Genetic Analysis of Flowering Stage of the First Female Flower of Recombinant Inbred Lines in Melon
GAO Mei-ling1，LUAN Fei-shi2，ZHU Zi-cheng2
1 College of Life Science，Agriculture and Forest，The Key Lab of Genetic Engineering，Qiqihaer University，Qiqihaer 161006，Heilongjiang，China；2Horticulture College，Northeast Agricultural University，Harbin 150030，Heilongjiang，China
Abstract：A set of 185 recombinant inbred lines（RIL）derived from crossing thick-skinned melon（Cucumis melo L.）from USA‘WI998’（P1）and thin-skinned melon from China‘3-2-2’（P2）was taken as experimental material．The genetic characteristics of first female flower（DFF）at different seasons were studied by RIL mixed major gene + polygene inheritance models．The results showed that the DFF was controlled by 2 pairs of duplicate major genes + additive dominant polygene model（E_1_8）．In spring，the major gene heritability is 77.05%，and the polygene heritability is 22.44%．The major gene heritability is 72.38%，and the polygene heritability is 27.52% in autumn．These results indicated that the heritability of major genes was larger than that of polygene in melon DFF，and DFF was mainly governed by the major gene，and its heritability was stable in different seasons．
