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本文通过对水稻早籼品种间杂交12个组合的F_3生育期遗传规律的研究结果表明,F_3抽穗期与F_2中选单株的抽穗期以及亲本的抽穗期的相关和回归关系密切。遗传力测定,以迟熟较高,早熟中等,中熟较低。表型变异系数高于遗传变异系数。遗传进度测定,迟熟较快,早熟次之,中熟较慢。相关性的测定,早熟类型与有效穗、主穗长、株高为显著遗传相关;迟熟类型与主穗长、每穗总粒数、空秕数为显著遗传相关。
In this paper, we studied the genetic rule of F_3 growth period in 12 combinations of early Indica rice varieties. The results showed that there was close correlation and regression between F_3 heading date and heading date of F_2 mid-life and parental heading date. Heritability determination to late maturity, early maturity medium, low maturity. The phenotypic variation coefficient is higher than the genetic variation coefficient. Genetic progress determination, late maturity, precocious second, slow maturity. Correlation analysis showed that the types of early maturing were significantly and genetically related to effective panicle, main spike length and plant height. The type of late maturity was significantly and genetically related to the main spike length, total grains per panicle, and number of aerial parts.