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Multiple-statistical genome-wide association analysis and genomic prediction of fruit aroma and agronomic traits in peaches

文献类型： 外文期刊

作者： Li, Xiongwei 1 ; Wang, Jiabo 2 ; Su, Mingshen 1 ; Zhang, Minghao 1 ; Hu, Yang 1 ; Du, Jihong 1 ; Zhou, Huijuan 1 ; Yang, Xiaofeng 3 ; Zhang, Xianan 1 ; Jia, Huijuan 4 ; Gao, Zhongshan 4 ; Ye, Zhengwen 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Peach Res Dept Forest & Fruit Tree Inst, Shanghai 201403, Peoples R China

2.Southwest Minzu Univ, Key Lab Qinghai Tibetan Plateau Anim Genet Resourc, Minist Educ, Chengdu 610041, Sichuan, Peoples R China

3.Shanghai Runzhuang Agr Sci & Technol Inst, Peach Grp, Shanghai 201415, Peoples R China

4.Zhejiang Univ, State Agr Minist, Dept Hort, Key Lab Hort Plant Growth Dev & Qual Improvement, Hangzhou 310058, Peoples R China

期刊名称：HORTICULTURE RESEARCH （ 影响因子：8.7； 五年影响因子：9.0 ）

ISSN： 2662-6810

年卷期： 2023 年 10 卷 7 期

页码：

收录情况： SCI

摘要： 'Chinese Cling' is an important founder in peach breeding history due to the pleasant flavor. Genome-wide association studies (GWAS) combined with genomic selection are promising tools in fruit tree breeding, as there is a considerable time lapse between crossing and release of a cultivar. In this study, 242 peaches from Shanghai germplasm were genotyped with 145 456 single-nucleotide polymorphisms (SNPs). The six agronomic traits of fruit flesh color, fruit shape, fruit hairiness, flower type, pollen sterility, and soluble solids content, along with 14 key volatile odor compounds (VOCs), were recorded for multiple-statistical GWAS. Except the reported candidate genes, six novel genes were identified as associated with these traits. Thirty-nine significant SNPs were associated with eight VOCs. The putative candidate genes were confirmed for VOCs by RNA-seq, including three genes in the biosynthesis pathway found to be associated with linalool, soluble solids content, and cis-3-hexenyl acetate. Multiple-trait genomic prediction enhanced the predictive ability for & gamma;-decalactone to 0.7415 compared with the single-trait model value of 0.1017. One PTS1-SSR marker was designed to predict the linalool content, and the favorable genotype 187/187 was confirmed, mainly existing in the 'Shanghai Shuimi' landrace. Overall, our findings will be helpful in determining peach accessions with the ideal phenotype and show the potential of multiple-trait genomic prediction to improve accuracy for highly correlated genetic traits. The diagnostic marker will be valuable for the breeder to bridge the gap between quantitative trait loci and marker-assisted selection for developing strong-aroma cultivars.

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