Assessment of Heterosis and Combining Ability for Quality Traits in Tomato (Solanum lycopersicum L.) Using Line × Tester Analysis
Amarjeet Kaur
Department of Agriculture, Khalsa College, Patiala, Punjab 147001, India.
Vijay Kumar *
Department of Genetics and Plant Breeding, School of Agricultural Sciences, IIMT University, Meerut, Uttar Pradesh 250001, India.
Ravindra Kumar
Department of Agriculture, Mata Gujri College Fatehgarh Sahib, Punjab 140407, India.
*Author to whom correspondence should be addressed.
Abstract
The present study Explored about heterosis and combining ability analysis for quality traits in tomato (Solanum lycopersicum L.) Using Line × Tester analysis. Heterosis and combining capacity are two vital contemplations within the utilization of heterosis, which can be utilized to produce amazing hybrid asset candidates and is exceptionally vital in customary hybrid breeding. The combining capacity and heterosis of eight major agronomic characteristics were analyzed in 8 tomato guardians and 15 crosses between them. As well as EC- 163605, a recognized and official great assortment that's as of now offering well on the showcase was utilized as a control to conduct a control heterosis examination, with the objective of selecting perfect parents with tall combining capacity and modern hybrids with product esteem, plant tallness, natural product distance across, add up to abdicate per plant. The comes about appears that both additive and non-additive hereditary impacts are included within the expression of the characteristics and the additive hereditary impact is prevailing in characteristic legacy. In spite of the fact that common combining capacity (GCA) and specific combining capacity (SCA) were not correlated, and the quality of heterosis depends on SCA, the entirety of the parental GCA values (GCA sum) did predict heterosis for a few characteristics with higher predictive accuracy than did SCA. The variance attributable to GCA and SCA, which provide a relative measure of additive and non-additive gene effects, respectively, is estimated using the combining ability analysis. Because most yield components are known to be polygenic, plant breeders would need to perform phenotypic assessments on as many parents as feasible to determine their genetic makeup.
Keywords: Combining ability, heterosis, line × tester, tomato, vegetable crops