K型小麦雄性不育系K149A,保持系149及其3个恢复材料L783,太106和PH85-4经杂交、自交获得F1(AR),F2,B2(A∥AR),B’2(A∥BR)等世代材料,所有材料连同亲本于1995年秋种植于山东农业大学农场,1996年考查其自交结实率并据此分析K型小麦雄性不育系育性恢复的遗传特点,结果表明F2和B2中极少出现完全不育株,F1、F2和B2平均自交结实率无显著差异,且B’2的平均自交结实率显著低于B2,因此初步认为K型小麦雄性不育系属于配子体不育,3个恢复材料可能均含有一对主效显性恢复基因和众多微效恢复基因,L783的恢复力强于太106和PH85-4。 F1 (AR), F2 and B2 (A∥AR) were obtained from K-wheat male sterile line K149A, maintainer line 149 and three restorer lines L783, 106 and PH85-4 by selfing. B’2 (A // BR), all the materials were planted on the farm of Shandong Agricultural University in the autumn of 1995 along with their parents. The rate of selfing was measured in 1996 and the fertility restoration of K-type male sterile lines was analyzed The results showed that there were very few complete sterile plants in F2 and B2, the average selfing rate of F1, F2 and B2 was not significantly different, and the average selfing rate of B’2 was significantly lower than that of B2 K-type male sterile lines belonged to male gametophyte sterility. The three restorer materials all may contain a pair of dominant-effect recovery genes and many restorer genes. The recovery of L783 was stronger than that of 106 and PH85-4.