Identification of the LH2 Locus for Prostrate Hair Density in Grapevine
2024
Bohan Yang | Jiaqi Liu | Qinqin Gu | Zhizhuo Xu | Xiukun Yao | Jianxiang Liang | Menghao Xu | Jiang Lu | Peining Fu
Prostrate hairs are one of the anatomic barriers for grapevine resistance to pests and diseases, as well as in environmental adaptability, making them valuable for breeding programs. This study investigates the genetic determinants underlying prostrate hair density in grapevine, a key trait associated with resistance to pests and pathogens. Using an F1 hybrid population derived from Vitis vinifera L. ‘Cabernet Sauvignon cv.’ and V. pseudoreticulata W.T.Wang ‘Huadong1058’, we performed a combination of quantitative trait locus (QTL) mapping and genome-wide association study (GWAS) to identify the genomic regions influencing the density of prostrate hair. We identified a major locus on 9.56–10.54 Mbp of chromosome 17, designated as ‘LH2’, which accounts for 43% of the phenotypic variation. This locus was delineated with high precision, and 92 candidate genes were identified within the region. Functional enrichment analysis suggested that these genes are potentially involved in binding, catalytic activity, and various cellular processes. In particular, the SNP markers ‘chr17_10130288’ and ‘chr17_10428273’ were significantly associated with prostrate hair density, providing valuable information for marker-assisted selection. These findings offer a reliable target for analyzing the hair development mechanism of grapevine leaves and breeding new cultivars rich in prostrate hair on the back of the leaves.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Multidisciplinary Digital Publishing Institute