CHEMICAL SCIENCE

Scientists have created a new corn germplasm that is insect-resistant and herbicide resistant


Comparative experiments on herbicide tolerance in the field. Courtesy of Biotechnology Bulletin

Recently, the Biotechnology Bulletin published the insect-resistant herbicide transgenic corn 2HVB5 cultivated by Lang Zhihong, a researcher at the Institute of Biotechnology of the Chinese Academy of Agricultural Sciences, which is genetically stable, highly resistant to insects and herbicides, and can be used for the control of corn pests, especially nocturnal moths, and has good industrial application prospects.

Lang Zhihong’s research team cooperated with Zhang Jie’s team from the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences to obtain insect-resistant herbicide corn 2HVB5 by transforming corn using the insecticidal gene cry2Ah-vp with independent intellectual property rights and the herbicide-tolerant phosphine gene bar. The exogenous gene of 2HVB5 is integrated into the maize genome in a single copy form and stabilized. The cry2Ah-vp gene is a highly insect-resistant gene obtained by locus (Bt) cry2Ah gene by locus modification, and has good insecticidal activity against cry1A-resistant cotton bollworms.

Through indoor and field biological activity detection, 2HVB5 is highly resistant to oriental armyworm and cotton bollworm, and has obvious weight inhibition on grassland nocturnal moth, which can effectively control corn pests, especially nocturnal moths; It is tolerated in the field at 4 times the dose of glufosinate, and there is no significant difference in agronomic traits compared with the backcrossing parent Zheng 58.

The study proves that the high insecticidal activity Bt gene obtained through genetic engineering technology is an important genetic resource for the creation of new insect-resistant plants, reflecting the original innovation, the creation of insect-resistant herbicide corn 2HVB5 with independent intellectual property rights is a material resource for the control of corn pests, and the next step will be combined with the trans-crypto1A gene, the trans-crypto9 gene and the trans-vip3Aa gene insect-resistant maize to expand the insecticidal spectrum and delay the production of pest resistance.

The research has been funded by the major special project for the cultivation of new transgenic varieties and the Innovation Project of the Chinese Academy of Agricultural Sciences. (Source: China Science Daily Li Chen)

Related paper information:https://doi.org/10.13560/j.cnki.biotech.bull.1985.2022-0536



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