Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810143061
Authors: Kerketta, Anita
Advisor: Bahadur, Dr. Vijay
Title: Genetic Study of Heterosis for Yield, Fruit Quality and Leaf Curl Resistance in Tomato (Solanum lycopersicum L.) Genotypes
Publisher: DEPARTMENT OF HORTICULTURE NAINI AGRICULTURAL INSTITUTE SAM HIGGINBOTTOM UNIVERSITY OF AGRICULTURE, TECHNOLOGY AND SCIENCES, PRAYAGRAJ - 211007
Language: en
Type: Thesis
Pages: 193p.
Agrotags: null
Keywords: Keywords: Tomato, Genotypes, Heterosis, Combining ability, Yield, Fruit Quality & Leaf Curl Resistance (ToLCV).
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 2016- 17 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 for remaining characters indicating the predominance role of non-additive gene action in the inheritance of these traits. Among parents Pant T-7, Arka Abha, Kashi Aman and S-22 emerged as good general combiners for majority of the characters studied for experiment. The best general combiners based on GCA and best parents based on per se performance were Days to first flowering and Days to 50% flowering (Arka Abha), Acidity (Pant T-7) and Shelf life (Kashi Sharad). Parents viz., Pant T-7 exhibited high positive significant GCA effects which is desirable. Five crosses exhibited positive and significant SCA effects for fruit yield 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 manifested high heterosis coupled with high SCA effects for fruit yield. The parental and hybrid per se performance for majority of the characters was positively and significantly correlated with their GCA and SCA effects, respectively. Pest and disease incidence analysis revealed that none of the parents and hybrids were immune or highly resistant to ToLCV incidence and severity. Among Parents viz., Arka Vikash, Azad T-5, Angoorlata and H-88-78-5, Kashi Aman, Kashi Vishesh, and Cross combinations viz., Azad T-5 x Kashi Aman and Pant T-7 x Kashi Aman were found resistant while, Pant T-7 x Kashi Aman, Pant T-7 x Kashi Vishesh, , Arka Vikash x Kashi Aman, Arka Vikash x Kashi Vishesh, Arka Vikash x H-88-78-5, Pant T-7 x Kashi Vishesh, Azad T-6 x Kashi Vishesh, S-22 x Kashi Aman, Arka Abha x H-88-78-5, Kashi Sharad x Kashi Aman, Kashi Sharad x Kashi Vishesh, Kashi Sharad x H-88-78-5, Hisar Lalit x Kashi Aman, Azad T-5 x Kashi Aman, Azad T-5 x H-88-78-5, Angoorlata x Kashi Aman, Angoorlata x Kashi Vishesh, Angoorlata x H-88-78-5, Pant T-7 x Kashi Aman, Pant T-7 x Kashi Vishesh, Pant T-7 x H-88-78-5 found resistant exhibited moderate resistance against ToLCV. Parents Kashi Aman was identified Ty-3 gene and H-88-78-5 with Ty-2 gene. Cross combination viz., Kashi Aman x Arka Vikash, Kashi Aman x Pant T-5, Kashi Aman x S-22, Kashi Aman x Kashi Sharad, Kashi Aman x Azad T-5 and Kashi Aman x Pant T-5 were found with Ty-3 gene and H-88-78-5 x Azad T-6 and H-88-78-5 x Kashi Sharad were identified with Ty-2 gene for resistance to ToLCV.
Description: Ph. D. Thesis
Subject: Horticulture
Theme: Genetic Study of Heterosis for Yield, Fruit Quality and Leaf Curl Resistance in Tomato (Solanum lycopersicum L.) Genotypes
Research Problem: Genetic Study of Heterosis for Yield, Fruit Quality and Leaf Curl Resistance in Tomato (Solanum lycopersicum L.) Genotypes
These Type: Ph.D
Issue Date: 2020
Appears in Collections:Thesis

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