Genome-wide association studies provide insights into the genetic determination of fruit traits of pear

Ming-Yue Zhang, Cheng Xue, Hongju Hu, Jiaming Li, Yongsong Xue, Runze Wang, Jing Fan, Cheng Zou, Shutian Tao, Mengfan Qin, Bing Bai, Xiaolong Li, Chao Gu, Shan Wu, Xu Chen, Guangyan Yang, Yueyuan Liu, Manyi Sun, Zhangjun Fei (), Shaoling Zhang () and Jun Wu ()
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Ming-Yue Zhang: Nanjing Agricultural University
Cheng Xue: Nanjing Agricultural University
Hongju Hu: Wuchang Sand Pear Germplasm, Hubei Academy of Agricultural Sciences
Jiaming Li: Nanjing Agricultural University
Yongsong Xue: Nanjing Agricultural University
Runze Wang: Nanjing Agricultural University
Jing Fan: Wuchang Sand Pear Germplasm, Hubei Academy of Agricultural Sciences
Cheng Zou: Institute of Crop Sciences, Chinese Academy of Agricultural Sciences
Shutian Tao: Nanjing Agricultural University
Mengfan Qin: Nanjing Agricultural University
Bing Bai: Nanjing Agricultural University
Xiaolong Li: Nanjing Agricultural University
Chao Gu: Nanjing Agricultural University
Shan Wu: Cornell University
Xu Chen: Fujian Agriculture and Forestry University
Guangyan Yang: Nanjing Agricultural University
Yueyuan Liu: Nanjing Agricultural University
Manyi Sun: Nanjing Agricultural University
Zhangjun Fei: Cornell University
Shaoling Zhang: Nanjing Agricultural University
Jun Wu: Nanjing Agricultural University

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract Pear is a major fruit tree crop distributed worldwide, yet its breeding is a very time-consuming process. To facilitate molecular breeding and gene identification, here we have performed genome-wide association studies (GWAS) on eleven fruit traits. We identify 37 loci associated with eight fruit quality traits and five loci associated with three fruit phenological traits. Scans for selective sweeps indicate that traits including fruit stone cell content, organic acid and sugar contents might have been under continuous selection during breeding improvement. One candidate gene, PbrSTONE, identified in GWAS, has been functionally verified to be involved in the regulation of stone cell formation, one of the most important fruit quality traits in pear. Our study provides insights into the complex fruit related biology and identifies genes controlling important traits in pear through GWAS, which extends the genetic resources and basis for facilitating molecular breeding in perennial trees.

Date: 2021
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DOI: 10.1038/s41467-021-21378-y

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