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本文对作为杂交亲本材料的二十个胡麻品种(系)的主要农艺性状进行了遗传相关和通径分析。结果表明:单株粒数、单株结实果数与单株粒重的遗传呈极显著正相关;直接通径系数为较大正效应。二者通过有效分枝数和千粒重对单株粒重的间接作用为负效应。有效分枝数、有效分茎数与单株粒重遗传呈极显著正相关;直接通径系数为负效应,但其通过单株结实果数、单株粒数的间接作用为较大的正效应。千粒重与单株粒重的遗传相关呈显著负相关,其直接通径系数为较大的正效应。通过单株粒数的间接效应为较大的负效应;通过其它性状的间接效应都很微弱。因此,选育高产新品种,以提高单株粒数、单株结实果数为主;间接选择有效分枝数多,千粒重大的单株。
The main agronomic traits of twenty flax cultivars (lines), which are hybrid parental materials, were genetically related and path analyzed. The results showed that there was a significant and significant positive correlation between the grain number per plant, the number of fruit per plant and the inheritance of grain weight per plant. The direct path coefficient was positive effect. Both of them have a negative effect on the grain weight per plant by the effective number of branches and 1000-grain weight. The number of effective branches, the effective number of stems and grain weight per plant showed a very significant positive correlation; direct coefficient of pathways for the negative effect, but through the number of fruit per plant, the indirect effect of grain per plant is larger positive effect. There was a significant negative correlation between the 1000-grain weight and the genetic correlation of grain weight per plant, and the direct path coefficient was a large positive effect. The indirect effect through the number of grains per plant is a large negative effect; the indirect effects through other traits are weak. Therefore, breeding new varieties of high yield, in order to improve the number of grains per plant, the number of fruit per plant is the main; indirect selection of effective number of branches, 1000-weight single plant.