Heredity Study On Plant Height And Panicle Characters Of Japonica Rice In Liaoning

Using the Griffing design II and two methods, including Maximum likelihood estimate and the ADAA Genetic Model, main agronomic traits such as plant height, panicle curved extent, grain were analyzed . The results were showed as follow:1. The plant height, panicle length, primary rachis branches, number of secondary branches, number of ripened grains per panicle, number of unfilled grains, grain density and percentage of productive tillers were mainly controlled by dominant effect; The panicle curved extent was controlled by multiple heredity system.2. The broad heritability and the narrow heritability of the plant height, panicle curved extent, panicle length, grain density and percentage of productive tillers were all very significant. So these traits might be selected in the early generations.3. For the number of second rachis branches and the number of ripened grains per panicle, 12 of 15 combinations put up the VAA effect; for the grain density, 10 of 15 combinations put up the VAA effect. There were interaction between non-alleles of the number of second rachis branches, the number of ripened grains per panicle and the grain density.4. Liming, Zhenyou2 had the effect of increasing the height of plant, the number of secondary branch and grain density. Shendao4 had the effect of increasing the panicle length, the primary rachis branch number, the number of second rachis branches. Liaojing5 had the effect of decreasing the percentage of productive tillers.5. The estimations of heritability correlation among plant height, the panicle curved extent and panicle traits indicated that most of them were mainly controlled by dominant effect. There was very significant positive correlation between the plant height and the panicle length, the second rachis branch number, there was significant or very significant positive correlation between the panicle curved extent and the number of second rachis branches.6. The genetic correlation between the characters of panicle was very complex, The heritability correlations among number of primary rachis branches and number of second rachis branches, number of ripened grains per panicle, number of unfilled grains and grain density were extremely significant in additive effect, dominant effect and ED:7. In hybrid descent's generation, the average superiority of plant height and panicle curved extent was significant or very significant.