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University of Horticultural Sciences, Bagalkot (2017)

DEVELOPMENT AND EVALUATION OF TOMATO HYBRIDS FOR DROUGHT AND TOLCV TOLERANCE AND IDENTIFICATION OF STABLE CHERRY TOMATO LINES

GOWDA, ANURAG S.

Titre : DEVELOPMENT AND EVALUATION OF TOMATO HYBRIDS FOR DROUGHT AND TOLCV TOLERANCE AND IDENTIFICATION OF STABLE CHERRY TOMATO LINES

Auteur : GOWDA, ANURAG S.

Université de soutenance : University of Horticultural Sciences, Bagalkot

Grade : Master of Science (MS) 2017

Résumé
Twenty crosses were developed by using different nine genotypes in Line x Tester in randomized complete block design to study magnitude and direction of heterosis for fruit yield and quality traits, to estimate the combining ability, variance and effects of traits at Kittur Rani Channamma College of Horticulture, Arabhavi (Karnataka) during 2016-17. Among the parents, good gca for yield per plant was exhibited by the L01942 and TKB133 whereas, for ToLCV the testers L01942, L06052, TLB133 and TKB133 are moderately resistant. The magnitude of heterosis over standard check (Arka Rakshak), ranged from 9.23 to 49.99 per cent for plant height, -56.42 to 10.34 per cent for days to first flowering, -18.33 to 52.06 per cent for number of fruits per plant, -46.45 to 37.73 for fruit yield per plant, -58.66 to 10.01 per cent for fruit yield per plot. Out of 20 hybrids, three were moderately resistant, nine were moderately susceptible, seven were susceptible and one was highly susceptible. Maximum resistance for ToLCV was observed in the cross EC-61066 X L01942 (14.25%) followed by EC- 610652 X L01942 (16.97%) and EC- 610652 X TKB133 (18.00%). The cross EC- 61066 X L01942 was found to be exhibiting higher resistance with desired significant sca effect for yield contributing traits like average fruit weight per plant and fruit quality traits like ascorbic acid. It also exhibited standard heterosis over check hybrid for number of fruits per plant, average fruit per plant, yield per plant and yield per plot.

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