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从自然突变体中选出的A_1矮苗,经繁殖成第二代无性系,通过近两年的试验观察,其植株高度和表示植株矮壮程度的高粗比((茎围/株高)×100)与对照RRIM600的比较,差异均极显著,并由这两个性状测定的广义遗传力亦比较高,达90％以上,说明其矮性特征相对比较稳定,受环境影响小,选择是有效的,这对丰富橡胶矮源和抗性育种具有积极的实践意义。
The A 1 seedlings, selected from natural mutants, were propagated into the second-generation clones. The plant height and height-to-weight ratio ((stem circumference / plant height) × 100) compared with the control RRIM600, the difference was extremely significant, and the general heritability determined by these two traits was also relatively high, reaching more than 90%, indicating that the characteristics of its dwarfism were relatively stable, affected by the environment and the selection was effective , Which has a positive practical significance for abundant rubber dwarf sources and resistant breeding.