African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Genetic study of heterosis for yield and quality components in tomato (Solanum lycopersicum)

Sunil K. Yadav1, B. K. Singh1, D. K. Baranwal2 and S. S. Solankey3*
1Department of Horticulture, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India – 221 005. 2Department of Plant Breeding and Genetics, Bihar Agricultural University, Sabour (Bhagalpur), Bihar - 813 210. 3Department of Horticulture (Vegetable and Floriculture), Bihar Agricultural University, Sabour (Bhagalpur), Bihar - 813 210.
Email: [email protected]

  •  Accepted: 24 September 2013
  •  Published: 14 November 2013

Abstract

Magnitude of heterosis, combining ability effects and its variances were estimated by line × tester analysis including 30 F1 cross combinations using 13 parents after selfing (ten lines and three testers) at Vegetable Research Farm, BHU, Varanasi (India). These 43 genotypes (10 lines and 3 testers and 30 resulting F1 hybrids) were evaluated for growth, yield and quality (T.S.S and shelf life) contributing traits. Ratio of general combining ability (GCA) and specific combining ability (SCA) variance revealed preponderance of non- additive genetic variances for all studied traits. On the basis of GCA effects across ten traits, Potato Leaf, Pant T-7, IC-177371 and NDTVR-60 were identified as most promising parental lines for inclusion in hybridization programmes. Outstanding crosses based on SCA effect across ten traits were RCMT-2 × VR-20, LCT-6 × VR-20 and Azad T-5 × VR-20. These crosses could be considered as most promising specific combiner for most of the traits in which VR-20 was have found to be best general combiner. The most promising crosses showing significantly standard heterosis for maximum yield were CO-3 × Arka Vikas, CO-3 × NDT-5, NDTVR-60 × NDT-5 and RCMT-1 × NDT-5. These elite hybrids may be tested for yield and other quality traits under different agro-climatic conditions for commercial exploitation of hybrid vigour.

Key words: Analysis of variance (ANOVA), heterosis, general combining ability (GCA), specific combining ability (SCA), Line × Testers.