Inheritance pattern of fertility restoration on maldandi cytoplasm in rabi sorghum (Sorghum bicolor (L.) Moench

The inheritance pattern of fertility restoration was studied in the F2 populations of three crosses involving maldandi cytoplasm based A lines viz., CS 3541A, M 31-2A and CSV 14RA and a restorer parent, BRJ 62 during rabi 2011. They were scored for the segregation ratios (Fertility : Sterility) to determine the number of genes involved in the fertility restoration on maldandi based cytoplasmic-genic male sterility (CMS) system. The F2's of the crosses CS 3541A x BRJ 62 and CSV 14RA x BRJ 62 segregated in ratio of 15:1 indicating two independent major genes, while in the cross M 31-2A x BRJ 62 showed monogenic ratio of 3:1 indicating single major gene for fertility restoration. It could be concluded that restoration pattern depends both on the type of cytoplasm and nucleus of the parents