Abstract：A recombinant inbred lines（RILs） mapping population of melon（Cucumis melo L.）
comprising 124 F6：7 families was developed from crossing the thick-skin netted melon line WI998
as female parent and thin-skin melon line 3-2-2 as male parent through single-seed descent. This
RILs population was used to construct a linkage map with microsatellite（ simple sequence repeat，
SSR） markers．Screening from 608 SSR markers 150 pairs of primers（24.67%）were detected
to be polymorplic between the 2 parental lines．This map contained 17 linkage groups spanning
1 246.67 cM with a mean marker interval of 9.59 cM．Composite interval mapping method was
used to detect QTLs of traits involved in melon fruit：fruit weight（ Fw），fruit firmness（ Ff），fruit
length（ Fl），flesh thickness（ Ft） and fruit shape index（ Fsi）．Total 15 QTLs of fruit were detected
and mapped on linkage groups 1，4，5，6，8，10，13，14，15，17，respectively. Among them，
8 QTLs had contribution rate over 10%. QTL Ff13.2 located at the 13th linkage group had the largest
contribution rate 26.45%．Marker ECM87 was located in the same site with Fsi8.2，and marker
CM33 was close linkage with Fsi15.1，the genetic distance is 0.6 cM．
