Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810130237
Authors: TEKKAM SHIRISHA
Advisor: Dr. P. SAIDAIAH
Title: STUDIES ON HETEROSIS, COMBINING ABILITY FOR YIELD AND YIELD CONTRIBUTING TRAITS AND SCREENING FOR YELLOW LEAF CURL VIRUS RESISTANCE IN TOMATO (Solanum lycopersicum L.)
Publisher: College of Horticulture, Rajendranagar, HYD-30
Citation: Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30
Language: en
Type: Thesis
Pages: 282
Agrotags: null
Keywords: HETEROSIS, COMBINING ABILITY, YIELD AND YIELD CONTRIBUTING TRAITS AND SCREENING, YELLOW LEAF CURL VIRUS RESISTANCE
Abstract: The present investigation entitled “ Studies on heterosis, combining ability for yield and yield contributing traits and screening for yellow leaf curl virus resistance in tomato (Solanum lycopersicum L.)” was conducted during Kharif, 2018 and Summer, 2019 at College of Horticulture, Rajendranagar, Sri Konda Laxman Telangna State Horticultural University, Hyderabad with aim to develop more heterotic hybrids. The main objectives of the investigation were to estimate the magnitude of heterosis and estimation of gca and sca effects of the parents and hybrids, respectively for yield contributing traits and resistance for yellow leaf curl virus. Line x Tester mating design was followed using seven lines (Pusa Ruby, EC 620441, EC 914100, EC 914093, EC 620481 and EC 620452) and three testers (AVTO 1219, AVTO 1314 and Money Maker) to produce twenty one hybrids. The hybrids along with ten parents and three checks (Arka Rakshak, Arka Vikas and PKM-1) were evaluated in Rabi, 2019 in Randomized Block Design with three replications to study heterosis and combining ability of fifteen yield and yield related traits viz., plant height (cm), number of flowers per cluster, days to first flowering, number of marketable fruits per plant, fruit length (cm), fruit width (cm), average fruit weight (g), fruit yield/ plant (kg), ascorbic acid content (mg/100g), TSS (0Brix), beta carotene(mg/100g) and lycopene content (mg/100g). Analysis of variance of RBD revealed that replication mean sum squares due to parents and hybrids were non-significant for all the traits studied, so there is no environmental error in controlling these characters. Treatment sum of squares due to parents and hybrids were highly significant for all the traits, indicating that there is lot of variation among the characters studied. Line x Tester mating design revealed that replication mean sum squares due to parents were non-significant for all the traits. Treatment sum of square due to parents were significant for all the traits. Line effect and Tester effect showed similar significant results to plant height (cm), number of marketable fruits per plant, average fruit weight (g), fruit yield per plant (kg), ascorbic acid content (mg/100g), betacarotene (mg/100g) and lycopene content (mg/100g). Line x Tester effect was significant for all the characters except beta-carotene (mg/100g). The mean performance of the five crosses i.e., EC 620452 x Money Maker (3.25kg), Pusa Ruby x Money Maker (3.19kg), EC 914090 x Money Maker (3.18kg), EC 620441 x Money Maker (3.15kg) and Pusa Ruby x AVTO 1219(3.14kg) were found superior over the standard check Arka Rakshak (2.49kg). The ratios GCA/SCA variances revealed that non-additive gene action was predominant for these characters. Hence, heterosis breeding is ideal to improve these traits. The gca effects of the parents revealed that three lines viz., Pusa ruby, EC 620441 and Money Maker were found to be general combiners for yield per plant and most of the other traits. Hence, these inbreds are to be utilized for potential yield application in crop improvement programmes. Based on significant sca effects, six hybrids viz., EC 620441 x AVTO 1314, Pusa Ruby x AVTO 1219, EC 914090 x Money Maker, EC 620452 x Money Maker, EC 620452 x AVTO 1314 and EC 914093 x AVTO 1219 were found to be promising specific combiners for yield per plant and most of the other traits. These hybrids showed