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Title: Genetic Study of Heterosis for Yield Fruit Quality and Leaf Curl Resistance in Tomato Solanum lycopersicum L Genotypes
Researcher: Kerketta Anita
Guide(s): Vijay B.Rajwade
Keywords: Agricultural Sciences
Life Sciences
University: Sam Higginbottom Institute of Agriculture, Technology and Sciences
Completed Date: 2020
Abstract: In the present investigation, information on magnitude of heterosis and combining ability were obtained for yield, fruit quality and leaf curl resistance in tomato genotypes using Line x Tester analysis involving ten lines, three testers and its resultant 30 hybrids along with one standard check (Kashi Abhiman) tested at Horticulture Research Farm, Department of Horticulture, NAI, SHUATS, Prayagraj (Allahabad) during late kharif in two season 201617 and 2017-18 in a randomized block design with three replications. High per se performance for fruit yield/ plant has been observed in parents Pant T-7 (3.68 kg) and in cross combination Pant T-7 x Kashi Aman (4.44 kg). Analysis of variance showed significant difference among genotypes (Parents + F1s) for all the characters. The results revealed that the experimental material had sufficient diversity or variation was present. The differences among parents were significant for all the traits except plant height, branches/ plant, flower clusters/ plant; fruit set/ cluster; fruit weight, fruit yield/ plant, lycopene, leaf curl incidence and leaf curl severity. High heterosis in desirable direction over standard check was observed in respect of all the characters except days to first flowering, days to 50% flowering, fruit weight and lycopene. The standard heterosis for fruit yield ranged from -67.19 to 29.70% (Check-1). Five crosses viz., Arka Abha x Kashi Aman, Arka Abha x Kashi Vishesh, Pant T-7 x Kashi Vishesh, S-22 x H-88-78-5 and Pant T-7 x Kashi Aman exhibited sufficient amount of significant and positive heterosis for fruit yield over standard check. The highly heterotic cross, S-22 x H-88-78-5 showed high SCA effect for fruit yield. SCA variance were greater than GCA variance majority of the character except viz., flower/ cluster, flower cluster/ plant, average fruit weight and shelf life indicating that predominance of non-additive gene actions for all the characters under study. While, the magnitude of variance due to SCA were higher than those of GCA fo
Appears in Departments:Department of Horticulture

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