Relationship of quantitative traits in different morphotypes of pea (Pisum sativum L.)

Relationship of quantitative traits in pea morphotypes

Abstract

Studying relationships between main quantitative traits gives an opportunity to be predicted the results of selection on certain traits and improved the breeding process. In the present investigation was made an assessment of correlation dependencies in pea lines with a different morphology of the compound leaf: ordinary ("AFAFTLTLSTST"); afila (semi-leafless -"afafTLTLSTST"); pleiofila (tendril acacia - "afaftltlSTST"). The results showed a positive significant correlation of the plant height with 1^st pod height (r=0.701, 0.390, 0.386) in the three pea morphotypes, and with the pods number per plant (r=0.701, 0.390, 0.386) in afila and pleiofila type. Positive, statistically significant relationships were found between seed weight per plant with the number of pods (r = 0.516) and seeds (r = 0.567) only in ordinary leaf morphotype, and with the 1000 seeds weight (r = 0.448) in pleiofila type. The number of pods per plant and number of seeds in a pod had the maximum positive direct effect on seed productivity in afila and pleiofila types of leaves. In genotypes with the ordinary type of leaves, selection criteriа can be the number  of seeds per plant (0.890) and plant height (0.420), and in pleiofila type - 1000 seeds weight (0.596). In the genotypes of the three morphotypes, the traits of number seeds per plant (0.850, 0.042, 0.075) and number