Prelims 2018 · Q63
Mediumभारत में विकसित आनुवंशिकतः रूपांतरित सरसों (जेनेटिकली मॉडिफाइड सरसों / GM सरसों) के सन्दर्भ में, निम्नलिखित कथनों पर विचार कीजिए :
- 1.GM सरसों में मृदा जीवाणु के जीन होते हैं जो पादप को अनेक किस्मों के पीड़कों के विरुद्ध पीड़क-प्रतिरोध का गुण देते हैं ।
- 2.GM सरसों में वे जीन होते हैं जो पादप में पर-परागण और संकरण को सुकर बनाते हैं ।
- 3.GM सरसों का विकास IARI और पंजाब कृषि विश्वविद्यालय द्वारा संयुक्त रूप से किया गया है ।
उपर्युक्त कथनों में से कौन-सा/से सही है/हैं ?
Read this question in English
With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements:
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 statements given above is/are correct?
(a) 1 and 3 only · (b) 2 only · (c) 2 and 3 only · (d) 1, 2 and 3
उत्तर और व्याख्या · explanation in English
Answer: (b) केवल 2
Only statement 2 is correct. India's GM mustard hybrid (DMH-11) carries the barnase, barstar and bar genes, which give a pollination-control system for producing hybrid seed. It was developed at the University of Delhi, not by IARI and Punjab Agricultural University, and its genes do not give pest resistance.
- ✗ 1. The transgenes are barnase (makes the plant male-sterile), barstar (restores fertility) and bar (tolerance to the herbicide Basta, and a marker for selecting transformed lines). None is a pest-resistance gene like Bt.
- ✓ 2. The barnase-barstar system controls pollination, so two chosen diverse parent lines can be cross-pollinated to make a high-yielding hybrid.
- ✗ 3. It was developed by the Centre for Genetic Manipulation of Crop Plants (CGMCP), University of Delhi South Campus, and cleared by the GEAC in 2022, not by IARI and Punjab Agricultural University.
Remember · GM mustard DMH-11 (Delhi University's CGMCP) uses the barnase-barstar-bar genes for hybrid seed production through pollination control, not for pest resistance.
Sources
- ICAR: Genetically modified (GM) Mustard hybrid will boost production and productivity ↗ “A robust pollination control system is required that would facilitate cross-pollination to help develop hybrids between any two selected diverse parental lines.”
- PIB: Statement by Secretary DARE and DG ICAR on GM mustard ↗ “In India, the Centre for Genetic Manipulation of Crop Plants (CGMCP), University of Delhi South Campus, New Delhi has made a successful attempt with some alterations in the barnase/ barstar system”
Question and answer: UPSC's official GS Paper I (2018, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). Permalink ·