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Equipped for Migrations Across High Latitude Regions? Reduced Spur Length and Outcrossing Rate in a Biennial Halenia elliptica (Gentianaceae) With Mixed Mating System Along a Latitude Gradient
Yang, Ming-Liu1; Wang, Lin-Lin2; Zhang, Guo-Peng1; Meng, Li-Hua1; Yang, Yong-Ping2,3; Duan, Yuan-Wen2,3
2018-06-25
发表期刊FRONTIERS IN GENETICS
ISSN1664-8021
卷号9
摘要Halenia (Gentianaceae) originated from the mountain regions of East Asia, and diversified in America following long migrations via Beringia. While Halenia elliptica, one species of the genus in China, migrated toward high latitudes in China. Spur length of H. elliptica is highly variable. We examined the relationship between spur length and mating pattern along a latitude gradient. Field experiments were performed in two populations of H. elliptica, and we found that this species could produce seeds via both autonomous selfing and the aid of pollinators, suggesting a mixed mating system. In seven populations of H. elliptica along a latitudinal gradient, we found a trend of decrease in spur length with the increase of latitude. Based on molecular data from 11 microsatellite loci, we found that multilocus outcrossing rate decreased with the increase of latitude while the estimated inbreeding depression increased significantly, indicating that a high degree of inbreeding depression might have prevented evolution toward complete selfing in the high latitude populations with short spur length, and thus maintained mixed mating system of H. elliptica. Our results suggest that the mixed mating system of this species might be helpful in overcoming pollinator scarcity in newly colonized populations toward high latitudes after its origination in the mountain regions of China, and the decrease of spur length in the high latitude populations could result from reduced resource allocation to pollinator associated traits.
关键词Halenia Elliptica Spur Length Mixed Mating System Latitude Gradient Autonomous Selfing Inbreeding Depression
DOI10.3389/fgene.2018.00223
语种英语
WOS记录号WOS:000436162500001
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/61425
专题中国科学院青藏高原研究所昆明部
作者单位1.Yunnan Normal Univ, Key Lab Ecol Adapt Evolut & Conservat Anim Plants, Key Lab Yunnan Biomass Energy & Biotechnol Enviro, Sch Life Sci,Southwest Mt Ecosyst Univ Yunnan Pro, Kunming, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Kunming, Yunnan, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res Kunming, Kunming, Yunnan, Peoples R China
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Yang, Ming-Liu,Wang, Lin-Lin,Zhang, Guo-Peng,et al. Equipped for Migrations Across High Latitude Regions? Reduced Spur Length and Outcrossing Rate in a Biennial Halenia elliptica (Gentianaceae) With Mixed Mating System Along a Latitude Gradient[J]. FRONTIERS IN GENETICS,2018,9.
APA Yang, Ming-Liu,Wang, Lin-Lin,Zhang, Guo-Peng,Meng, Li-Hua,Yang, Yong-Ping,&Duan, Yuan-Wen.(2018).Equipped for Migrations Across High Latitude Regions? Reduced Spur Length and Outcrossing Rate in a Biennial Halenia elliptica (Gentianaceae) With Mixed Mating System Along a Latitude Gradient.FRONTIERS IN GENETICS,9.
MLA Yang, Ming-Liu,et al."Equipped for Migrations Across High Latitude Regions? Reduced Spur Length and Outcrossing Rate in a Biennial Halenia elliptica (Gentianaceae) With Mixed Mating System Along a Latitude Gradient".FRONTIERS IN GENETICS 9(2018).
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