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Full-scale genetic pattern and environmental association of Actinidia chinensis populations across ten mountain systems in China, and its significance for conservation

文献类型： 外文期刊

作者： Lu, Xue-Mei 1 ; Wang, Yan-Chang 1 ; Liu, Chuang 2 ; Liao, Li 1 ; Liu, Yongbo 3 ; Zhang, Jian-Wen 4 ; Zhong, Cai-Hong 1 ; Li, Zuo-Zhou 1 ;

作者机构： 1.Chinese Acad Sci, Wuhan Bot Garden, Wuhan, Peoples R China

2.Anhui Acad Agr Sci, Inst Soil & Fertilizer, Hefei, Peoples R China

3.Chinese Res Inst Environm Sci, State Environm Protect Key Lab Reg Ecoproc & Funct, Beijing, Peoples R China

4.Xinjiang Bayingoleng Mongolian Autonomous Prefectu, Korla, Peoples R China

关键词： Actinidia chinensis; Barrier analysis; Differentiation; Genetic structure; Dispersal environment

期刊名称：TREE GENETICS & GENOMES （ 影响因子：2.4； 五年影响因子：2.4 ）

ISSN： 1614-2942

年卷期： 2023 年 19 卷 6 期

页码：

收录情况： SCI

摘要： In this study, it was the first time that genetic diversity and differentiation pattern of Actinidia chinensis populations across the species native range in China were investigated on 12 nuclear microsatellite markers. Effect of environment in these mountains on the pattern was also explored. Qinling Mountains was shown to have the highest genetic diversity in the A. chinensis. By contrast, the lowest genetic diversity of the species was confirmed in Nanling Mountains. The highest differentiation was observed between populations in Qinling and Nanling, while the least differentiation was observed between populations from Wuling and Luoxiao Mountains. The diploid var. chinensis populations were clustered into 4 ancestral groups. Strong structure of diploid var. chinensis was confirmed by the single Delta K peak, while different Delta K peaks for hexaploid var. deliciosa suggested a weak structure. Stepwise regression analysis was also conducted between alleles and bioclimatic variables. Isothermality (Bio3) and precipitation seasonality (Bio15) significantly affect variation in most of the alleles. UDK96-001, Ke129, and Ke209 were found to have a higher number (>50 loci) of loci significantly associated with the bioclimatic variables. We suggest three dispersal routes for A. chinensis population based on present data and chloroplast data: (1) the relic population dispersal from Wuyi Mountains to Huangshan and Tianmu Mountains, across Baba Mountains, finally reach Qinling Mountains; (2) the populations dispersal from Wuyi Mountains to Luoxiao Mountains, then go into Nanling and Xuefeng Mountains, afterwards, one expands to Wuling Mountains and arrives to Daba and Qinling Mountains; (3) one branch of 2 goes into Yungui Plateau and finally arrives to Hengduan Mountains. Our results also provide fundamental genetic information for conservation of the species germplasm to improve the genetic basis for breeding its cultivars.

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