Inheritance of Male Fertility in YM-type Thermo-sensitive Male Sterile Wheat Line ATM3314

Two-line hybrid wheat system is an important way to use heterosis in wheat.To reveal the inheritance of male fertility in thermo-sensitive male sterile(TMS) wheat lines is important for the breeding of TMS wheat line and application of two-line hybrid wheat theoretically and practically.In this study,the inheritance of male fertility in TMS wheat line was investigated by using 4 generations joint analysis method of mixed major gene plus polygene mixed inheritance model based on the fertility data of the P1,P2,F1 and F2 populations from the cross between YM-type TMS wheat line ATM3314 and restorer line China Spring in two consecutive years.The results showed that the fertility of YM-type TMS wheat lines was controlled by two additive-dominance-epitasis major genes plus polygene.The heritability of major genes were very high with 95.62% and 90.32%,and combined with additive-dominance-epitasis polygene in 2008 and additive-dominance polygene in 2009 with polygenic heritability of 0.058% and 6.11%,respectively,which reflected the effects of environment on the variation of male fertility.