%0 Journal Article %A LI Yu-hong %A WANG Zhou-fei %A GUAN Rong-zhan %A WANG Jian-fei %A ZHANG Hong-sheng %T Genetic Analyses on Nitrogen-Absorbing Ability and Nitrogen-Utilizing Efficiency of Rice at the Seedling Stage %D 2006 %R %J Chinese Journal OF Rice Science %P 379-383 %V 20 %N 4 %X

A RILs population consisting of 220 lines(F8) derived from the cross between rice variety Jiucaiqing(japonica) and IR26 (indica) was evaluated to analyze inheritance of nitrogen-absorbing(NA) ability and physiological use efficiency(NUE) at the seedling stage by using the major gene plus polygene mixed inheritance model.The NO3-absorbency,NH4+ absorbency and NUE of rice seedlings were genetically controlled by genetic mode of two major genes plus polygenes.The heritability values of major genes for NO3-absorbency,NH4+ absorbency and NUE were 63.20%,55.67% and 19.47%,respectively,and the values of polygene for the three traits were 20.64%,0.03% and 67.46%.There were additive and epistasis effects for the NO3-absorbency,epistasis effect for the NH4+ absorbency and cumulative effect for the NUE respectively between each two major genes.The strategy to breed new rice variety with high absorbing ability and use efficiency of nitrogen was discussed.

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