选用３个不育系和６个恢复系以不完全双列杂交配制１８个组合，研究了７个主要经济性状的配合力和遗传力。结果表明，株高、穗长、穗重、结实率、千粒重主要受控于一般配合力作用，单株有效穗和小区产量除受一般配合力制约外，还受特殊配合力的影响。在亲本的选择中，应特别注意选育一般配合力高，且性状能互补的优良不育系和恢复系。本试验认为Ｃ４Ａ、Ｍ１０５和Ｃ４Ａ／Ｍ１０５是较好的不育系、恢复系和杂交晚稻组合 Three combinations of sterile lines and six restorer lines were constructed by incomplete diallel cross to study the combining ability and heritability of seven major economic traits. The results showed that the plant height, spike length, panicle weight, seed setting rate and 1000-grain weight were mainly controlled by the general combining ability. The effective panicles per plant and the yield of the plot were affected by the special combining ability except the general combining ability. In the selection of the parents, special attention should be given to breeding excellent CMS lines and restorer lines with high general combining ability and complementary traits. In this experiment, C4A, M105 and C4A / M105 are considered to be better CMS lines, restorer lines and late hybrid rice combinations