1. Dipterocarpoidae genomics reveal their demography and adaptations to Asian rainforests
- Author
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Rong Wang, Chao-Nan Liu, Simon T. Segar, Yu-Ting Jiang, Kai-Jian Zhang, Kai Jiang, Gang Wang, Jing Cai, Lu-Fan Chen, Shan Chen, Jing Cheng, Stephen G. Compton, Jun-Yin Deng, Yuan-Yuan Ding, Fang K. Du, Xiao-Di Hu, Xing-Hua Hu, Ling Kang, Dong-Hai Li, Ling Lu, Yuan-Yuan Li, Liang Tang, Xin Tong, Zheng-Shi Wang, Wei-Wei Xu, Yang Yang, Run-Guo Zang, Zhuo-Xin Zu, Yuan-Ye Zhang, and Xiao-Yong Chen
- Subjects
Science - Abstract
Abstract Dipterocarpoideae species form the emergent layer of Asian rainforests. They are the indicator species for Asian rainforest distribution, but they are severely threatened. Here, to understand their adaptation and population decline, we assemble high-quality genomes of seven Dipterocarpoideae species including two autotetraploid species. We estimate the divergence time between Dipterocarpoideae and Malvaceae and within Dipterocarpoideae to be 108.2 (97.8‒118.2) and 88.4 (77.7‒102.9) million years ago, and we identify a whole genome duplication event preceding dipterocarp lineage diversification. We find several genes that showed a signature of selection, likely associated with the adaptation to Asian rainforests. By resequencing of two endangered species, we detect an expansion of effective population size after the last glacial period and a recent sharp decline coinciding with the history of local human activities. Our findings contribute to understanding the diversification and adaptation of dipterocarps and highlight anthropogenic disturbances as a major factor in their endangered status.
- Published
- 2024
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