Consider the following statements regarding Genetically Modified mustard. 1. GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests.  2. GM mustard has the genes that allow the plant cross-pollination and hybridization.  3. GM mustard has been developed jointly by the IARI and Punjab Agricultural University. Which of the following statements given above is/are correct?

Consider the following statements regarding Genetically Modified mustard. 1. GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests.  2. GM mustard has the genes that allow the plant cross-pollination and hybridization.  3. GM mustard has been developed jointly by the IARI and Punjab Agricultural University. Which of the following statements given above is/are correct? Correct Answer 2 only

The correct answer is 2 only.

Important Points

  • It is developed by using three genes viz., barnase,  barstar and bar from Bacillus amyloliquefaciens for hybrid seed production.
  • The barnase gene confers male sterility to a plant in which it is inserted and barstar gene restore the fertility to produce fertile hybrid plants and seeds. Hence statement 1 is not correct.
  • The third gene bar synthesizes an enzyme call PAT, which is responsible for tolerance to glufosinate in the plant.
  • Glufosinate is a broad-spectrum herbicide, which indiscriminately eliminates weeds and any plant that does not have the bar gene.
    • Glufosinate herbicides contain the active ingredient phosphinothricin, which kills plants by blocking the enzyme responsible for nitrogen metabolism and for detoxifying ammonia, a by-product of plant metabolism.
  • It has mainly two genes (‘barnase’ and ‘barstar’) that allow for cross-pollination and hybridisation in mustard, which is largely a self-pollinating plant because of its individual flowers containing both female and male reproductive organs. Hence statement 2 is correct.
  • GM mustard was developed by scientists at Delhi University and the project was part-funded by the Department of Biotechnology, a division of the Science Ministry. Hence statement 3 is not correct.

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