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本研究采用Eberhart及Russell模型(1966)就7个橡胶无性系在巴西圣保罗州5个不同植胶环境中的茎围生长和干胶产量的基因型×环境互作及稳定性进行了分析。试验中茎围生长及干胶产量分别测定了10个和4个年份。研究结果显示,年份×地点及地点为基因型×环境互作的主要变异来源。稳定性分析结果表明,GT1和IAN873分别为茎围生长和干胶产量稳定性最高的无性系,其回归系数均接近1(β=1),并且都具有最低的离回归均方(S2d)i。不仅如此,二者的决定系数(R2)分别高达89.5%和89.8%,也印证其稳定性非常之高。相比之下,无性系PB235、PB261和RRIM701在茎围生长,以及GT1在干胶产量上的回归系数β均显著大于1,故在该2个性状上这些无性系各自都易受环境变化的影响。
In this study, Eberhart and Russell model (1966) were used to analyze the genotype × environment interaction and stability of stem-growth and dry-matter yield in five different rubbery environments in seven rubber clones in São Paulo, Brazil. Stem circumference growth and dry glue production were measured in 10 and 4 years respectively. The results showed that year × location and location were the main source of variation for genotype × environment interaction. The results of stability analysis showed that GT1 and IAN873 were the clones with the highest stability of stem-growth and dry glue respectively, and the regression coefficients were close to 1 (β = 1), and both had the lowest mean square regression (S2d) i . Not only that, the determination coefficient (R2) of the two is as high as 89.5% and 89.8% respectively, which also confirms the very high stability. In contrast, the clonal growth of the clones PB235, PB261 and RRIM701 and the regression coefficient β of GT1 on the dry glue yield were all significantly greater than 1, so the clones were susceptible to environmental changes influences.