Correlation and path coefficient analysis in onion (Allium cepa L. var. aggregatum Don.)

摘要

A study on the association of metric traits involving twenty aggregatum onion ecotypes (Allium cepa L. var. aggregatum Don.) revealed that the yield components like plant height, leaf length, leaf breadth, number of leaves, weight of plant, number of bulbs, bulb length, bulb diameter and volume of bulb exhibited significant positive association with yield. These components were also positively inter correlated among themselves. The path coefficient analysis indicated that plant height, leaf breadth, weight of plant, bulb length, shape index, days to maturity, and harvest index, had direct positive either on yield. While leaf length, number of leaves, number of bulbs, bulb diameter, volume of bulb and storage lift: had negative direct effects. Plant height and weight of plant are dependable indices of selection in identifying the yield potential of individual ecotypes.