Genome sequencing sheds light on the contribution of structural variants to Brassica oleracea diversification
文献类型： 外文期刊
作者： Guo, Ning 1 ; Wang, Shenyun 2 ; Gao, Lei 3 ; Liu, Yongming 5 ; Wang, Xin 3 ; Lai, Enhui 4 ; Duan, Mengmeng 1 ; Wang, Guix 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Vegetables, Key Lab Biol & Genet Improvement Hort Crops North, Beijing Key Lab Vegetable Germplasm Improvement, Beijing 100097, Peoples R China
2.Jiangsu Acad Agr Sci, Jiangsu Key Lab Hort Crop Genet Improvement, Inst Vegetable Crops, Nanjing 210014, Peoples R China
3.Boyce Thompson Inst Plant Res, Ithaca, NY 14853 USA
4.Chinese Acad Sci, CAS Key Lab Plant Germplasm Enhancement & Special, Wuhan Bot Garden, Innovat Acad Seed Design, Wuhan 430074, Peoples R China
5.Next Biosci Inst, Wuhan 430074, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Wageningen Univ & Res, Plant Breeding, NL-6708 PB Wageningen, Netherlands
8.Tianjin GengYun Seed Co, Tianjin 300400, Peoples R China
9.Fuzhou Inst Vegetable Sci, Fuzhou 350012, Peoples R China
10.ARS, USDA, Robert W Holley Ctr Agr & Hlth, Ithaca, NY 14853 USA
关键词： Brassica oleracea; Cauliflower; Cabbage; Structural variants; Curd development
期刊名称：BMC BIOLOGY （ 影响因子：7.431； 五年影响因子：8.182 ）
ISSN：
年卷期： 2021 年 19 卷 1 期
页码：
收录情况： SCI
摘要： Background: Brassica oleracea includes several morphologically diverse, economically important vegetable crops, such as the cauliflower and cabbage. However, genetic variants, especially large structural variants (SVs), that underlie the extreme morphological diversity of B. oleracea remain largely unexplored. Results: Here we present high-quality chromosome-scale genome assemblies for two B. oleracea morphotypes, cauliflower and cabbage. Direct comparison of these two assemblies identifies similar to 120 K high-confidence SVs. Population analysis of 271 B. oleracea accessions using these SVs clearly separates different morphotypes, suggesting the association of SVs with B. oleracea intraspecific divergence. Genes affected by SVs selected between cauliflower and cabbage are enriched with functions related to response to stress and stimulus and meristem and flower development. Furthermore, genes affected by selected SVs and involved in the switch from vegetative to generative growth that defines curd initiation, inflorescence meristem proliferation for curd formation, maintenance and enlargement, are identified, providing insights into the regulatory network of curd development. Conclusions: This study reveals the important roles of SVs in diversification of different morphotypes of B. oleracea, and the newly assembled genomes and the SVs provide rich resources for future research and breeding.
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