Development of Soybean Cytoplasmic-nuclear Male-sterile Line NJCMS2A and Restorability of Its Male Fertility

Based on previous work, a new soybean nuclear-cytoplasmic male-sterile line was developed through four times of nuclear substitution backcrosses by using male-sterile F 2 plants selected from the cross of N8855×N1628 as donor parent and N1628 as recurrent parent. The male fertility during early generations of the development process of NJCMS2A performed different from that of NJCMS1A. Its morphological traits appeared quite different from that of NJCMS1A, and its outcross-podding rate was also much higher than that of NJCMS1A. The male fertility of F 1s between NJCMS2A and eight soybean varieties showed that five of those could restore its male fertility and the other three could maintain its male sterility.