利用重组自交系(RILs)群体进行甜瓜第一雌花节位主基因+多基因混合遗传模型分析

Genetic Analysis of the Node of the First Female Flower in Melon with Major Gene Plus Polygene Mixed Genetic Model by Using of Recombinant Inbred Lines( RILs) Population

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。

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-skinned from USA WI998 and thin-skinned from China 3-2-2 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.