摘要： 以美国厚皮甜瓜品系WI998为母本,中国薄皮甜瓜品系3-2-2为父本杂交所得的包括185个家系的重组自交系群体（RILs）为试验材料,通过RIL主基因+多基因混合遗传模型分析法,在不同季节研究第一雌花节位（NFF）的遗传特点。结果表明:春季性状遗传受2对重叠性主基因+加性-上位性多基因混合遗传模型（E_1_8）控制,主基因遗传率为79.17%,多基因遗传率分别为20.83%;秋季受2对互补性主基因+加性-上位性多基因混合遗传模型（E_1_7）控制,主基因遗传率为61.94%,多基因遗传率分36.77%。甜瓜第一雌花节位受2对主基因控制,还受环境变异的影响。

关键词: 甜瓜, 重组自交系群体, 第一雌花节位, 主基因+, 多基因遗传模型, 遗传

Abstract: Genetic analysis of melon node of the first female flower(NFF) were conducted with a set of 185 recombinant inbred lines(RILs) derived from a cross thick}kinned from USA WI998 and thin}kinned from China 322 by RIL mixed major gene plus polygene inheritance models. The result showed that the inheritance of NFF fitted two pairs of duplicate effect major genes plus additive-epitasis polygene model(E_1_8 ) in spring. The major gene heritability of RILs were estimated to be 79. 17%,the polygene heritability to be 20. 83 %.In autumn } the inheritance of NFF fitted two pairs of complementary effect major genes plus additive-epitasis polygene model (E_1_7).The major gene heritability of RILs were estimated to be 61 .94 %,the polygene heritability to be 36.77%.NFF in melon were controlled by two pairs of duplicate or complementary major genes plus additive-epitasis polygene,and also affected by environment.

Key words: Melon, Recombinant inbred lines, Node of the first female flower, Major genes plus poly}ene model, Genetic

中图分类号: 

• S652.03