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Comparative Genome Analysis of Scutellaria baicalensis and Scutellaria barbata Reveals the evolution of Active Flavonoid Biosynthesis

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Genomics, Proteomics & Bioinformatics 2020年第3期18卷 230-240页

作者： Zhichao Xu Ranran Gao Xiangdong Pu Rong Xu Jiyong Wang Sihao Zheng Yan Zeng Jun Chen Chunnian He Jingyuan Song Key Lab of Chinese Medicine Resources Conservation State Administration of Traditional Chinese Medicine of ChinaInstitute of Medicinal Plant DevelopmentChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100193China Engineering Research Center of Chinese Medicine Resource Ministry of EducationBeijing 100193China China National Traditional Chinese Medicine Co. LtdBeijing 102600China

Scutellaria baicalensis(***)and Scutellaria barbata(***)are common medicinal plants of the Lamiaceae *** produce specific flavonoid compounds,including baicalein,scutellarein,norwogonin,and wogonin,as well as their glycosides,which exhibit antioxidant and antitumor ***,we report chromosome-level genome assemblies of *** and *** with quantitative chromosomal variation(2 n=18 and 2 n=26,respectively).The divergence of *** and *** occurred far earlier than previously reported,and a whole-genome duplication(WGD)event was *** insertion of long terminal repeat elements after speciation might be responsible for the observed chromosomal expansion and *** genome analysis of the congeneric species revealed the species-specific evolution of chrysin and apigenin biosynthetic genes,such as the ***-specific tandem duplication of genes encoding phenylalanine ammonia lyase and chalcone synthase,and the ***-specific duplication of genes encoding 4-Co A *** addition,the paralogous duplication,colinearity,and expression diversity of CYP82 D subfamily members revealed the functional divergence of genes encoding flavone hydroxylase between *** and *** these Scutellaria genomes reveals the common and species-specific evolution of flavone biosynthetic ***,these findings would facilitate the development of molecular breeding and studies of biosynthesis and regulation of bioactive compounds.

关键词： Scutellaria Whole-genome duplication Flavonoid biosynthesis Tandem duplication species-specific evolution

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