Studies on genetic variability, heritability and genetic advance in brinjal (Solanum melongena L.) genotypes
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Date
2019-07-25
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College of Horticulture and Forestry, Central Agricultural University, Pasighat
Abstract
The present investigation was conducted during May-October 2018 at Vegetable Research Farm, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh with 20 diverse genotypes of brinjal. The experiment was laid out in Randomized Block Design with three replications. Genetic variability was studied for characters viz., plant height (cm), number of primary branches per plant, days to 50% flowering, days to 50% fruit set, days to 1st harvesting, number of fruits per plant, fruit weight (g), fruit length (cm), fruit girth (cm), number of flower per cluster, number of fruit per cluster, fruit yield per plant (kg), solasodine content (mg/100 g fruit), phenols content (mg/100 g), total sugar content (mg/100g), reducing sugar (mg/100g), non-reducing sugar (mg/100g), anthocyanin content (mg/100g) and flavonoid content (mg/100g).
Data were analyzed statistically for phenotypic and genotypic variance, coefficient of variation, heritability, genetic advance, genetic gain, correlation coefficient, path coefficient and genetic divergence.
Analysis of variance revealed significant differences among the genotypes for all the characters. High PCV and GCV, heritability, genetic advance and genetic advance as % of mean were reported for parameters like number of fruit per cluster, fruit weight (g), plant height (cm), fruit length (cm), fruit girth (cm), reducing sugar (mg/100g), fruit yield per plant (kg), non-reducing sugar (mg/100g), number of primary branches and total sugar content (mg/100g).
Correlation studies indicated that fruit yield per plant was positively and significantly correlated with fruit weight, fruit length and fruit girth but negative and significant association was established with days to 50% flowering, days to 1st harvesting and number of fruits per plant.
Maximum positive direct effect on fruit yield per plant was imposed by number of primary branches per plant followed by fruit length, phenols content, days to 50% flowering, number of fruits per plant, solasodine content, fruit girth, reducing sugar and fruit weight. However, high negative direct effect was observed for plant height, days to 1st harvesting at genotypic level. Divergence study revealed fruit yield per plant (kg) contributed maximum percent to diversity followed by number of fruit per cluster, plant height and flavonoid content (mg/100g). Maximum inter cluster distance was observed between cluster III and V and indicated that the genotypes within these were highly divergent.
Description
The present investigation was conducted during May-October 2018 at Vegetable Research Farm, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh with 20 diverse genotypes of brinjal. The experiment was laid out in Randomized Block Design with three replications. Genetic variability was studied for characters viz., plant height (cm), number of primary branches per plant, days to 50% flowering, days to 50% fruit set, days to 1st harvesting, number of fruits per plant, fruit weight (g), fruit length (cm), fruit girth (cm), number of flower per cluster, number of fruit per cluster, fruit yield per plant (kg), solasodine content (mg/100 g fruit), phenols content (mg/100 g), total sugar content (mg/100g), reducing sugar (mg/100g), non-reducing sugar (mg/100g), anthocyanin content (mg/100g) and flavonoid content (mg/100g).
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