Genomic Variation Underpins Genetic Divergence and Differing Salt Resilience in Sesbania bispinosa

文献类型： 外文期刊

第一作者： Huang, Gai

作者： Huang, Gai;Song, Xianwei;Wang, Xiaofei;He, Kaixuan;Hou, Xiu-Li;Luo, Haofei;Zhang, Shuaibin;You, Changqing;Deng, Xian;Cao, Xiaofeng;Liu, Chengli;Liu, Chengli;He, Kaixuan;Jia, Yajun;Wang, Fuqiang;Liu, Guodao

作者机构：

关键词： genome evolution; genomic variation; halophytes; salt stress; sesbania

期刊名称：ADVANCED SCIENCE （ 影响因子：14.1； 五年影响因子：15.6 ）

ISSN：

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Halophytes possess inherent stress resilience and diverse adaptations, making them valuable genetic reservoirs for crop breeding. The leguminous halophyte Sesbania bispinosa is a valuable forage crop that thrives in saline soils. To explore its salt tolerance, high-quality genome assemblies is generated for the salt-tolerant S. bispinosa accession SbTA02 and the salt-sensitive accession SbSA44. Genomic analysis revealed that the genomic divergence between the two accessions primarily originates from their pericentromeric and centromeric regions, which contain the two largest inversions: a >27-Mb inversion on chromosome 5 and a approximate to 49-Mb inversion on chromosome 6. Population-level analysis revealed that the 27-Mb inversion is widespread in S. bispinosa, dividing the tested populations into inland and coastal groups. These groups have many genetic divergence regions (GDRs), with genetically isolated haplotypes in the middle section of chromosome 5, including the large inversion and centromeric regions. Genome-wide association studies (GWAS) identified significant salt-tolerance signals in the GDRs, pinpointing the anthocyanidin synthase gene SbANS. Natural variation in SbANS is associated with differences in salt tolerance between salt-tolerant and salt-sensitive S. bispinosa accessions. These findings provide insights into the genomic evolution of the Sesbania genus and shed light on how genomic variation shapes genome architecture, genetic divergence, and phenotypic differentiation.

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