Genomic insights into adaptation to heterogeneous environments for the ancient relictualCircaeaster agrestis(Circaeasteraceae, Ranunculales)

被引:36
作者
Zhang, Xu [1 ,2 ,3 ]
Sun, Yanxia [1 ,2 ]
Landis, Jacob B. [4 ,5 ,6 ]
Zhang, Jianwen [7 ]
Yang, Linsen [8 ]
Lin, Nan [1 ,2 ,3 ]
Zhang, Huajie [1 ,2 ]
Guo, Rui [1 ,2 ,3 ]
Li, Lijuan [1 ,2 ,3 ]
Zhang, Yonghong [7 ]
Deng, Tao [7 ]
Sun, Hang [7 ]
Wang, Hengchang [1 ,2 ]
机构
[1] Chinese Acad Sci, CAS Key Lab Plant Germpiasm Enhancement & Special, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China
[2] Chinese Acad Sci, Ctr Conservat Biol, Core Bot Gardens, Wuhan 430074, Hubei, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92507 USA
[5] Cornell Univ, Sch Integrat Plant Sci, Sect Plant Biol, Ithaca, NY 14850 USA
[6] Cornell Univ, LH Bailey Hortorium, Ithaca, NY 14850 USA
[7] Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
[8] Adm Shennongjia Natl Pk, Hubei Key Lab Shennongjia Golden Monkey Conservat, Shennongjia 442400, Hubei, Peoples R China
基金
国家重点研发计划; 国家自然科学基金重大项目;
关键词
Circaeaster agrestis; conservation; environmental heterogeneity; genetic structure; local adaptation; restriction site-associated DNA sequencing (RAD-seq); temperature variables; EFFECTIVE POPULATION-SIZE; GENETIC-STRUCTURE; SOFTWARE PACKAGE; LOCAL ADAPTATION; PLANT DIVERSITY; R-PACKAGE; EVOLUTION; CLIMATE; LANDSCAPE; PHYLOGEOGRAPHY;
D O I
10.1111/nph.16669
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Investigating the interaction between environmental heterogeneity and local adaptation is critical for understanding the evolutionary history of a species, providing the premise for studying the response of organisms to rapid climate change. However, for most species how exactly the spatial heterogeneity promotes population divergence and how genomic variations contribute to adaptive evolution remain poorly understood. We examine the contributions of geographical and environmental variables to population divergence of the relictual, alpine herbCircaeaster agrestis, as well as the genetic basis of local adaptation using RAD-seq and plastome data. We detected significant genetic structure with an extraordinary disequilibrium of genetic diversity among regions, and signals of isolation-by-distance along with isolation-by-resistance. The populations were estimated to begin diverging in the late Miocene, along with a possible ancestral distribution of the Hengduan Mountains and adjacent regions. Both environmental gradient and redundancy analyses revealed significant association between genetic variation and temperature variables. Genome-environment association analyses identified 16 putatively adaptive loci related mainly to biotic and abiotic stress resistance. Our genome-wide data provide new insights into the important role of environmental heterogeneity in shaping genetic structure, and access the footprints of local adaptation in an ancient relictual species, informing future conservation efforts.
引用
收藏
页码:285 / 301
页数:17
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