Environmental and Historical Determinants of Patterns of Genetic Differentiation in Wild Soybean (Glycine soja Sieb. et Zucc).
Environmental and Historical Determinants of Patterns of Genetic Differentiation in Wild Soybean (Glycine soja Sieb. et Zucc).
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野生大豆（Glycine soja Sieb. et Zucc）遗传分化模式的环境和历史决定因素
DOI：
10.1038/srep22795
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发表时间：
2016-03-08
影响因子：
4.6
通讯作者：
Yi TS
中科院分区：
文献类型：
--
作者：
He SL;Wang YS;Li DZ;Yi TS
野生大豆是栽培大豆的直接祖先，广泛分布于东亚大陆和日本列岛。采用基于20个核微卫星和1个质体位点的群体遗传学分析相结合的多学科方法，揭示了野生大豆的遗传变异，以及地理、环境因素和历史气候变化对其遗传分化模式的贡献。野生大豆具有较高的遗传多样性和显著的遗传分化。野生大豆在末次冰盛期仅分布于中国中南部，而在末次冰盛期后，野生大豆的分布范围向东亚北方扩展。据预测，到2080年代，范围将大幅向北移动。环境隔离（IBE）对野生大豆遗传分化的影响大于地理隔离（IBD），表明环境因素是野生大豆适应性生态地理分化的主要原因。研究表明，大豆遗传分化与历史气候变化共同形成了野生大豆的遗传变异和分化模式。应根据不同种群对未来气候变化和人类引起的环境变化的适应潜力，对不同种群实施不同的保护措施。
Wild soybean, the direct progenitor of cultivated soybean, inhabits a wide distribution range across the mainland of East Asia and the Japanese archipelago. A multidisciplinary approach combining analyses of population genetics based on 20 nuclear microsatellites and one plastid locus were applied to reveal the genetic variation of wild soybean, and the contributions of geographical, environmental factors and historic climatic change on its patterns of genetic differentiation. High genetic diversity and significant genetic differentiation were revealed in wild soybean. Wild soybean was inferred to be limited to southern and central China during the Last Glacial Maximum (LGM) and experienced large-scale post-LGM range expansion into northern East Asia. A substantial northward range shift has been predicted to occur by the 2080s. A stronger effect of isolation by environment (IBE) versus isolation by geographical distance (IBD) was found for genetic differentiation in wild soybean, which suggested that environmental factors were responsible for the adaptive eco-geographical differentiation. This study indicated that IBE and historical climatic change together shaped patterns of genetic variation and differentiation of wild soybean. Different conservation measures should be implemented on different populations according to their adaptive potential to future changes in climate and human-induced environmental changes.