presence of positive alleles in them. significant and standard heterosis over standard check Arka Rakshak for fruit yield per plant was recorded in six hybrids viz., EC 620452 x Money Maker (30.48%), Pusa Ruby x Money Maker (28.07%), EC 914090 x Money Maker (27.81%), EC 620441 x AVTO 1314 (26.47%), Pusa Ruby x AVTO 1219 (25.94%) and EC 620441 x Money Maker (24.06%). Among the twenty one hybridsscreened for yellow leaf curl virus resistance, nine hybrids viz., Pusa Ruby x AVTO 1314, EC 914100 x AVTO 1219, EC 914100 x AVTO 1314, EC 914093 x AVTO 1314, EC 914093 x AVTO 1314, EC 914090 x AVTO 1314, EC 620481 x AVTO1219, EC 620481 x AVTO1314 and EC 620452 x AVTO 1314 were recorded high resistance, while six hybrids were resistant and four hybrids were moderately resistance. One hybrid was moderately susceptible. Keeping in view of the above facts and by considering all the factors like mean performance, sca effects and standard heterosis, five hybrids viz., EC 620452 x Money Maker (3.25kg,0.30kg and30.48%), Pusa Ruby x Money Maker (3.19kg, -0.15kg and 28.07%), EC 914090 x Money Maker (3.18kg, 0.31kg and27.81%), EC 620441 x AVTO 1314 (3.15kg, 0.40kg and 26.47%) and Pusa Ruby x AVTO 1219 (3.14kg, 0.31kg and25.94%) were the most promising hybrids for yield and yield related traits exploitation. These hybrids may be further tested over locations, seasons and years then recommended for commercial cultivation. Two hybrids i.e., EC 620441 x AVTO 1314 and Pusa Ruby x AVTO 1314 were showed high yield per plant coupled with yellow leaf curl virus resistant may be used for cultivation in ToLCV problematic areas.
Description: The present investigation entitled “ Studies on heterosis, combining ability for yield and yield contributing traits and screening for yellow leaf curl virus resistance in tomato (Solanum lycopersicum L.)” was conducted during Kharif, 2018 and Summer, 2019 at College of Horticulture, Rajendranagar, Sri Konda Laxman Telangna State Horticultural University, Hyderabad with aim to develop more heterotic hybrids. The main objectives of the investigation were to estimate the magnitude of heterosis and estimation of gca and sca effects of the parents and hybrids, respectively for yield contributing traits and resistance for yellow leaf curl virus. Line x Tester mating design was followed using seven lines (Pusa Ruby, EC 620441, EC 914100, EC 914093, EC 620481 and EC 620452) and three testers (AVTO 1219, AVTO 1314 and Money Maker) to produce twenty one hybrids. The hybrids along with ten parents and three checks (Arka Rakshak, Arka Vikas and PKM-1) were evaluated in Rabi, 2019 in Randomized Block Design with three replications to study heterosis and combining ability of fifteen yield and yield related traits viz., plant height (cm), number of flowers per cluster, days to first flowering, number of marketable fruits per plant, fruit length (cm), fruit width (cm), average fruit weight (g), fruit yield/ plant (kg), ascorbic acid content (mg/100g), TSS (0Brix), beta carotene(mg/100g) and lycopene content (mg/100g). Analysis of variance of RBD revealed that replication mean sum squares due to parents and hybrids were non-significant for all the traits studied, so there is no environmental error in controlling these characters. Treatment sum of squares due to parents and hybrids were highly significant for all the traits, indicating that there is lot of variation among the characters studied. Line x Tester mating design revealed that replication mean sum squares due to parents were non-significant for all the traits. Treatment sum of square due to parents were significant for all the traits. Line effect and Tester effect showed similar significant results to plant height (cm), number of marketable fruits per plant, average fruit weight (g), fruit yield per plant (kg), ascorbic acid content (mg/100g), betacarotene (mg/100g) and lycopene content (mg/100g). Line x Tester effect was significant for all the characters except beta-carotene (mg/100g). The mean performance