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Chromosome-level genome assembly of the diploid blueberry Vaccinium darrowii provides insights into its subtropical adaptation and cuticle synthesis

文献类型: 外文期刊

作者: Cui, Fuqiang 1 ; Ye, Xiaoxue 2 ; Li, Xiaoxiao 1 ; Yang, Yifan 1 ; Hu, Zhubing 7 ; Overmyer, Kirk 4 ; Brosche, Mikael 4 ; Yu, Hong 6 ; Salojarvi, Jarkko 3 ;

作者机构: 1.Zhejiang A&F Univ, Coll Forestry & Biotechnol, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Hainan, Peoples R China

3.Nanyang Technol Univ, Sch Biol Sci, Singapore, Singapore

4.Univ Helsinki, Organismal & Evolutionary Biol Res Program, Fac Biol & Environm Sci, POB 65,Viikinkaari 1, Helsinki 00014, Finland

5.Univ Helsinki, Viikki Plant Sci Ctr, POB 65,Viikinkaari 1, Helsinki 00014, Finland

6.Jiangsu Prov & Chinese Acad Sci, Inst Bot, Nanjing, Peoples R China

7.Henan Univ, Inst Plant Stress Biol, Dept Biol, State Key Lab Cotton Biol, Kaifeng, Peoples R China

关键词: Vaccinium darrowii; blueberry; genome sequence; cuticle; subtropical; adaptation

期刊名称:PLANT COMMUNICATIONS ( 影响因子:8.625; 五年影响因子:8.625 )

ISSN: 2590-3462

年卷期: 2022 年 3 卷 4 期

页码:

收录情况: SCI

摘要: Vaccinium darrowii is a subtropical wild blueberry species that has been used to breed economically important southern highbush cultivars. The adaptive traits of V. darrowii to subtropical climates can provide valuable information for breeding blueberry and perhaps other plants, especially against the background of global warming. Here, we assembled the V. darrowii genome into 12 pseudochromosomes using Oxford Nanopore long reads complemented with Hi-C scaffolding technologies, and we predicted 41 815 genes using RNA-sequencing evidence. Syntenic analysis across three Vaccinium species revealed a highly conserved genome structure, with the highest collinearity between V. darrowii and Vaccinium corymbosum. This conserved genome structure may explain the high fertility observed during crossbreeding of V. darrowii with other blueberry cultivars. Analysis of gene expansion and tandem duplication indicated possible roles for defense- and flowering-associated genes in the adaptation of V. darrowii to the subtropics. Putative SOC1 genes in V. darrowii were identified based on phylogeny and expression analysis. Blueberries are covered in a thick cuticle layer and contain anthocyanins, which confer their powdery blue color. Using RNA sequencing, we delineated the cuticle biosynthesis pathways of Vaccinium species in V. darrowii. This result can serve as a reference for breeding berries whose colors are appealing to customers. The V. darrowii reference genome, together with the unique traits of this species, including its diploid genome, short vegetative phase, and high compatibility in hybridization with other blueberries, make V. darrowii a potential research model for blueberry species.

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