Effect of genotype and environment on yield-related traits of Longyan's late hybrid rice

Data collected from the joint regional trials on the late hybrid rice from 1996 to 2007 were analyzed to determine the correlation among yield-related traits and the rice genotype and environmental factors.The trials were held in 6 Longyan areas that constituted different ecological conditions-Xinluo,Changting,Liancheng,Shanghang,Wuping and Zhangping.Variations on 9 traits,including yield,growth period,effective ear,plant height,spikete length,total grains per spikete,filled grains per spikete,seed setting rate and 1000-grain weight,were measured.The data were subjected to AMMI and corresponding statistical analysis.The results indicated that genotype and genotype-environment interaction(G譋) had a significant effect on the 9 traits.Among the traits,(a) none was found to be controlled by genotype alone;(b) the yield,plant high,effective ear,growth period,spikete length and total grains per spikete were mainly controlled by the environmental factors;and(c) the seed setting rate,filled grains per spikete and 1000-grain weight were largely affected by genotype-environmental interaction.The growth period,1000-grain weight,effective ear and spikete length were most stable followed by the seed setting rate and plant height,and the filled grains per spikete and total grains per spikete,while the yield was least stable.The yield fluctuated as it was greatly affected by the cultivation environment and the interactions between genotype and environment.