首页|Genomic evidence for evolutionary history and local adaptation of two endemic apricots:Prunus hongpingensis and P.zhengheensis

Genomic evidence for evolutionary history and local adaptation of two endemic apricots:Prunus hongpingensis and P.zhengheensis

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Apricot,belonging to the Armeniaca section of Rosaceae,is one of the economically important crop fruits that has been extensively cultivated.The natural wild apricots offer valuable genetic resources for crop improvement.However,some of them are endemic,with small populations,and are even at risk of extinction.In this study we unveil chromosome-level genome assemblies for two southern China endemic apricots,Prunus hongpingensis(PHP)and P.zhengheensis(PZH).We also characterize their evolutionary history and the genomic basis of their local adaptation using whole-genome resequencing data.Our findings reveal that PHP and PZH are closely related to Prunus armeniaca and form a distinct lineage.Both species experienced a decline in effective population size following the Last Glacial Maximum(LGM),which likely contributed to their current small population sizes.Despite the observed decrease in genetic diversity and heterozygosity,we do not observe an increased accumulation of deleterious mutations in these two endemic apricots.This is likely due to the combined effects of a low inbreeding coefficient and strong purifying selection.Furthermore,we identify a set of genes that have undergone positive selection and are associated with local environmental adaptation in PHP and PZH,respectively.These candidate genes can serve as valuable genetic resources for targeted breeding and improvement of cultivated apricots.Overall,our study not only enriches our comprehension of the evolutionary history of apricot species but also offers crucial insights for the conservation and future breeding of other endemic species amidst rapid climate changes.

Xiaokang Dai、Songzhu Xiang、Yulin Zhang、Siting Yang、Qianqian Hu、Zhihao Wu、Tingting Zhou、Jingsong Xiang、Gongyou Chen、Xiaohua Tan、Jing Wang、Jihua Ding

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National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops,College of Horticulture and Forestry Sciences,Hubei Hongshan Laboratory,Hubei Engineering Technology Research Center for Forestry Information,Huazhong Agricultural University,430070,Wuhan,Hubei,China

Shennongjia Academy of Forestry,442499,Shennongjia Forestry District,Hubei,China

Key Laboratory for Bio-Resources and Eco-Environment of Ministry of Education,College of Life Sciences,Sichuan University,610065,Chengdu,Sichuan,China

Science and Technology Projects of Shennongjia Academy of Forestry国家自然科学基金国家自然科学基金中央高校基本科研业务费专项

SAF20210432271824319716762662019PY007

2024

10.1093/hr/uhad215

园艺研究(英文)

园艺研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.11(4)
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