The Lesson Learned from the Unique Evolutionary Story of Avirulence Gene <i>AvrPii </i>of <i>Magnaporthe oryzae</i>

• DOI: 10.20944/preprints202304.0466.v1
• Publication Date: 2023-04-19T00:36:54Z
• Authors: Xing Wang; Weihuai Wu; Yaling Zhang; Cheng Li; Jinyan Wang; Jianqiang Wen; Shulin Zhang; Yongxiang Yao; Weisheng Lu; Zhenghong Zhao; Jiasui Zhan; Qinghua Pan
• Keywords: Gene pool

Blast, caused by Magnaporthe oryzae, is one of the most destructive diseases affecting rice production. Understanding population dynamics pathogen avirulence genes pre-required for breeding and then deploying new cultivars carrying promising resistance genes. The divergence structure AvrPii was dissected in populations southern (Guangdong, Hunan, Guizhou) northern (Jilin, Liaoning, Heilongjiang) China, via genetic evolutionary approaches. between a known haplotype AvrPii-J novel AvrPii-C demonstrated haplotype-specific amplicon-based sequencing transformation. different avirulent performances set seven haplotype-chimeric mutants suggested that integrity full-length gene structures crucial to express functionality individual haplotypes. family shaped balancing, purifying, positive selection pressures Chinese populations. recognized as wild type emerged before domestication. Considering higher frequencies isolates were detected Guizhou, cognate Pii could be continuously served basic critical resource such regions. unique found China have significant implications understanding how has kept an artful balance purify among its members (haplotypes) those keenly interact with under gene-for-gene relationships.