Genetic analysis on mixed model of major gene plus polygenes inheritance for fertility restoring gene of AL-type hybrid wheats.

[Objective]The main purpose of this paper was set to study the genetic model of fertility restoring gene of AL-type hybrid wheats.[Method]In the study,the parents and the breeding generations from the cross of AL-type’s restorer line and sterile line were obtained from our wheat breeding programe,2 parents (P1 andP2) and 2 breeding generations(F1andF2)from the cross AL18A × 99AR144-1,fertility inheritance were investigated by the mixed model of major gene plus polygenes for quantitative traits.[Result]Results showed that the genetic model E-1 was the most suitable one for the fertility restoring gene of AL-type hybrid wheats.The fertility was controlled by two additive-dominance-epitasis major genes plus additive-dominance polygenes.Major-gene heritability was 85.92%.[Conclusion]The fertility restoring gene of AL-type male sterility hybrid wheats was controlled by two additive-dominance-epitasis major genes plus additive-dominance polygenes.The heritability of major gene was high and it would have high utilization value in hybrid wheats breeding programe.