Articles

CONSTRUCTION OF GENETIC LINKAGE MAP AND LOCALIZATION OF QTLS FOR POWDERY MILDEW RESISTANCE IN CUCUMBER (CUCUMIS SATIVUS L.)

Article number
871_2
Pages
33 – 42
Language
English
Abstract
Based on a population of 188 F2 family derived from a cross of the cultivar D8 (susceptible to powdery mildew) and JIN5 (resistant to powdery mildew) of cucumber, a genetic linkage map was constructed and mapped QTLs related to the powdery mildew.
In this map, a total of 65 markers including ISSR and SRAP markers were clustered into 7 major linkage groups, spanning a total of 831.6 cM, with an average distance of 12.7 cM. The minimum distance of markers intervals is 4.8 cM, and the maximum is 22.3 cM. The association of genetic markers and cucumber powdery mildew resistance was investigated.
By using of composite interval-mapping approach, two QTLs associated with powdery mildew resistance were found, which located on the third linkage group, and they explained 7.6 and 13.5% of the trait variation, respectively.
The results are useful for the marker assisted selection for the resistance of cucumber powdery mildew.

Publication
Authors
Mouammar Alfandi, Yi Ji, Liping Shen, Xiaohua Qi, Qiang Xu, Xuehao Chen
Keywords
cucumber, ISSR, SRAP, genetic linkage map, QTLs mapping
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