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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2019, Volume : 7, Issue : 1
First page : (374) Last page : (382)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7380

Genetic Variability, Heritability and Genetic Advance in Okra

B. Rambabu¹*, D.P. Waskar ¹ and V.S. Khandare ²

¹Department of Horticulture, Vegetable Science, VNMKV, Parbhani,-431402 (M.S), Maharastra, India
²Department of Agricultural Botany, (Genetics and plant breeding), VNMKV,
Parbhani,-431402 (M.S), Maharastra, India
*Corresponding Author E-mail: Banothurambabu86@gmail.com
Received: 10.01.2019 | Revised: 16.02.2019 | Accepted: 24.02.2019  

 ABSTRACT

The experiment was conducted to estimate the genetic variability in 20 diverse okra germplasm accessions. The variability parameters like mean, range of variation, genotypic and phenotypic coefficient of variation, heritability in broad sense, genetic advance and genetic advance as percentage of mean were estimated for 18 different characters. The values of phenotypic coefficient of variation (PCV) were higher than genotypic coefficient of variation (GCV) for all the characters indicating the influence of environmental factors. The magnitude of heritability was observed to be high for all the characters under study indicated that the larger portion for total variation would be under genetic control and selection based on phenotypic levels would be useful for the improvement of these traits. High estimates of heritability coupled with high genetic advance expressed as percentage of mean were observed for plant height, number of branches per plant, inter nodal length(cm), days to first flowering, days to 50% flowering, days to first harvest, days to last harvest, fruit length(cm), fruit girth(cm), fruit weight(g), number of fruits per plant, number of seeds per fruit, fruit yield per plant(g), 100 seed weight(g), number of picking, crude fiber content(%), iodine content(g), iron content(g). which may be attributed to the preponderance of additive gene action and possess high selective value and thus, selection pressure could profitably be applied on this character for their improvement. The analysis of variance revealed significant difference for eighteen characters studied suggesting considerable amount of variability exists among the genotypes. Wide range of variability was observed for plant height, number of seeds per fruit, iodine content, and fruit yield per plant indicating the scope for selection of suitable initial breeding material for further improvement. In a true agreement with the GCV and PCV values in the present investigation for most of the characters was noticed, indicating additive genetic variance governing the high heritability (>60%) with high genetic advance as per cent of mean was high (>20%) for plant height, number of branches, days to first flowering, days to 50% flowering, days to first harvest, average fruit weight, number of fruits per plant, number of seeds per fruit, number of pickings, 100 seed weight, crude fibre content, iodine content, iron content and fruit yield per plant. Hence there could be exercised for improvement through selection.

Key words: Genetic advance, GCV, PCV, Heritability.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Rambabu, B., Waskar, D.P. and Khandare, V.S., Genetic Variability, Heritability and Genetic Advance in Okra, Int. J. Pure App. Biosci.7(1): 374-382 (2019). doi: http://dx.doi.org/10.18782/2320-7051.7380