The potato R10 resistance specificity to late blight is conferred by both a single dominant R gene and quantitative trait loci

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 Phytophthora infestans isolates, using a detached leaf assay. Progeny differed in resp...

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Published in:Plant breeding Vol. 132; no. 4; pp. 407 - 412
Main Authors: Xu, Jianfei, Wang, Jiajia, Pang, Wanfu, Bian, Chunsong, Duan, Shaoguang, Liu, Jie, Huang, Sanwen, Jin, Liping, Qu, Dongyu
Format: Journal Article
Language:English
Published: Berlin Blackwell Publishing Ltd 01.08.2013
Wiley Subscription Services, Inc
Subjects:
Cultivars
field resistance
Gene mapping
genetic mapping
late blight
Phytophthora infestans
potato
Potatoes
R10
Solanum tuberosum
Statistical analysis
ISSN:0179-9541, 1439-0523
Online Access:Get full text
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Summary: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 Phytophthora 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 R10 in this study. Statistical analysis revealed that one of the resistance QTLs to isolates IPO‐0 and 99018 is linked to the R10 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 R10 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 R10 with resistance QTLs could explain the field resistance observed with 3681ad1.
Bibliography:National Natural Science Foundation of China - No. 30671319; No. 31000738
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ark:/67375/WNG-GJZ1S0DJ-1
ArticleID:PBR12075
Key Laboratory of Biology and Genetic Improvement of Tuber and Root Crops
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ISSN:0179-9541
1439-0523
DOI:10.1111/pbr.12075