论文部分内容阅读
重点就7个橡胶无性系在巴西圣保罗高原地区5个不同植胶环境中茎围生长的表型稳定性进行了分析评估。试验采用随机区组设计,重复3次。茎围长度为植株定植后第6年的测定值。5个试验点的联合方差分析结果显示,无性系在该性状上存在极显著的基因型×环境互作效应,而且变异成分中地点(线性)及无性系×地点(线性)效应均达极显著或显著水平,这表明各植胶环境中无性系在该性状上的表现具有明显的可预测性。稳定性分析结果显示,无性系GT1在该性状上稳定性高,适应性强,在各种不同环境下都具有较好表现。无性系PB235及IAN873在该性状上尽管均具有明显的线性预测效果,但前者适宜在有利条件下生长,后者则可适应较差环境。此外,若按选择强度0.82对参试无性系进行选择,则预期的遗传增益为5.55cm,较之无性系总平均值提高15.26%。
The phenotypic stability of the stems growth of seven rubber clones in five different plasticized environments in the São Paulo Plateau of Brazil was emphatically analyzed. Randomized block design trial, repeated 3 times. Stem circumference is the 6th year after plant colonization. The results of joint analysis of variance showed that there was a significant genotype × environment interaction effect on the traits in both clones, and both the location (linear) and the clonal × locus (linear) effects of the variation components reached extremely significant Or significant level, indicating that the clonal performance of the traits in this environment is clearly predictable. The results of stability analysis showed that clonal GT1 has high stability and adaptability in this trait, and has good performance in various environments. Although both the clones PB235 and IAN873 had significant linear predictive value in this trait, the former was suitable for growth under favorable conditions while the latter could be adapted to the worse environment. In addition, the expected genetic gain of 5.55 cm for selection of tested clones at a selection intensity of 0.82 was 15.26% greater than the overall mean of clones.