Development of a new cytoplasmic‐nuclear male‐sterility line of soybean and inheritance of its male‐fertility restorability

Abstract

Abstract Based on previous work, a new cytoplasmic‐nuclear male‐sterile line NJCMS2A along with its maintainer NJCMS2B of soybean was released through four episodes of nuclear substitution backcrossing with male‐sterile plants of (N8855 × N1628)F 2 as donor parent and N1628 as recurrent parent. The male sterility of NJCMS2A was complete and female fertility was normal. A series of restorers from different sources were screened out and evaluated. It was found that from the crosses between NJCMS2A and its restorers, two pairs of duplicate dominant genes, allelic to those of NJCMS1A, controlled the inheritance of fertility restorability of NJCMS2A.