Whole-genome resequencing of wild and cultivated cannabis reveals the genetic structure and adaptive selection of important traits

文献类型： 外文期刊

第一作者： Chen, Xuan

作者： Chen, Xuan;Guo, Hong-Yan;Zhang, Qing-Ying;Guo, Rong;Lv, Pin;Xu, Yan-Ping;Guo, Meng-Bi;Zhang, Yuan;Zhang, Kun;Yang, Ming;Wang, Lu;Zhan, Yi-Xun;Liu, Yan-Hu

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关键词： Cannabis; Wild; Cultivated; Whole-genome resequencing; Genetic structure; Flowering

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）

ISSN： 1471-2229

年卷期： 2022 年 22 卷 1 期

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收录情况： SCI

摘要： Background Cannabis is an important industrial crop species whose fibre, seeds, flowers and leaves are widely used by humans. The study of cannabinoids extracted from plants has been popular research topic in recent years. China is one of the origins of cannabis and one of the few countries with wild cannabis plants. However, the genetic structure of Chinese cannabis and the degree of adaptive selection remain unclear. Results The main morphological characteristics of wild cannabis in China were assessed. Based on whole-genome resequencing SNPs, Chinese cannabis could be divided into five groups in terms of geographical source and ecotype: wild accessions growing in the northwestern region; wild accessions growing in the northeastern region; cultivated accessions grown for fibre in the northeastern region; cultivated accessions grown for seed in northwestern region, and cultivated accessions in southwestern region. We further identified genes related to flowering time, seed germination, seed size, embryogenesis, growth, and stress responses selected during the process of cannabis domestication. The expression of flowering-related genes under long-day (LD) and short-day (SD) conditions showed that Chinese cultivated cannabis is adapted to different photoperiods through the regulation of Flowering locus T-like (FT-like) expression. Conclusion This study clarifies the genetic structure of Chinese cannabis and offers valuable genomic resources for cannabis breeding.

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