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高效低成本的杂种种子生产是种植杂交水稻的重要条件;而改良水稻的花器性状,使之适合异交,则是进行杂交种子生产的前提。随着杂交稻的种植推广,选育具有异交特性优良的花器性状的三系已列入育种计划。为了指导育种实践,提高育种效率,研究稻花器性状的遗传力及其诸性状之间的相互关系,有着重要的意义。Virmani(1972)研究过包括野生稻和栽培稻各亚种的29个品种、类型的若干花器性状,认为柱头外露率
The production of hybrid seed with high efficiency and low cost is an important condition for the cultivation of hybrid rice. However, improving the floral traits of rice and making it suitable for outcrossing are the prerequisites for hybrid seed production. With the popularization and cultivation of hybrid rice, three lines which breed floral traits with excellent outcrossing characteristics have been included in breeding programs. In order to guide the practice of breeding and improve the breeding efficiency, it is of great significance to study the heritability of rice traits and the relationships among them. Virmani (1972) studied several floral characteristics of 29 species and types of wild and cultivated rice subspecies and concluded that the stigma exsertion rate