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P-ISSN: 2349-8528, E-ISSN: 2321-4902   |   

Vol. 8, Issue 2 (2020)

Combining ability studies in tomato for yield and processing traits


Author(s): P Arun Kumar, K Ravinder Reddy, RVSK Reddy, SR Pandravada and P Saidaiah

Abstract: The experiment was conducted during 2014-16 at Vegetable Research Station of Sri Konda Laxman Telangana State Horticultural University at Hyderabad falls under the Southern Telangana zone, India. The treatment comprises thirty F1 hybrids along with eleven parents (five lines and six testers) and three commercial checks i.e. US-440, Arka Rakshak and NS-516. The experimental material was evaluated in Randomized Block Design with three replications under three diverse times. Nineteen observations were recorded relating to yield and quality traits. Estimates of SCA variance were higher than GCA variance with the ratio of GCA variance to SCA variance (σ2gca/σ2sca) lower than unity (<1) except days to 50% flowering, fruit pH, titrable acidity and lycopene content indicating the preponderance of non-additive gene action. Among the parents EC-620360 tops first followed by EC-608415, EC-619982, Punjab Chhuhara, Pusa Ruby and EC-520078 and among crosses EC-620428 × Arka Abha ranks first followed by EC-620360 × Pusa Ruby, EC-608415 × Arka Saurabh, EC- 608415 × Arka Abha and EC-608415 × Punjab Chhuhara. The predominance of non-additive gene action over the additive component, which is ideal for exploitation through heterosis breeding. In few cases, crosses with both good general combiner parents had also exhibited high sca effects, indicating the role of additive × additive type of gene action offering a good scope for fixation of the heterotic effects through the isolation of high yielding homozygous lines in advanced generations.

DOI: 10.22271/chemi.2020.v8.i2ab.9026

Pages: 1817-1830  |  666 Views  123 Downloads

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How to cite this article:
P Arun Kumar, K Ravinder Reddy, RVSK Reddy, SR Pandravada, P Saidaiah. Combining ability studies in tomato for yield and processing traits. Int J Chem Stud 2020;8(2):1817-1830. DOI: 10.22271/chemi.2020.v8.i2ab.9026
 

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