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VCRB :: Contents of Volume 58/2003 :: Detailed information


SEED PRODUCTION POTENTIAL AND ASSOCIATION OF INFLORESCENCE CHARACTERS WITH SEED YIELD IN TROPICALLY ADAPTED ONION (ALLIUM CEPA) CULTIVARS


Shimeles AKLILU1, A.S. KATARIA2
1Ethiopian Agricultural Organization, Melkassa Agricultural Research Center, Nazareth, Ethiopia 2 Seed Association of India, 7425 516 KD. 240 Pitam pura, New Delhi, India


Summary

Fifteen onion genotypes (one standard check and 14 exotic cultivars) were evaluated in RCBD with 3 replication at Melkassa Research Center during 1999/2000 growing season (Aug.- Feb.). The objectives of the study were to evaluate inflorescence characters, seed production potential and association of characters with seed yield of tropically adapted onion cultivars. Analysis of variance revealed the presence of significant difference among the genotypes in flower characters and seed production potential. Red Creole Select, Agrifound Dark and Light Red, Nasik and Poona Red, Violet de Galmi and K1 were found to be the best cultivars for inflorescence characters and seed yield potential. The highest yielder Red Creole Select gave 8835.3 g·100 m-2 seed as compared to the lowest yielder Red Creole Starek Ayres 2638.3 g·100 m-2. Seed quality was also greatly affected by cultivar differences. Lowest number of seeds per gram was recorded from the cultivars Red Creole Select and Merimiru Brown (242.1) and large number of seeds were also recorded from Early Red, Rampure and Agrifound Light Red. Cultivars Red Creole Select, Mermiru Brown and IRAT-69 produced the heaviest seed, whereas, Eearly Red, Rampure and Argifound Light Red produced very light weight seed. Genotypic correlation coefficient was higher in magnitude than phenotypic ones. Seed yield/plant had higher and significant correlation with number of flower stalks/plant, number of seeds and flowers per umbel and umbel size. Bolting and flowering period had significant negative association with seed yield/plant. 


keywords:inflorescence, characters, correlation, genotypes, onion, cultivars, seed yield

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