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Vanishree ¹, R. Lokesha ², Renuka Goudappagoudar ², Chetankumar N. Banakar ²

Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, IN
2 Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Raichur, Karnataka, IN

Abstract

One hundred and twenty four F₄ families of sesame derived from straight and reciprocal crosses made between E-8 (commercial cultivar) and Tamil Nadu Local (land race) were evaluated during Kharif, 2010 to assess genetic variability, heritability (broad sense) and genetic advance for ten quantitative characters. Analysis of variance revealed highly significant difference among the F₄ families for days to 50 per cent flowering, days to maturity, plant height, number of branches per plant, number of capsules per plant, distance from ground to first capsule and number of seeds per capsule. High GCV and PCV were observed for branches per plant, capsules per plant and seed yield per plant. High heritability coupled with high genetic advance as per cent mean was observed for plant height, branches per plant, capsules per plant, capsule length, distance from ground to first capsule, seeds per capsule, 1000 seed weight and seed yield per plant.

Keywords

Sesame, F₄ Families, Genetic Variability, Heritability, Genetic Advance

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Deepa P. Salunke ¹, R. Lokesha ²

Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad, Karnataka, IN
2 Department of Genetics and Plant Breeding, University of Agricultural Sciences, Raichur, Karnataka, IN

Abstract

The combining ability was studied to identify the best specific cross combinations in sesame(Sesame Indicum L.) through diallel analysis with seven parents. Eight characters viz., days to maturity, plant height, number of branches per plant, number of capsules per plant, number of seeds per capsule, 1000 seed weight and seed yield per plant and oil yield per plants were studied. Based on the general combining ability effects of parents DSS-9 was found to be good general combiner for days to maturity, plant height and number of capsules per plant, 1000 seed weight, seed yield per plant and oil yield per plant, number of branches per plant followed by Dhauri Local. The cross combination Gowry x JCT-7 showed negative significant sca for days to maturity. Dhauri Local x DSS- 9 showed positive and significant sca effect for the traits, number of capsules per plant and seed yield and oil yield per plant followed by DSS-9 X RT-54 and hence recommended for yield improvement.

Keywords

Sesame, General Combining Ability, Specific Combining Ability

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Renuka Goudappagoudar ¹, R. Lokesha ¹, Vanishree ²

Affiliations
1 Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Raichur, Karnataka, IN
2 Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, IN

Abstract

In order to study inheritance of alternaria blight resistance in sesame, straight and reciprocal crosses were made between RT-273 (resistant) and Gulbarga local black (susceptible) during Kharif-2007. Screening of F₂ and F₃ progenies against Alternaria blight, and segregation analysis showed that resistance is governed by single dominant gene. Further screening of F₄ families under field condition during Kharif-2010 confirmed the single dominant gene governing the Alternaria blight resistance in cultivated sesame.

Keywords

Sesame, F₄ Families, Alternaria Blight Resistance, Dominant Gene

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Deepa P. Salunkhe ¹, R. Lokesha ²

Affiliations
1 University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Genetics and Plant Breeding, University of Agricultural Sciences, Raichur (Karnataka), IN

Abstract

A combining ability analysis was carried out in a 7 × 7 diallel mating system for nine quantitative characters in sesame. The results revealed that the variance due to gca, sca and rca were highly significant, denoting the importance of both additive as well as non additive genetic components for yield and yield contributing characters. The magnitude of the gca variance was higher than the sca variance. The magnitude of the latter, when compared to the variance due to the reciprocal effect, was highly significant and higher for the characters, number of capsules per plant, number of seeds per capsule, while the magnitude of the rca variance was highly significant and higher than the sca variance for the characters days to maturity, plant height, number of branches per plant, number of capsules per plant, capsule length, 1000 seed weight and seed yield per plant. This indicated the presence of reciprocal effects for these characters as both additive and non-additive genetic components are involved for yield and yield contributing traits. The additive genetic variances could be improved in the future by a simple selection, whereas no fixable genetic variances can be improved by following biparental mating of the F₂ generation.

Keywords

Combining Ability, Dialled Analysis, GCA, SCA, RCA.

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