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Mehta, N.
- Genetic Variability, Heritability and Scope of Genetic Improvement for Yield Components in Tomato (Lycopersicon esculentum Mill.)
Authors
1 Department of Genetic and Plant Breeding, Indira Gandhi Krishi Vishwavidyalaya, Raipur, C.G, IN
2 Department of Horticulture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, C.G, IN
Source
Asian Journal of Bio Science, Vol 8, No 2 (2013), Pagination: 214-217Abstract
Genetic variability, heritability and genetic advance were studied among 20 agro-morphological traits of 31 genotypes of tomato (Lycopersicon esculentum Mill.) during Rabi, 2007-2008. Highest heritability estimate was recorded for average fruit weight (g), pericarp thickness (mm), days to 50 per cent flowering, number of fruits per plant, total fruit yield per plant, total soluble solids (%), indicating that these characters were highly heritable and governed by additive gene effects. High heritability coupled with high genetic advance was observed for number of seeds per fruit, average fruit weight (g), total number of fruits per plant, plant height, fruit set (%) indicating that most likely the heritability is due to additive gene effects. Thus, selection may likely to further improvement in these traits for varietal performance.Keywords
Tomato, Genetic Variability, Heritability,genetic Advance
References
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- Heritability and Genetic Advance of Yield and its Components in Brinjal (Solanum melongena L.)
Authors
1 Department of Genetic and Plant Breeding, Indira Gandhi Krishi Vishwavidyalaya, Raipur, C.G, IN
Source
Asian Journal of Bio Science, Vol 8, No 2 (2013), Pagination: 234-236Abstract
A field experiment studied in twenty seven crosses using line x tester analysis between twelve parents consisted of nine lines (local genotypes of Chhattisgarh) viz., IGB 35, IGB 43, IGB 44, IGB 52, IGB 54, IGB 55, IGB 65, IC 31, IC35 and three testers (improved varieties) viz.,DBR 8, KS 224 and JBR 03 16. The heritability estimates was found higher for all the characters studied from 94.3 per cent to 62.9 per cent indicating that the characters are less influenced by environmental factors. The total fruit yield per plant recorded highest genetic advance as percentage of mean (227.41 %). Genetic advance in general was high for most of the characters studied except days to first flowering, days to first fruiting and plant height, which showed moderate genetic advance as percentage of mean, indicating effectiveness of simple selection for improvement of these characters.Keywords
Brinjal, Heritability, Genetic AdvanceReferences
- Baswana, K.S., Bhatia, M.K. and Duhan, D. (2002). Genetic variability and heritability studies in rainy season brinjal (Solanum melongena L.). Haryana J. Hort. Sci., 31(1&2): 71-73.
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- Mohanty, B.K. (2001). Genetic variability, correlation and path co-efficient studies in brinjal. Ann. Agric. Res., 22(1):59-63.
- Mohanty, B.K. and Prusti, A.M. (2002). Variability and selection parameters for economic characters in brinjal. Orissa J. Hort., 30(1):1-4.
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- Genetic Divergence in Vegetable Cowpea (Vigna unguiculata L.)
Authors
1 Department of Vegetable Science, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.), IN
2 Pt. K.L.S. College of Horticulture and Research Station (I.G.K.V.), Rajnandgaon (C.G.), IN
Source
The Asian Journal of Horticulture, Vol 11, No 2 (2016), Pagination: 323-328Abstract
Twenty one genotypes of vegetable cowpea including checks were planted in Randomized Block Design at the experimental farm of Pt.K.L.S.College of Horticulture and Research Station, Rajnandgaon, during 2015-16. The data recorded on twenty one characters were subjected to analysis of variance. The analysis of variance revealed highly significant differences among the genotypes for all the characters studied except pod width. It indicates that sufficient variability exhisted among the genotype for the mentioned characters. The GCV value was higher for plant height, pod yield per plant indicated that these characters exhibited variability among the genotypes. The highest heritability was recorded for the characters plant height (60DAS), days of maturity , fruiting duration, 50 per cent flowering ,pod setting per cent per plant, 100 dry seed weight, 100-green seed weight. The genetic divergence in the present study observed among 21 genotypes of vegetable cowpea, showed low quantum of divergence and was grouped into five clusters On the basis of D2 analysis. Maximum number of genotypes (9) was accommodated in cluster - II. The average inter and intra cluster divergence (D) values had also been calculated. The intra-cluster distance varied from 0.00 to 5.04. The maximum intra cluster distance was shown by cluster I (5.04) followed by cluster V, cluster II, cluster III and cluster IV. The maximum inter cluster distance was observed in between cluster I and V (5.04). The cluster III showed maximum value for mean green pod yield (146.820g.) followed by cluster IV (146.156g). Crossing between the genotypes of maximum two clusters appeared to be most promising to combine the desirable characters.
Keywords
Genetic Divergence, D2 Analysis, Vegeatable Cowpea (Vigna unguiculata L.).- Early Generation Selection for Green Pod Yield and its Components in Vegetable Cowpea [Vigna unguiculata (L.) Walp.]
Authors
1 Department of Vegetable Science, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.), IN
2 Department of Genetics and Plant Breeding, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.), IN
3 Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.), IN
Source
The Asian Journal of Horticulture, Vol 10, No 1 (2015), Pagination: 1-10Abstract
Correlation and path co-efficient analysis were carried out in parents, F1 and F2 generations of 6 × 4 parental line x tester cross in cowpea. Experiment comprising of 60 diverse vegetable cowpea genotypes was carried out at Horticultural research cum instructional farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur during Kharif of 2008. The result of correlation study in all three generations showed that green pod yield per plant had significant and positive correlation with number of pods per plant, pod length and pod weight. In base population, F1 and F2 the path analysis revealed that number of pods per cluster, days to final picking, pod weight and fruiting duration expressed a highest positive direct effect on green pod yield per plant, respectively. The correlation and path analysis studies revealed that 100 seed weight, pod weight, pod length and number of pods per plant were major components of green pod yield in early generations of vegetable cowpea. Hence, the direct selection in form of selection indices based on these component characters would be effective in development of high yielding genotypes of vegetable cowpea.