Insights into genomic structure and evolutionary processes of coastal Suaeda species in East Asia using cpDNA, nDNA, and genome-wide SNPs

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利用cpDNA、nDNA和全基因组SNPs研究东亚沿海碱蓬物种的基因组结构和进化过程

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来源：

Nature

全文链接：

//agri.nais.net.cn/topic/downloadFile/0bfd8b9e-a322-49f1-9835-d91745a8d5df

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资源所属：

种质资源保护与创制专题

类型：

学术文献

语种：

英语

原文发布日期：

2020-12-01

摘要：

Species in the genus Suaeda have few diagnostic characters and substantial morphological plasticity. Hence, regional foras do not provide clear taxonomic information for Suaeda spp. in East Asia. In order to assess the taxonomy of four species in the genus Suaeda (S. australis, S. maritima, S.japonica, and S. heteroptera), cpDNA (rpl32-trnL and trnH-psbA), nDNA (ITS), and MIG-seq analyses were carried out. Genome-wide SNP results indicated three lineages: (1) S. australis in Korea and S. maritima in Japan, (2) S. maritima in Korea and S. heteroptera in China, and (3) S. japionica. In phylogenetic trees and genotype analyses, cpDNA and nDNA results showed discrepancies, while S. japonica and S. maritima in Korea, and S. heteroptera in China shared the same haplotype and ribotype. We suggest that the shared haplotype may be due to chloroplast capture. Based on our results, we assume that S. japonica was formed by homoploid hybrid speciation between the two lineages.