Abstract:

Two hundred and fifty-nine RILs were developed from the cross between a dent corn inbred D232 and a popcorn inbred N04. The variation of 4 nutritional quality traits at different stages were analyzed, including crude protein (CP), crude starch (CT), crude fat (CF) and crude lysine (LS). The results showed that there were obvious segregations beyond the two parents for all nutritional quality traits among RILs. For parents, F1 and RILs population, CP, CF, and LS were continuously decreasing from 10 DAP to 30 DAP, only slight difference of the decreasing range were observed. However, the content increased differently at late grain filling stage. For CT, there was consistent increase during the whole growth stages. All traits showed normal distributions. Except correlations for CP at 10DAP with 40DAP and CF at 10DAP with 30DAP, other nutritional quality traits at different stages were significant or highly significant positivly correlated. CT was highly negativly correlated with CP, CF and LS at four stages, the other traits were all highly positivly correlated.