[Establishment of Genic Male Sterile Lines of Brassica napus by Wide Cross and Their Cytology and Morphology.].

One and three male sterile plants were found in the progenies of the intergeneric hybrids by crossing Brassica napus and Brassica juncea to Orychophragmus violaceus, respectively. After interspecific cross and full-sib crosses, four genic male sterile lines were obtained. The results of cytological observations indicated that somatic chromosome number was 38 in all types of sterile lines, which were considered as the type of B.

[Hypoploid groups and their cytogenetic analysis in the progenies between Brassica napus and Orychophragmus violaceus].

Several groups of hypoploids were characterized in pentaploid (p) progenies of B. napus and O. violaceus.