关键词: 甜瓜, 果皮底色, 果皮覆纹, 果肉颜色, SNP 标记, 基因定位

Abstract: A Bin map of melon was constructed using a F2 population developed from a crossing the
melon inbred lines between‘K1-7’（green-yellow primary skin color，white flesh color and absence
secondary skin color）and‘K3-92-1’（yellow primary skin color，red-orange flesh color and absence
secondary skin color）. A genotyping method based on restriction named MSG was applied to genotype for
the F2 population，and then SNPs had been scaned in the genome-wide of melon. The Bin map included 44 722
SNPs，and then genetic analysis and gene maping had been done for primary skin color，secondary skin
color and flesh color. Genetic analysis showed that the primary skin color and flesh color is determined by a single gene separately，in addition，the character of green-yellow primary skin color and red-orange flesh
color is dominant inheritance. The genetic loci control of primary skin color was mapped on chromosome
4 of melon，narrowed the range of 409 828 bp to 835 625 bp（425 kb region），the genetic loci control of
flesh color was mapped on chromosome 9，narrowed the range of 20 433 942 bp to 20 573 889 bp（139 kb
region）. The genetic control of secondary skin color was found to be complex，involving two loci with
epistatic interactions. One of these loci was the same region as the genetic loci control of primary skin
color trait，the other gene loci was mapping on chromosome 2，narrowed the range of 23 736 803 bp to
23 787 235 bp（51 kb region）.

Key words: melon, primary skin color, secondary skin color, flesh color, SNP marker, gene mapping