甜瓜重组自交系群体第1雌花开花期遗传分析

以美国早花厚皮甜瓜品系WI998为母本（P1），中国晚花薄皮甜瓜品系3-2-2为父本（P2）杂交所得的包括185个家系的重组自交系（RIL）群体为试验材料，通过RIL群体主基因+多基因混合遗传模型分析法，研究不同季节第1雌花开花期（DFF）的遗传特点。结果表明：春秋两季第1雌花开花期遗传均受2对重叠性主基因+加性多基因模型（E_1_8）控制，春季主基因遗传率为77.05%，多基因遗传率为22.44%；秋季主基因遗传率为72.38%，多基因遗传率为27.52%。表明甜瓜DFF主基因遗传力大于多基因遗传力，DFF主要受主基因控制，并在不同季节遗传稳定。

Genetic Analysis of Flowering Stage of the First Female Flower of Recombinant Inbred Lines in Melon

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．