不同杂交方式选育籼型光敏核不育系效果探讨

THE EFFECTS OF DIFFERENT CROSSES ON BREEDING OF INDICA PHOTOPERIOD SENSITIVE GENIC MALE-STERILE (PGMS) LINES

Four types of cross designs, a) japonica PGMS line/indica variety, b) japonicaPGMS line/indica variety//indica variety, c) indica PGMS line/ indica variety,javanica or japonica wide-compatibility variety, and d) indica PGMS line//indica PGMSline/indica variety, javanica or japonica wide-compatibility variety, were used in breed-ing new indica PGMS lines. Results shows: while all designs were feasible, thedesigns using indica PGMS lines as the donor parents were more efficient. The multiplecross of indica PGMS line//indica PGMS line/indica variety, javanica or japonica wide-compatibility variety was recommended for increasing the proportion of indica PGMS insegregation of posterity.