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Genetic and epigenetic signatures for improved breeding of cultivated blueberry

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Blueberry belongs to the Vaccinium genus and is a highly popular fruit crop with significant economic importance.It was not until the early twentieth century that they began to be domesticated through extensive interspecific hybridization.Here,we collected 220 Vaccinium accessions from various geographical locations,including 154 from the United States,14 from China,eight from Australia,and 29 from Europe and other countries,comprising 164 Vaccinium corymbosum,15 Vaccinium ashei,10 lowbush blueberries,seven half-high blueberries,and others.We present the whole-genome variation map of 220 accessions and reconstructed the hundred-year molecular history of interspecific hybridization of blueberry.We focused on the two major blueberry subgroups,the northern highbush blueberry(NHB)and southern highbush blueberry(SHB)and identified candidate genes that contribute to their distinct traits in climate adaptability and fruit quality.Our analysis unveiled the role of gene introgression from Vaccinium darrowii and V.ashei into SHB in driving the differentiation between SHB and NHB,potentially facilitating SHB's adaptation to subtropical environments.Assisted by genome-wide association studies,our analysis suggested VcTBL44 as a pivotal gene regulator governing fruit firmness in SHB.Additionally,we conducted whole-genome bisulfite sequencing on nine NHB and 12 SHB cultivars,and characterized regions that are differentially methylated between the two subgroups.In particular,we discovered that the β-alanine metabolic pathway genes were enriched for DNA methylation changes.Our study provides high-quality genetic and epigenetic variation maps for blueberry,which offer valuable insights and resources for future blueberry breeding.

Zejia Wang、Wanchen Zhang、Yangyan Zhou、Qiyan Zhang、Krishnanand P.Kulkarni、Kalpalatha Melmaiee、Youwen Tian、Mei Dong、Zhaoxu Gao、Yanning Su、Hong Yu、Guohui Xu、Yadong Li、Hang He、Qikun Liu、Haiyue Sun

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State Key Laboratory of Protein and Plant Gene Research,School of Advanced Agricultural Sciences,Peking University,No.5 Yiheyuan Road,Haidian District,Beijing 100871,China

Jilin Provincial Laboratory of Crop Germplasm Resources,College of Horticulture,Jilin Agricultural University,No.2888 Xincheng Street,Economic Development District,Changchun 130118,China

Department of Agriculture and Natural Resources,Delaware State University,Dover,DE 19901,USA

Institute of Botany,Jiangsu Province and Chinese Academy of Sciences,Nanjing 210014,China

College of Life and Health,Dalian University,Dalian 116622,China

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2024

10.1093/hr/uhae138

园艺研究(英文)

园艺研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.11(7)