Genetic analysis to identify good combiners for ToLCV resistance and yield components in tomato using interspecific hybridization

Journal of genetics

S. N. Singh²  Ramesh K. Singh¹  Major Singh¹  N. Rai1¹  K. Srivastava³ 

[1] Crop Improvement Division, Indian Institute of Vegetable Research, Banaras Hindu University, Varanasi 221 305, India$$;Department of Botany, Udai Pratap Autonomous College, Varanasi 221 002, India$$;Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, India$$

关键词: tomato;    ToLCV;    molecular diversity;    interspecific crosses;    combining ability.;   

DOI  :  

学科分类：生物科学（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The interspecific hybridization for tomato leaf curl virus (ToLCV) resistance was carried out among 10 genetically diverse tomato genotypes (diversified by 50 SSR markers). Among the 10 parents, four susceptible cultivars of Solanum lycopersicum were crossed with six resistant wilds, such as S. pimpinellifolium, S. habrochaites, S. chemielewskii, S. ceraseforme, S. peruvianum and S. chilense in a line × tester mating design. All the 24 hybrids and their parents were grown in the field and glasshouse conditions to determine the general-combining abilities (GCA) and specific-combining abilities (SCA). The variances due to SCA and GCA showed both additive and nonadditive gene effects. Based on GCA estimates, EC-520061 and WIR-5032 were good general combiners while based on SCA estimates, PBC × EC-520061 and PBC × EC-521080 were best specific combiners for coefficient of infection and fruit yield per plant in both the environments. These lines could be selected and utilized in ToLCV resistance and high yield breeding programme for improving the traits.

【 授权许可】

Unknown