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对1972年定植的14个橡胶无性系1980—1983年五种数量性状的鉴定资料进行了分析研究,以不同年份间的测定作为试验重复,结果表明:各性状的遗传变异普遍比表型变异小;在测定的五种性状中,以茎围生长的广义遗传力最高,达88.5％;表型相关系数与基因型相关系数基本一致,各个组分性状与干胶产量之间的基因型相关系数的大小依序为:产量指数(O.9451)→胶乳产量(O.9265)→茎围生长(0.7094)→干胶含量(—0.0222);其遗传相关贡献则以胶乳产量为最大,其次为干胶产量和产量指数,说明胶乳产量是一个比较活泼的性状,由于它的变化,可以引起其他性状相应的变化。通径分析显示,以胶乳产量对干胶产最的直接效应最高,通径值P25=0.5616,其次为产最指数P_(45)=0.3034。这两者均属组成干胶产量组分的主要因素,说明只要不断改良品种和设法提高胶乳产量,进一步挖掘产胶潜力,就可望达到增产干胶的目的。
The identification data of five quantitative traits of the 14 rubber clones planted in 1972 from 1980 to 1983 were analyzed and repeated with the test of different years as the experiment. The results showed that the genetic variation of each trait was generally smaller than that of the phenotypic variation Among the five traits tested, the generalized heritability of stem circumference was the highest (88.5%). The phenotypic correlation coefficients were basically the same as those of genotypes. The genotype correlation coefficients (O.9451) → latex yield (O.9265) → stem circumference growth (0.7094) → dry glue content (-0.0222). The genetic contribution to latex production was the largest, followed by Adhesive yield and yield index, indicating latex yield is a more lively traits, due to its changes, can cause the corresponding changes in other traits. Path analysis showed that the direct effect of latex production on dry glue production was the highest, with the value of P25 = 0.5616, followed by the production of the most index P_ (45) = 0.3034. Both of these are the main factors that make up the dry weight production components, indicating that as long as the continuous improvement of varieties and try to increase latex production, further digging the potential of plastic production, it is expected to achieve the purpose of dry glue production.