首页|Genomic analysis provides insights into the westward expansion of domesticated peaches in China

Genomic analysis provides insights into the westward expansion of domesticated peaches in China

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Peach,an economically important model plant of the Rosaceae family,has been domesticated and cultivated in China for approximately 5 000 years.The Hexi Corridor,an important corridor connecting east-central China and the Tarim Basin,is the starting point of the Silk Road that links China and the Eurasian region.As a globally distributed fruit tree,the spread of peach was accomplished through historical trade routes in the Hexi Corridor and the Tarim Basin.However,knowledge of peach genetic diversity in these regions remains limited.In this study,we examined the relationships and the spread history of domesticated peaches through sequencing and genomic analysis of 161 peach ac-cessions collected from Northwest China,including 43 from the Hexi Corridor and 104 from the Tarim Basin.The results indicate that peach landraces in the Hexi Corridor and the Tarim Basin are derivatives of peaches from the east and south of China(ESC).Notably,the genetic diversity of accessions from both the Hexi Corridor and the Tarim Basin was lower than that of ESC accessions.Reduction of diversity(ROD)and linkage disequilibrium(LD)analyses detected a genetic bottleneck in peaches from these regions.Additionally,these peaches have undergone varying degrees of selection from natural environment.Moreover,genes responsive to biotic and abiotic stresses were under selection,which could be the result of the climate change of Northwest China after the Last Glacial Maximum(LGM).Our findings provide a better under-standing of the genetic basis of peach migration in Northwest China.Furthermore,this study expands the available genomic data for peaches and provides critical information for future peach breeding programs.

PeachHexi corridorTarim BasinGenetic diversityGene flow

Wenqing Li、Yong Li、Xinwei Wang、Guoqing Zhao、Gengrui Zhu、Ke Cao、Weichao Fang、Jinlong Wu、Kai Ma、Changwen Chen、Lirong Wang

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Zhengzhou Fruit Research Institute,CAAS,Zhengzhou,Hennan 450009,China

Western Research Institute,CAAS,Changji,Xinjiang 831100,China

Xinjiang Academy of Agricultural Sciences,Urumqi,Xinjiang 830091,China

国家重点研发计划国家重点研发计划Agricultural Science and Technology Innovation ProgramCrop Germplasm Resources Conservation ProjectNational Horticulture Germplasm Resources Center

2019YFD10002002021YFD1200200CAAS-ASTIP-2021-ZFRI-012016NWB041

2024

10.1016/j.hpj.2022.07.009

园艺学报(英文版)

园艺学报(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.10(2)
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