Interrelationship among yield and yield contributing characters in onion (Allium cepa L.)

Interrelationship among yield and yield contributing characters in onion (Allium cepa L.)

2015

E10389

Knowledge of interrelationships between grain yield and its contributing components will improve the efficiency of breeding programs through the use of appropriate selection indices. The objective of this study was to evaluate of interrelationships among seed yield and related characters in onion. Height of flowering stem, umbel diameter, number of capsule per plant, number of seed per capsule, and yield per umbel correlated positively with total seed yield. The highest correlation was shown by number of capsule and number of seed per capsule with total seed yield. The results of stepwise regression analysis showed that, number of capsule, umbel yield, and thousand seed weight remained in the final model. Path analysis was used to partition the genetic correlations between seed yield and related characters. Yield per umbel, number of capsule, height of flowering stem, number of seed per capsule, and thousand seed weight showed positive direct effect on seed yield. The highest indirect effect belonged to number of capsule, height of flowering stem, number of seed per capsule and via yield per umbel. Consequently, the results of this study revealed that, the characters such as the number capsule per plant, number of seed per capsule, and yield per umbel were the most important yield contributing characters and maximum emphasis should be given on these characters.

4(1):5-9, TRENDS IN LIFE SCIENCES

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