Seed germination schedule and environmental context shaped the population genetic structure of subtropical evergreen oaks on the Yun-Gui Plateau, Southwest China
Seed germination schedule and environmental context shaped the population genetic structure of subtropical evergreen oaks on the Yun-Gui Plateau, Southwest China
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种子发芽时间表和环境背景塑造了中国西南云贵高原亚热带常绿橡树的种群遗传结构
DOI：
10.1038/s41437-019-0283-2
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发表时间：
2019-11
期刊：
影响因子：
3.8
通讯作者：
Li Ying
中科院分区：
文献类型：
--
作者：
Xu Jin;Song Yi-Gang;Deng Min;Jiang Xiao-Long;Zheng Si-Si;Li Ying
中国西南常绿阔叶林（EBLF）环境长期稳定，植物区系多样，形成全球生物多样性热点地区。然而，形成这些 EBLF 中物种遗传多样性模式的关键驱动因素尚不清楚。肖特基亚纳，和Q. kerriiare 同域橡树物种，具有这些 EBLF 的典型种子生物学特征。本研究结合多位点系统发育地理学和生态位模型来筛选33Q。德拉瓦伊种群。与之前对Q的研究进行比较，推断出它们的群体遗传结构。肖特基亚纳和 Q.凯里。还研究了所有三个物种的种子发芽特性。 cpDNA 在 Q 中显示出显着的系统发育地理学结构。 delavayi，在 Q 中未检测到。肖特基亚纳orQ.栎树，Q.凯里和Q。 schottkyana 表现出不同的花粉到种子的迁移比率（分别为 r = 219、117 和 22），这与橡子的发芽时间表有关。 Q 的分布。德拉瓦伊和 Q.自末次盛冰期（LGM）以来，肖特基亚纳一直保持长期稳定，沿纬度具有类似的 nSSR 遗传梯度变化。相反，Q.自末次盛冰期以来，由于环境异质性，kerrii 经历了显着的范围扩张，田中线东部和西部之间存在遗传多样性。这些结果表明种子性状和环境异质性是塑造中国西南地区 EBLF 树种群遗传结构的两个关键驱动因素。这些都应该在区域林业保护和管理中予以考虑。
The evergreen broadleaved forests (EBLFs) of Southwest China have a long-term stable environment and support a diverse flora, thus forming a global biodiversity hotspot. However, the key drivers that have shaped the genetic diversity patterns of species in these EBLFs are not well understood.Quercus delavayi,Q. schottkyana, andQ. kerriiare sympatric oak species with different seed biological traits that are typical for these EBLFs. This study combined multilocus phylogeography and ecological niche modeling to screen 33Q. delavayipopulations. Their population genetic structure was inferred in comparison with previous studies onQ. schottkyanaandQ. kerrii. The seed germination traits of all three species were also investigated. cpDNAs showed a significant phylogeographic structure inQ. delavayi, which was not detected inQ. schottkyanaorQ. kerrii.Quercus delavayi,Q. kerrii, andQ. schottkyanaexhibited different pollen-to-seed migration ratios (r= 219, 117, and 22, respectively), which are linked to the germination schedules of acorns. The distributions ofQ. delavayiandQ. schottkyanaremained long-term stable since the last glacial maximum (LGM) with a similar nSSR genetic gradient change along latitude. Instead,Q. kerriiexperienced a prominent range expansion since the LGM with genetic diversification between the East and the West of the Tanaka line due to environmental heterogeneity. These results identify seed traits and environmental heterogeneity as two key drivers that shape the population genetic structure of EBLF trees in Southwest China. These should be considered in regional forestry conservation and management.
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影响因子：
3.7
作者：
Liu, Jian-Quan;Duan, Yuan-Wen;Sun, Hang
通讯作者：
Sun, Hang
影响因子：
3.3
作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
通讯作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
影响因子：
3.7
作者：
Whitlock BA;Hale AM;Groff PA
通讯作者：
Groff PA
中国南方亚热带山地云雾林珍稀树种的保护遗传学：以山毛榉（壳斗科）为例
影响因子：
2.4
作者：
Deng Min;Westwood Murphy;Song Yi-Gang;Zheng Si-Si
通讯作者：
Zheng Si-Si
栎属物种果实发芽的生境相关温度要求：青冈栎亚属（亚洲常绿橡树）和栎属栎属的比较研究
影响因子：
3.1
作者：
Ke Xia;Matthew I. Daws;Zhe-Kun Zhou;Hugh W. Pritchard
通讯作者：
Hugh W. Pritchard