Insights from putatively neutral EST-SSR markers on the population genetic structure and genetic diversity of the Qinghai-Tibetan Plateau endemic Medicago archiducis-nicolai Sirjaev
Insights from putatively neutral EST-SSR markers on the population genetic structure and genetic diversity of the Qinghai-Tibetan Plateau endemic Medicago archiducis-nicolai Sirjaev
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中立EST-SSR标记对青藏高原特有种紫花苜蓿种群遗传结构和遗传多样性的见解
DOI：
10.1007/s10722-021-01147-y
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发表时间：
2021-03
期刊：
影响因子：
--
通讯作者：
王海庆
中科院分区：
文献类型：
--
作者：
王英芳;沈迎芳;刘德梅;刘瑞娟;王海庆
紫花苜蓿（Medicago archiducis-nicolai Sirjaev）和紫花苜蓿（M.白藓属（L.）Ledebour是苜蓿属Platycarpus组中的两个近缘种。M. archiducis-nicolai是青藏高原特有种，比M.在高寒草甸地区，具有驯化利用的潜力。本文利用20个中性EST-SSR标记分析了这些物种的群体遗传结构和遗传多样性。24个野生种群，包括21个M. archiducis-nicolai和3 M.根据目前的分类学结果，将其分为两个类群。21 M。archiducis-nicolai种群被聚类为两个地理上相关的组。种群遗传距离与地理距离和海拔差异等地理因素呈正相关关系，揭示了木兰种群的遗传分化。archiducis-nicolai种群是由地理距离和QTP的复杂地形驱动的。青藏高原特有的窄分布的紫花苜蓿（Medicago archiducis-nocilai）的遗传多样性低于分布更广的苜蓿。你好青藏高原中央平台的紫花苜蓿种群具有较高的遗传多样性，而东部平台和边缘的紫花苜蓿种群则表现出不同的遗传多样性水平，表明中央平台存在避难所。这些结果对M. archiducis-nicolai和提供新的见解的机制，这种物种的适应QTP的恶劣环境。
Medicago archiducis-nicolai Sirjaev and M. ruthenica (L.) Ledebour are two phylogenetically closely related species in the section Platycarpae within Medicago. M. archiducis-nicolai is endemic to the Qinghai–Tibetan Plateau (QTP), shows more tolerance to abiotic stress than M. ruthenica, which inhabits relatively temperate areas, and has the potential to be domesticated and used as a legume forage germplasm in alpine meadows. Here, we analyzed the population genetic structure and genetic diversity of these species using 20 putatively neutral EST-SSR markers. Twenty-four wild populations, including 21 M. archiducis-nicolai and 3 M. ruthenica, were divided into two clusters that were consistent with current taxonomy. The 21 M. archiducis-nicolai populations were clustered into two geographically related groups. Positive relationships between population genetic distance and geographical factors, including geographical distance and altitudinal difference, revealed that the genetic differentiation of M. archiducis-nicolai populations was driven by both geographical distance and the complex topography of the QTP. Medicago archiducis-nocilai, a narrow-range endemic on the QTP, had lower genetic diversity than the more widespread M. ruthenica. Medicago archiducis-nicolai populations from the central platform of the QTP had relatively high genetic diversity, whereas those occupying the east platform and edge of the QTP showed variable levels of genetic diversity, implying the presence of refugia on the central platform. These results have implications for the genetic resource management and exploitation of M. archiducis-nicolai and provide novel insights into the mechanisms underlying the adaptation of this species to the harsh environment of the QTP.
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影响因子：
4.9
作者：
L. Meng;Rui Yang;R. Abbott;G. Miehe;Tianhua Hu;Jianquan Liu
通讯作者：
L. Meng;Rui Yang;R. Abbott;G. Miehe;Tianhua Hu;Jianquan Liu
影响因子：
4.9
作者：
Gilbert, Kimberly J.;Andrew, Rose L.;Vines, Timothy H.
通讯作者：
Vines, Timothy H.
DOI：
10.1007/s002540000174
发表时间：
2000-11
期刊：
Environmental Geology
影响因子：
--
作者：
Dianfa Zhang;L. Fengquan;B. Jianmin
通讯作者：
Dianfa Zhang;L. Fengquan;B. Jianmin
影响因子：
4.2
作者：
Juan Yan;Hai-jia Chu;Hengchang Wang;Jian-qiang Li;T. Sang
通讯作者：
Juan Yan;Hai-jia Chu;Hengchang Wang;Jian-qiang Li;T. Sang
影响因子：
2
作者：
Campbell, TA;Bao, G;Xia, ZL
通讯作者：
Xia, ZL