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| QTL Analysis of Melon Stigma Color |
| GUO Yu，GUO Hai-yan，LUO Lan，LIU Shi，GAO Ye，ZHANG Tai-feng，LUAN Fei-shi，WANG Xue-zheng* |
| College of Horticulture and Landscape Architecture，Northeast Agricultural University，Harbin 150030，Heilongjiang，China |
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Abstract In this experiment，200 F2 populations were obtained from green stigma melon ‘MR-1’and yellow stigma melon ‘TN’ as parents，and based on resequencing the SNP-CAPS markers and BSA technology were developed for construction of the molecular map．A genetic linkage map containing 12 linkage groups and 135 CAPS markers was constructed，covering a genome length of 2 731.97 cM．QTL analysis was conducted on the related characters of melon stigma color（yellow or green） by this map．Twelve QTLs related to stigma color were obtained．There were 4 QTLs related to stigma total chlorophyll content，3 QTLs related to stigma carotenoid content，2 QTLs related to stigma color card，and 3 QTLs related to the ratio of stigma total chlorophyll content to stigma carotenoid content，distributing in 1，2，4，5，7，8，11，12 on the linkage group，explaining 4.63%-20.44% phenotypic variation．The main effect sites regulating stigma total chlorophyll content，stigma carotenoid content and stigma color card were SChC-1-1，SCaC-12-1and SCoC-2-1．Their contribution rates were 18.78%，12.08%，20.44%，respectively．
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Received: 21 August 2019
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