Genetic Study on the Male Sterile Mutant of Podedible Pea

A male sterile plant was found in the course of hybridization breeding of podedible pea. With the exception of its anthers being lightly yellow and half-transparent, and completely lack of pollens, its appearance was similar to that of normal fertile plant. In order to study the genetic characteristic and stability of the male sterile mutant this experiment was carried on. Sister cross was done between the male sterile plant and a few fertile plants as male parent from the same strain, its F1 plants all being fertile, and both fertile plants and sterile ones existing in its F2 , the ratio of which was consistent with 3 :1. Test cross was made between the male sterile mutant and several plants as male parent from other strains, at the same time reciprocal cross was carried on between some plants as female parent from other strains and F1 plants as male parent from sister cross. As a result, the fertility expression in progenies of test cross was the same as that of reciprocal cross, their F1 plants all being fertile, and both fertile plants and sterile ones emerging from their F2, the ratio of which was fit to 3:1 The result indicated that the male sterile character was genetic and due to a nuclear recessive gene, and stable in different years and seasons.