Genetic basis of high aroma and stress tolerance in the oolong tea cultivar genome

文献类型： 外文期刊

第一作者： Wang, Pengjie

作者： Wang, Pengjie;Jin, Shan;Yue, Chuan;Gao, Shuilian;Cao, Hongli;Zheng, Yucheng;Gu, Mengya;Chen, Xuejin;Sun, Yun;Guo, Yuqiong;Yang, Jiangfan;Ye, Naixing;Yu, Jiaxin;Chen, Shuai;Zhang, Xingtan;Yu, Jiaxin;Chen, Shuai;Wang, Wenling;Zhang, Xingtan

作者机构：

期刊名称：HORTICULTURE RESEARCH （ 影响因子：5.404； 五年影响因子：5.57 ）

ISSN： 2662-6810

年卷期： 2021 年 8 卷 1 期

页码：

收录情况： SCI

摘要： Tea plants (Camellia sinensis) are commercially cultivated in >60 countries, and their fresh leaves are processed into tea, which is the most widely consumed beverage in the world. Although several chromosome-level tea plant genomes have been published, they collapsed the two haplotypes and ignored a large number of allelic variations that may underlie important biological functions in this species. Here, we present a phased chromosome-scale assembly for an elite oolong tea cultivar, "Huangdan", that is well known for its high levels of aroma. Based on the two sets of haplotype genome data, we identified numerous genetic variations and a substantial proportion of allelic imbalance related to important traits, including aroma- and stress-related alleles. Comparative genomics revealed extensive structural variations as well as expansion of some gene families, such as terpene synthases (TPSs), that likely contribute to the high-aroma characteristics of the backbone parent, underlying the molecular basis for the biosynthesis of aroma-related chemicals in oolong tea. Our results uncovered the genetic basis of special features of this oolong tea cultivar, providing fundamental genomic resources to study evolution and domestication for the economically important tea crop.

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