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Notice of the second round of the 2016...

Author:Admin Time:2016-10-11

On October 25, 2016,  Guang-cun He  and   Rongzhi Chen  team in state key laboratory of hybrid rice, published "Allelic'm in an NLR gene BPH9 enables rice to combat planthopper variation" on  Proceedings of the National Academy of Sciences (http://www.pnas.org/content/early/2016/10/21/1614862113.abstract).doctoral student Yan Zhao, Jin Huang and Zhizheng Wang were the first coauthors. The research was supported by  the key project of national natural science funds, ‘973’, and ‘863’ projects.

Rice, one of the most important food crops in the world, also feeds the BPH, which is born exclusively with rice and reduces the harvest in different extent.In order to resist BPH feeding, rice evolved the insect resistance naturally; while BPH can forms biological group that overcomes the resistance of rice, in turn, rice generates new resistance against BPH.The co-evolutionary relationship, like a feedback, ensure that BPH will not harm seriously  the traditional rice cultivation.

This team cloned BPH9, a BPH resistance gene on the long arm of in the 12 chromosomes of rice, collaborated with Qifa Zhang team in huazhong agricultural university.  They also found seven BPH resistance genes on this chromosome section are BPH9 alleles.Because BPH9 allelic variation of rice can resist different BPH biotype group, and  reveals that the insect-resistant gene allelic variation is important strategies to the variation of BPH populations .The article  also analyzed the BPH9 genes in rice population differentiation and evolution characteristics.

Based on BPH9 allelic type distribution in wild rice and cultivated rice,  they found that the anthropic insect-resistant breeding practice repeats the process of evolution by natural selection, The allelic type 1 is first appeared wild rice insect-resistant  type, and the first application in the modern insect-resistant breeding , followed by allelic type 2..The  newly found allelic type 7 and allelic type 9 were characterized by resistance to three biological type of BPH.

 Before the paper is published, BPH9 has obtained a patent for invention authorization and new germplasms of insect-resistant breeding units which were cultivated by using BPH9 are widely used all over the country.