粳稻BIL群体11个稻米品质性状的主基因+多基因遗传分析OA

[Objective]To elucidate the genetic basis of 11 rice quality traits in japonica rice.[Method]A backcross inbred line(BIL)pop-ulation derived from Wuyunjing 7/Zhendao 88//Wuyunjing 7,comprising 104 lines along with the two parental lines,was used.Eleven rice quality traits were evaluated in Lujiang base(E1)and Lingshui base(E2).Correlation analysis among the traits was conducted,and genetic a-nalysis was performed using the major gene plus polygene mixed inheritance model.[Result]The brown rice ratio,milled rice ratio and head rice ratio were controlled by two pairs of major genes and showed additive effects;the grain length,length-width ratio,chalkiness and gel con-sistency were controlled by four pairs of major genes and exhibited epistatic effects except for gel consistency in E2,which was controlled by three pairs of major genes and showed equal additive effect.Grain width was controlled by four pairs of major genes in E1;the chalky grain ra-tio,gelatinization temperature and amylose content were controlled by three pairs of major genes;grain width and amylose content were con-trolled by two pairs of major genes in E2;and the chalky grain ratio and gelatinization temperature were controlled by four pairs of major genes.All 11 traits were predominantly controlled by major genes.[Conclusion]11 rice quality traits are controlled by major genes,but the number of major genes and their modes of action vary across traits and environments.