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

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.