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The potato R10 resistance specificity to late blight is conferred by both a single dominant R gene and quantitative trait loci
Author(s) -
Xu Jianfei,
Wang Jiajia,
Pang Wanfu,
Bian Chunsong,
Duan Shaoguang,
Liu Jie,
Huang Sanwen,
Jin Liping,
Qu Dongyu
Publication year - 2013
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12075
Subject(s) - biology , quantitative trait locus , blight , genetics , locus (genetics) , major gene , population , phytophthora infestans , gene , botany , demography , sociology
The R10 late blight differential of potato, 3681ad1, exhibits good field resistance. Progeny from the cross between 3681ad1 and the susceptible cultivar ‘Katahdin’ were assessed for late blight resistance to three P hytophthora infestans isolates, using a detached leaf assay. Progeny differed in response to the three isolates. Resistance to isolates IPO‐0 and 99018 was controlled by quantitative trait loci (QTL), whereas resistance to isolate 89148‐9 was inherited as a dominant R gene, designated as R 10 in this study. Statistical analysis revealed that one of the resistance QTL s to isolates IPO ‐0 and 99018 is linked to the R 10 gene, which maps to chromosome 11 in a region where a complex late blight resistance locus has been reported previously. A high‐resolution map of R 10 was constructed using a large segregating population, and the gene was delimited to a genetic interval of 0.26 cM. The clustering of the qualitative gene R 10 with resistance QTL s could explain the field resistance observed with 3681ad1.