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A. Shafeeq ¹, Madhusudan Rao ¹, R. R. Hanchinal ², Shashikala S. Kolakar ³

Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad, Karnataka, IN
2 University of Agricultural Sciences, Dharwad, Karnataka, IN
3 College of Horticulture, Mudigere, Karnataka, IN

Abstract

24 F₁ hybrids developed by crossing 6 lines and 4 tester in line x tester design were subjected to combining ability analysis for yield and other characters. Both additive and non additive gene actions were observed for all the characters. Among the ten parents, the general good combiners were Arka sheel and Arka shirish. These parents also had high gca effects for average fruit weight, fruit length, number of fruits per clusters, number of leaves, number of branches at one month after transplanting, plant height at final harvest and seedling height at transplanting. In 24 crosses (Arka sheel x Green round and Arka sheel x Kudachi A) having positive x positive gca effects reveals that the high sca effects in these crosses was mainly through additive gene effects. Therefore, the best option for improvement is the identification of transgressive segregants based on sca effects which may lead to isolation of promising lines of high total yield in brinjal.

Keywords

Brinjal, Combining Ability, Gca, Sca Effects

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A. Shafeeq ¹, R. R. Hanchinal ², Shashikala S. Kolakar ³

Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad, Karnataka, IN
2 University of Agricultural Sciences, Dharwad, Karnataka, IN
3 College of Horticulture, Mudigere, Karnataka, IN

Abstract

A study was conducted to assess the magnitude of heterosis in a line x tester cross material involving 24 hybrids generated by crossing six lines with four testers and a standard check (Kalpataru) in brinjal during 2004-05 at Vegetable Research and Seed Production Section of Seed Unit, University of Agricultural Sciences, Dharwad. The analysis of variance indicated significant amount of variability among the genotypes for 15 of the 17 traits studied. Significant and standard heterosis in desirable direction was recorded by six hybrids for fruit yield. The present study revealed the direct relationship between heterosis and per se performance of hybrids for several characters. Among the hybrids studied Arka Sheel x Green Round, Arka Sheel x Kudachi Local A and Budihal Local x Green Round were found to be the best cross combinations for fruit yield and its components.

Keywords

Lines, Tester, Heterosis, Hybrid Vigour

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