Genome-scale analysis predicts plant-virus related genes accelerating evolution in Glycine max
会议名称：《第十九届中国作物学会学术年会》
会议日期：2020年
关 键 词：soybean leguminosae comparative genomic gene expansion plant virus
摘 要：Soybean is an important source of vegetable oil and protein in the world, which is a member of Papilionoideae including many crops, vegetables or forages. A comparative genomic research was performed in ten Papilionoideae plants to reveal the evolutionary characteristics. 376,524 genes were collected by hidden markov model search. The orthology was detect by markov cluster algorithm in OrthoFinder, and the gene gain and loss was analyzed to find expansive gene-families. At lased positive darwinian selection of the expansive gene-family in soybean was performed to reveal evolution characteristics. The expansive orthogroups in leguminous mainly involved virus resistance and endogenous viral elements genes. NBS-LRRs constituting the largest plant disease resistance gene-family, were expansive in many leguminosae plants. And all the expansive NBS-LRRs were undergoing positive darwinian selection in soybean, showing an accelerated evolution. Endogenous viral elements were plant virus derived sequences present within the host genome. Two endogenous viral elements Reverse transcriptase and Movement protein were also expansive in legumes. Therefore both the antiviral genes NBS-LRR and some endogenous viral elements tended to expand in some leguminosae plants. In the long time of complex parasitic relationship, plant-viruses continuously infected legumes plants;then a large number of NBS-LRR genes were duplicated as an adaptive evolution;but in this process, many virus sequences were inserted into the leguminous genome as endogenous viral elements. Gene expansion of virus resistance and endogenous viral elements genes demonstrated the changes of legume genome caused by virus parasitism.