Selection Criteria for Improving Yield in Chili (Capsicum annuum)

S Chakrabarty,A K M Aminul Islam

doi:10.1155/2017/5437870

S Chakrabarty, A K M Aminul Islam

Open Access

https://doi.org/10.1155/2017/5437870

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Abstract

The present investigation was carried out to estimate the genetic variability and character association. Significant differences were observed among the genotypes for all the 15 traits for 20 chili genotypes. The highest genotypic coefficient of variation and phenotypic coefficient of variation were found for ten edible fruit weight, number of fruits per plant, fruit yield per plant, ten dry fruit weight, fruit length, fruit width, and weight of seeds per fruit. High heritability coupled with very high genetic advance as per cent of mean was observed for ten edible fruit weight, ten dry fruit weight, fruit length, number of fruits per plant, and fruit yield per plant. Phenotypic correlation coefficient among different traits indicated that fruit yield per plant at green stage had significant and positive association with ten edible green fruit weight, number of primary branches, harvest duration, and first fruit maturity and significant negative correlation with days to first picking. The path coefficient analysis revealed that days to first picking had the maximum positive direct effect on fruit yield per plant followed by harvest duration, ten edible fruit weight, ten dry fruit weight, hundred-seed weight, number of fruits per plant, first fruit maturity, and number of primary branches. Days to first picking had the maximum positive direct effect but significant negative effect with fruit yield per plant which indicated that the trait should be selected to expunge the undesirable indirect effect in order to make use of the direct effect. Therefore, selection should be practiced for ten edible fruit weight, ten dry fruit weight, number of fruits per plant, harvest duration, and hundred-seed weight for direct improvement of fruit yield per plant.

Highlights

Chili (2n = 24) belongs to the family Solanaceae that is grown all over the world
Low range of variability was observed in respect of weight of seeds per fruit (0.15–0.53 g), hundred-seed weight (0.25 g–0.66 g), fruit width at green stage (0.70 cm–2.10 cm), and number of primary branches (10.67–19.00) and these present investigation endorse the findings of Munshi et al [11] and Arunkumar et al [12]
The coefficient of variation (CV) in all the traits ranged from 1.18 to 21.51; slightly higher coefficient of variation (CV%) was recorded in ten edible fruit weight at green stage followed by fruit yield per plant at green edible stage, number of primary branches, number fruits per plant, fruit length, and plant height (Table 2)

Summary

Introduction

The major cause of low productivity of chili in Bangladesh is the lack of high yielding varieties or hybrids. The existing trend of low productivity of chili can be improved through developing high yielding varieties with desirable qualities. Higher genetic variability with least environmental effect is considered in the selection of genotype but it is difficult when the traits are controlled by polygenes. In this case heritability coupled with genetic advance is the more useful measure for selecting the best individuals [5]. Adequate knowledge of the level of variability in the population, the degree of character association, and the relative importance of the yield components is the most important in selecting genotypes for an efficient breeding program. Correlation measures the strength of the association between two traits but correlation coefficients alone may not reveal the relative importance of the causal factors in relation to the dependent variable

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Conclusion