Association of Characters and Path Coefficient Analysis of Seed Yield and Yield Components in Onion (Allium Cepa L.)

Abstract

Fifteen onion genotypes (one standard check and 14 exotic cultivars) were evaluated in RCBD with 3 replications at Melkassa Research Center during the 1999/2000 growing season (Aug.-Feb.). The objective of the study was to understand the association of characters with seed yield.The genotypic correlation coefficients were greater in magnitude than the phenotypic ones. Seed yield/plant had a high, significant correlation with number of flower stalks/plant, number of seeds and flowers/umbel and umbel size. Bolting and flowering period had a significant negative correlation with seed yield/plant. From the path analysis results, the number of flower stalks/plant, bolting period, thousand seed weight, flower stalk diameter and umbel size had a high direct positive effect on seed yield/plant. Since the direct and indirect effects through these components on seed yield are high and positive, selection should concentrate on these traits for high seed yield in onion cultivars. Since these components were found to affect seed yield they could be used for developing varieties for the growing onion industry in the country.

Character association and genetic gain of nine agronomic traits of F1 populations in onion (Allium cepa L.)

“…The high genotypic correlation does not reflect nature and magnitude of phenotypic variation. Aklilu et al (2001), Trivedi et al (2006) and Lakshmi (2015) noticed higher values of genotypic correlations in their studied material onion. Characters showed highly significant correlation with each other in maximum cases except with neck length in this study.…”

Identification of Male Sterile Lines and Floral Characterization of White Onion (Alium cepa)

“…The flowers were tightly packed, and about a week or 10 days after the start of flowering, the opening of new flower buds tended to displace adjacent flowers which had opened previously. Flowers which opened later, developed longer pedicels and consequently the earlier flowers became buried, once they reached stage 6, under a layer of more recent flowers [10,29,[3][4][5][6][7][8][9][18][19][20][21][22][23][11][12][13][14][15][16][17][24][25][26][27][28][30][31][32].…”

“…Jones and Mann [1] have suggested Pakistan, Iran, and the mountainous areas of north India as their origin. India has an area of 12.30 Lakh ha in the world with a production of 215.64 lakh tons and a productivity of 16.16t/ha [2,[3][4][5][6][7][8][9]. The leading producer of onion is Maharastra followed by Karnataka and Madhya Pradesh.…”