of the five crosses i.e., EC 620452 x Money Maker (3.25kg), Pusa Ruby x Money Maker (3.19kg), EC 914090 x Money Maker (3.18kg), EC 620441 x Money Maker (3.15kg) and Pusa Ruby x AVTO 1219(3.14kg) were found superior over the standard check Arka Rakshak (2.49kg). The ratios GCA/SCA variances revealed that non-additive gene action was predominant for these characters. Hence, heterosis breeding is ideal to improve these traits. The gca effects of the parents revealed that three lines viz., Pusa ruby, EC 620441 and Money Maker were found to be general combiners for yield per plant and most of the other traits. Hence, these inbreds are to be utilized for potential yield application in crop improvement programmes. Based on significant sca effects, six hybrids viz., EC 620441 x AVTO 1314, Pusa Ruby x AVTO 1219, EC 914090 x Money Maker, EC 620452 x Money Maker, EC 620452 x AVTO 1314 and EC 914093 x AVTO 1219 were found to be promising specific combiners for yield per plant and most of the other traits. These hybrids showed presence of positive alleles in them. significant and standard heterosis over standard check Arka Rakshak for fruit yield per plant was recorded in six hybrids viz., EC 620452 x Money Maker (30.48%), Pusa Ruby x Money Maker (28.07%), EC 914090 x Money Maker (27.81%), EC 620441 x AVTO 1314 (26.47%), Pusa Ruby x AVTO 1219 (25.94%) and EC 620441 x Money Maker (24.06%). Among the twenty one hybridsscreened for yellow leaf curl virus resistance, nine hybrids viz., Pusa Ruby x AVTO 1314, EC 914100 x AVTO 1219, EC 914100 x AVTO 1314, EC 914093 x AVTO 1314, EC 914093 x AVTO 1314, EC 914090 x AVTO 1314, EC 620481 x AVTO1219, EC 620481 x AVTO1314 and EC 620452 x AVTO 1314 were recorded high resistance, while six hybrids were resistant and four hybrids were moderately resistance. One hybrid was moderately susceptible. Keeping in view of the above facts and by considering all the factors like mean performance, sca effects and standard heterosis, five hybrids viz., EC 620452 x Money Maker (3.25kg,0.30kg and30.48%), Pusa Ruby x Money Maker (3.19kg, -0.15kg and 28.07%), EC 914090 x Money Maker (3.18kg, 0.31kg and27.81%), EC 620441 x AVTO 1314 (3.15kg, 0.40kg and 26.47%) and Pusa Ruby x AVTO 1219 (3.14kg, 0.31kg and25.94%) were the most promising hybrids for yield and yield related traits exploitation. These hybrids may be further tested over locations, seasons and years then recommended for commercial cultivation. Two hybrids i.e., EC 620441 x AVTO 1314 and Pusa Ruby x AVTO 1314 were showed high yield per plant coupled with yellow leaf curl virus resistant may be used for cultivation in ToLCV problematic areas.
Subject: Vegetable Science
Theme: The present investigation entitled “ Studies on heterosis, combining ability for yield and yield contributing traits and screening for yellow leaf curl virus resistance in tomato (Solanum lycopersicum L.)” was conducted during Kharif, 2018 and Summer, 2019 at College of Horticulture, Rajendranagar, Sri Konda Laxman Telangna State Horticultural University, Hyderabad with aim to develop more heterotic hybrids. The main objectives of the investigation were to estimate the magnitude of heterosis and estimation of gca and sca effects of the parents and hybrids, respectively for yield contributing traits and resistance for yellow leaf curl virus. Line x Tester mating design was followed using seven lines (Pusa Ruby, EC 620441, EC 914100, EC 914093, EC 620481 and EC 620452) and three testers (AVTO 1219, AVTO 1314 and Money Maker) to produce twenty one hybrids. The hybrids along with ten parents and three checks (Arka Rakshak, Arka Vikas and PKM-1) were evaluated in Rabi, 2019 in Randomized Block Design with three replications to study heterosis and combining ability of fifteen yield and yield related traits viz., plant height (cm), number of flowers per cluster, days to first flowering, number of marketable fruits per plant, fruit length (cm), fruit width (cm), average fruit weight (g), fruit yield/ plant (kg), ascorbic