Title: Comparative Analysis of Genetic Effect of Some Plant Type Characters on Maize Between Old and New Methods
Abstract:Fourteen maize inbred lines and forty nine crosses mated by NCⅡdesign were used in the experiment. The genetic effects for seven characters were analyzed with mixed linear model analysis and combining...Fourteen maize inbred lines and forty nine crosses mated by NCⅡdesign were used in the experiment. The genetic effects for seven characters were analyzed with mixed linear model analysis and combining ability analysis. The results showed that the mixed linear model analysis indicated: As for length of tassel, there are dominant and additive and A A epistatic genetic effect, only dominant genetic effect is significant at 0.05 level probability. As for plant height, ear height, width of leaf and length of leaf, there are dominant and A A epistatic genetic effect, and all are significant at 0.01 level probability. As for number of tassel and weight of tassel, there are additive and dominant genetic effect, and all are significant at 0.01 level probability. But combining ability analysis is based on additive dominant model. It reveals that some traits just have additive effect and dominant effect. The differences of genetic variance proportion between mixed model analysis and combining ability analysis are significant. It is suggested by combining ability analysis that the differences of genetic variance component are mainly caused by less estimating genotype-environment interaction, and by more estimating additive effect. The difference of heritability in the broad sense is caused by genotype environment interaction. The difference of heretability in the narrow sense is caused by genotype environment interaction and additive effect/A A effect estimated by the two different methods.Read More
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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