半无叶型豌豆7个农艺性状的通径分析及利用

Path Analysis Among Seven Agronomic Characters in Semi-Leafless Pea

对半无叶型豌豆不同品系的株高 (x1)、单株荚数 (x2 )、分枝数 (x3)、百粒重 (x4 )、单株粒数 (x5)、双花双荚数 (x6 )和单株籽粒产量 (y)进行了通径分析。结果表明 :各个性状对产量的相对重要性排序为单株粒数 >百粒重 >分枝数 >单株荚数 >双花双荚数 >株高 ,其中 ,各个农艺性状对单株产量的直接效应中单株粒数最高 ,间接效应中单株荚数通过单株粒数对籽粒产量的间接作用最大。进一步分析表明 :在利用半无叶型豌豆育种中 ,应以选择单株粒数、单株荚数为主 ,同时要注意增加双花双荚数 ,适当兼顾百粒重及其它。

Seven agronomic characters, i e plantheight(X 1), pod number per plant(X 2), branch number per plant(X 3), weight of 100 seeds(X 4),seed number per plant(X 5), number of dual flowersand pods(X 6) and seed yield per plant in different semi-leafless pea lines were studied through path analysis The results were as follows: the order of relative importance of the six characters to seed yield per plant was X 5>X 4>X 3>X 2>X 6>X 1> Among direct effects of the six characters to seed yield per plant, seed number per plant was the highest Among all indirect effects, pod number per plant in direct effect though seed number per plantwas the biggest In pea breeding using semi-leafless types, seed number per plant and podnumber per plant should be selected primarily Simultaneously,number of dual flowers and pods should be paid more attention, and the other characters should be also given attention as well Semi-leafless pea had been proved to be more valuable in high yield pea breeding