acid content (mg/100g), TSS (0Brix), beta carotene(mg/100g) and lycopene content (mg/100g). Analysis of variance of RBD revealed that replication mean sum squares due to parents and hybrids were non-significant for all the traits studied, so there is no environmental error in controlling these characters. Treatment sum of squares due to parents and hybrids were highly significant for all the traits, indicating that there is lot of variation among the characters studied. Line x Tester mating design revealed that replication mean sum squares due to parents were non-significant for all the traits. Treatment sum of square due to parents were significant for all the traits. Line effect and Tester effect showed similar significant results to plant height (cm), number of marketable fruits per plant, average fruit weight (g), fruit yield per plant (kg), ascorbic acid content (mg/100g), betacarotene (mg/100g) and lycopene content (mg/100g). Line x Tester effect was significant for all the characters except beta-carotene (mg/100g). The mean performance of the five crosses i.e., EC 620452 x Money Maker (3.25kg), Pusa Ruby x Money Maker (3.19kg), EC 914090 x Money Maker (3.18kg), EC 620441 x Money Maker (3.15kg) and Pusa Ruby x AVTO 1219(3.14kg) were found superior over the standard check Arka Rakshak (2.49kg). The ratios GCA/SCA variances revealed that non-additive gene action was predominant for these characters. Hence, heterosis breeding is ideal to improve these traits. The gca effects of the parents revealed that three lines viz., Pusa ruby, EC 620441 and Money Maker were found to be general combiners for yield per plant and most of the other traits. Hence, these inbreds are to be utilized for potential yield application in crop improvement programmes. Based on significant sca effects, six hybrids viz., EC 620441 x AVTO 1314, Pusa Ruby x AVTO 1219, EC 914090 x Money Maker, EC 620452 x Money Maker, EC 620452 x AVTO 1314 and EC 914093 x AVTO 1219 were found to be promising specific combiners for yield per plant and most of the other traits. These hybrids showed presence of positive alleles in them. significant and standard heterosis over standard check Arka Rakshak for fruit yield per plant was recorded in six hybrids viz., EC 620452 x Money Maker (30.48%), Pusa Ruby x Money Maker (28.07%), EC 914090 x Money Maker (27.81%), EC 620441 x AVTO 1314 (26.47%), Pusa Ruby x AVTO 1219 (25.94%) and EC 620441 x Money Maker (24.06%). Among the twenty one hybridsscreened for yellow leaf curl virus resistance, nine hybrids viz., Pusa Ruby x AVTO 1314, EC 914100 x AVTO 1219, EC 914100 x AVTO 1314, EC 914093 x AVTO 1314, EC 914093 x AVTO 1314, EC 914090 x AVTO 1314, EC 620481 x AVTO1219, EC 620481 x AVTO1314 and EC 620452 x AVTO 1314 were recorded high resistance, while six hybrids were resistant and four hybrids were moderately resistance. One hybrid was moderately susceptible. Keeping in view of the above facts and by considering all the factors like mean performance, sca effects and standard heterosis, five hybrids viz., EC 620452 x Money Maker (3.25kg,0.30kg and30.48%), Pusa Ruby x Money Maker (3.19kg, -0.15kg and 28.07%), EC 914090 x Money Maker (3.18kg, 0.31kg and27.81%), EC 620441 x AVTO 1314 (3.15kg, 0.40kg and 26.47%) and Pusa Ruby x AVTO 1219 (3.14kg, 0.31kg and25.94%) were the most promising hybrids for yield and yield related traits exploitation. These hybrids may be further tested over locations, seasons and years then recommended for commercial cultivation. Two hybrids i.e., EC 620441 x AVTO 1314 and Pusa Ruby x AVTO 1314 were showed high yield per plant coupled with yellow leaf curl virus resistant may be used for cultivation in ToLCV problematic areas.
Research Problem: STUDIES ON HETEROSIS, COMBINING ABILITY FOR YIELD AND YIELD CONTRIBUTING TRAITS AND SCREENING FOR YELLOW LEAF CURL VIRUS RESISTANCE IN TOMATO (Solanum lycopersicum L.)
These Type: M.Sc
Issue Date: 2019-07-19
Appears in Collections:Thesis

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