https://scholars.lib.ntu.edu.tw/handle/123456789/637119
標題: | The Past Contribution and Future Fate of Genetic Variants under Climate Change in an Island Population of Musa itinerans | 作者: | Lin, Ya-Ping Lu, Cheng-Yueh CHENG-RUEI LEE |
關鍵字: | climate change; genetic variation; local adaptation; new mutation; standing ancestral variation | 公開日期: | 十月-2023 | 出版社: | University of Chicago Press | 卷: | 202 | 期: | 4 | 起(迄)頁: | 558-570 | 來源出版物: | The American naturalist | 摘要: | AbstractGenetic variation within species is crucial for sessile species to adapt to novel environments when facing dramatic climate changes. However, the debate continues whether standing ancestral variation adaptive to current environmental variability is sufficient to guarantee future suitability. Using wild banana Musa itinerans, we investigated the relative contribution of standing ancestral variation versus new mutations to environmental adaptation and inferred their future fate. On the continental island of Taiwan, local populations immigrated from the Southeast Asian continent during the ice age and have been isolated since then. This allows the classification of genetic variants into standing ancestral variation (polymorphic in Taiwan and the continent) and new mutations (polymorphic only in Taiwan). For temperature-related variables where Taiwan is mainly within the ancestral climatic range, standing ancestral variation had a slightly stronger association than new mutations. New mutations were more important for precipitation-related variables, where northeastern Taiwan had much more winter rainfall than most of continental Southeast Asia. Upon future climate change, new mutations showed higher genetic offset in regions of abrupt transition between allele frequency and local environments, suggesting their greater spatial heterogeneity of future vulnerability. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/637119 | ISSN: | 00030147 | DOI: | 10.1086/726015 |
顯示於: | 生態學與演化生物學研究所 |
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