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

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

机构地区：[1]Zhengzhou Fruit Research Institute,CAAS,Zhengzhou,Hennan 450009,China [2]Xinjiang Academy of Agricultural Sciences,Urumqi,Xinjiang 830091,China [3]Western Research Institute,CAAS,Changji,Xinjiang 831100,China

出　　处：《Horticultural Plant Journal》2024年第2期367-375,共9页园艺学报（英文版）

基　　金：supported by the National Key Research and Development Program (Grant Nos2019YFD1000200,2021YFD1200200);Agricultural Science and Technology Innovation Program (Grant No.CAAS-ASTIP-2021-ZFRI-01);the Crop Germplasm Resources Conservation Project(Grant No.2016NWB041);the National Horticulture Germplasm Resources Center。

摘　　要：Peach, an economically important model plant of the Rosaceae family, has been domesticated and cultivated in China for approximately5 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 accessions 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 understanding 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.

关 键 词：PEACH Hexi corridor Tarim Basin Genetic diversity Gene flow 

分 类 号：S662.1[农业科学—果树学]