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用11个玉米自交系(其中2个高油自交系,9个普通自交系)作完全双列杂交,产生55个正交组合,按Grifing(1956)的双列杂交设计方法2进行配合力、方差成分和遗传力的研究。结论指出:1.含油量的基因型差异显著;2.所有自交系的一般配合力效应均达到0.01的显著水平;3.特殊配合力效应只有11个组合达到显著或极显著水平;4.一般配合力效应与特殊配合力效应无关,即一般配合力高未必特殊配合力也高;5.含油量的一般配合力效应高低与自交系本身含油量的高低趋势一致,二者之间表现线性关系。一般配合力效应值y依含油量x的直线回归方程为y=0.5x-2.4,其回归标准误为0.12;6.含油量的加性方差比显性方差重要得多,加性方差占98.5%,而显性方差只占1.5%,表明含油量有很高的遗传力。文章还对配合力和遗传力对高油玉米育种的指导意义进行了讨论。
A total of 55 orthogonal combinations were generated from 11 maize inbred lines (2 high oil inbred lines and 9 common inbred lines), resulting in 55 orthogonal combinations according to Grifing (1956) Study on Combining Ability, Variance Composition and Heritability. The conclusions are as follows: 1. The genotypes of oil content were significantly different; 2. The general combining ability effect of all the inbred lines reached the significant level of 0.01; 3. The special combining ability effect only reached 11 significant or significant level.4. The general combining ability effect is not related to the special combining ability effect, that is, the general combining ability is high and the special combining ability is not high; 5. The general combining ability effect of oil content is the same as that of the inbred line itself, relationship. The linear regression equation of general combining ability effect y in terms of oil content x is y = 0.5x-2.4, and the standard error of regression is 0.12; 6. The additive variance of oil content is more important than the dominant variance, and the additive variance is 98.5 %, While the dominant variance accounted for only 1.5%, indicating that oil has a high heritability. The article also discussed the guiding significance of combining ability and heritability to high oil corn breeding.