Variability and heritability of average yield of onion bulb - Alium сeрa L.

Abstract

In order to investigate the variability of bulb yield, the trial was set up on an experimental plot of the Centre for Vegetable Crops in Smederevska Palanka during 1997 and 1998. The trial was performed by applying the method of random block system in five replications. Ten varieties of different geographical origins were included as the research material. The recorded values of the investigated features were determined by applying the variance analysis of a two-factorial trial model 2 (Hadživuković, 1991). The components of the phenotype variance, genotype and phenotype coefficient of variation and heritability in broad sense were estimated according to Singh and Chaudhary (1976). Significant variability was recorded for yield bulbs in both years of investigation. For this parameter, genotype variance was greater than the enviromental. Phenotype coefficient of variation (PCV) was greater than genotype coefficient of variation (GCV). Heritability confirmed that the genotype variability was stronger in the overall phenotype variability

Genetic gain of ‘Valenciana’ onion populations developed in the Brazilian Semi-Arid region

“…The coefficient of variance in the experiments was higher Broad-sense heritabilities for bulb yield were quite high, ranging from 0.62 to 0.85 for both populations, except for25CA10 in Juazeiro (Tables 3 and 5). The present results are in agreement with those found by Pavlović et al (2003), who reported broad-sense heritabilities of 0.73 and 0.77 in yield bulb in Serbia and Montenegro. Gashua et al (2013) have also reported high broad-sense heritability (0.71) in a Nigerian onion landrace.…”

Mode of inheritance and AMMI analysis of onion (Aallium cepa L.) bulb traits

“…In F2 generation, heritability in narrow sense was 0.41 and 0.93 in broader (Table 5). Similar results in its researches were found by PAVLOVIĆ, (1999); PAVLOVIĆ et al, (2003); HAYDAR et al, (2007). Similar values for heritability of bulb height in its research were confirmed by RAJALINGAM and HARIPRIYA, (1998); MOHANTY et al, (2001a); SINGH et al, (2010); PAVLOVIĆ et al, (2003); PAVLOVIĆ et al, (2015).…”

“…Following the results of MOHANTY, (2001a); MOHANTY, (2001b); MOHANTY and PRUSTI, (2002); PAVLOVIĆ et al, (2003), which proved similar results of genetic variance component on divergent genotypes and different traits of onion bulb, the results of this study are in coordination with most.…”

“…However, partial domination of better parent, domination of a parent with lower yield and intermediary inheritance appeared in one F1 generation. Statistically significant percentage of heterosis appeared in eight hybrid combinations of F1 generation, of which two combinations had negative values (Table 4) Heterosis in hybrid combinations for total bulb yield in its research was found by PANAJOTOVIĆ, (1986); SUCIU et al, (1985); SUCIU et al, (1986); PAL et al, (1998); PAL et al, (1999); PAVLOVIĆ et al, (2003); SINGH et al, (2010) and for bulb mass. Genetic variance components of bulb height were lower than dominant (H1 and H2) which proves that bigger part of genetic variability belongs to dominant gene influence.…”

“…High values for variability of bulb mass were found by AGIĆ, (1996); PAVLOVIĆ et al, (2002); RIVERA MARTINEZ et al, (2005); HAYDAR et al, (2007); SINGH et al, (2010), and the reason for high variability was the environmental. High values for variability of bulb yield were confirmed by PANAJOTOVIĆ, PAVLOVIĆ et al, (2003). Heterosis for bulb height was highest in F1 hybrid obtained by crossing lines MB x PR (41.20%), MB x ZG (38.80%) and PR x ZG (33.54%).…”