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Article|01 Jun 2019|OPEN
Cgr1, a ripe rot resistance QTL in Vitis amurensis ‘Shuang Hong’ grapevine
Peining Fu1,2 , Quanyou Tian2 , Gongti Lai1,2 and Rongfang Li2 , Shiren Song2 , , Jiang Lu,2 ,
1Viticulture and Enology Program, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
2Center for Viticulture and Enology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
*Corresponding author. E-mail: sr.song@sjtu.edu.cn,jiang.lu@sjtu.edu.cn

Horticulture Research 6,
Article number: 67 (2019)
doi: https://doi.org/10.1038/s41438-019-0148-0
Views: 978

Received: 20 Dec 2018
Revised: 04 Mar 2019
Accepted: 10 Mar 2019
Published online: 01 Jun 2019

Abstract

Ripe rot is a serious grapevine disease in Vitis L. and Muscadinia (Planch.) Small. However, resistance to this disease has been reported in some oriental Vitis species. To identify resistance-related Quantitative Trait Loci (QTLs) from the Chinese grape species V. amurensis, an F1 population of V. vinifera ‘Cabernet Sauvignon’ × V. amurensis ‘Shuang Hong’ was used to map the ripe rot resistance loci expected in ‘Shuang Hong’ grape. A total of 7598 single nucleotide polymorphisms (SNPs) between the parents were identified in our previous study, and 934 SNPs were selected for genetic map construction. These SNPs are distributed across the 19 chromosomes covering a total of 1665.31 cM in length, with an average of 1.81 cM between markers. Ripe rot resistance phenotypes among the hybrids were evaluated in vitro using excised leaves for three consecutive years from 2016 to 2018; a continuous variation was found among the F1 hybrids, and the Pearson correlation coefficients of the phenotypes scored in all three years were significant at the 0.01 level. Notably, the first QTL reported for resistance to grape ripe rot disease, named Cgr1, was identified on chromosome 14 of ‘Shuang Hong’ grapevine. Cgr1 could explain up to 19.90% of the phenotypic variance. In addition, a SNP named ‘np19345’ was identified as a molecular marker closely linked to the peak of Cgr1 and has the potential to be developed as a marker for the Cgr1 resistance haplotype.