Genetic and Correlation Study on Plant Height and Its Components in Wheat

In order to provide fundemental informations for wheat breeding, the genetic and correlation analysis among plant height and its components of four winter wheat combinations, including P1、P2、F1、F2、BC1 and BC2 were studied with progeny mean analysis. The results showed that except for one combination with significant epistatic effects, the characters of plant height were mainly controlled by the additive and dominance effects of gene. Moreover, the dominant effects were more important than the additive effects. The first stem length (neck stem under spike) and the second stem length were significant positively correlated with plant height and spike length. There were also significant positive correlation between each stem length and the next stem under it. The order of relative contribution of components to plant height was that 1st stem 2nd stem 3rd stem spike length 4th stem. The selection of parents and its offspring under wheat breeding program was also discussed in this paper.