or stem rot diseases that is limited through conventional breeding.
India, moreover, needs to also boost its edible oil production, which, inwas estimated at a mere 72 lt, as against imports of lt. Like Liked by 1 person.
GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests. GM mustard has the genes that allow the plant cross-pollination and hybridization. You are commenting using your WordPress. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. If all goes well, will this be the first GM food crop that Indian farmers will plant?
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Explaining on GM mustard Development – Barnase-Barstar system
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