蓖麻主要数量性状的相关和通径分析

本文分析了蓖麻品种单株产量等8个性状的相关及各性状与单株产量的遗传通径系数。结果表明,一次分枝数和百粒重与单株产量的遗传相关达显著正相关;株高和主穗蒴果数与单株产量的环境相关达显著正相关。提高单株产量的有效途径是在保持相对稳定的株高、主茎节数前提下,应以一次分枝数较多,百粒重较高和主穗蒴果数较多的类型作为主要选择目标。

A CORRELATION AND PATH COEFFICIENT ANALYSIS OF MAIN QUANTITATIVE CHARACTERS IN CASTOR

The correlations of eight characters(yield per plant,etc)with each other and the ge- netic path coefficient of yield per plant through other characters were analysized.The re- sults showed that genetic correlation of numbet of first branches and 100 seed weight with yield per plant is significantly positive.Also the enviornmental correlation of plant height and number of capsules of main spike with yield per plant is significantly positive.The helpful approach to increase yield per plant is to select castor varieties with more number of first branches,higher 100 seed weight and capsules of main spike when plant height and number of main stem node are relatively maintained stability.