Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810129648
Authors: T. Samatha
Advisor: Dr. P. SAIDAIAH
Title: HETEROSIS AND COMBINING ABILITY STUDIES FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN BRINJAL (Solanum melongena L.)
Publisher: College of Horticulture, Rajendranagar, HYD-30
Citation: Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30
Language: en
Type: Thesis
Pages: 185
Agrotags: null
Keywords: HETEROSIS AND COMBINING ABILITY STUDIES FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN BRINJAL (Solanum melongena L.)
Abstract: The present investigation entitled “Heterosis and combining ability studies for yield and yield contributing characters in brinjal (Solanum melongena L.)” was carried out at PG Students Research Farm, College of Horticulture, Rajendranagar, Hyderabad in order to obtained information on the gene action, nature of combining ability, extent of heterosis and to identify potential parental lines and cross combinations for genetic improvement in brinjal using line x tester analysis. The seven genotypes viz., RCBG-1, RCBG-2, RCBG-3, RCBG-4, RCBG-5, RCBG-6 and RCBG-7 having high genetic divergence and desirable characters were selected as lines and three improved locally popular varieties viz., Bhagyamathi, Gulabi and Shyamala were selected as testers. The crosses were made following line x tester mating design during Rabi, 2016-17. The resultant twenty one single crosses along with ten parents and two standard checks (Arka Anand and Mahy Hari) were evaluated for twenty yield and yield contributing traits during Summer, 2017 in RBD with three replications. The analysis of variance revealed that the replication mean sum of squares due to parents and hybrids were non significant for all the characters studied, which means there is no environmental error in controlling these characters. The treatment mean sum of squares due to parents and hybrids for all the characters under study were highly significant, indicating the existence of considerable variability among the characters studied. Further line x tester effect was found to be significant for all the characters under study except days to last harvest and fruit width indicating that there is good contribution of characters from lines as well as testers. The mean performance of five crosses viz., RCBG-4 x Shyamala (2.73 kg), RCBG-2 x Bhagyamathi (2.66 kg), RCBG-1 x Bhagyamathi (2.63 kg), RCBG-7 x Shyamala (2.43 kg) and RCBG-1 x Shyamala (2.42 kg) were significantly superior than the best commercial check Mahy Hari (1.89 kg) for marketable yield per plant(kg). The ratios of GCA/SCA variances revealed the preponderance of non additive gene action in the inheritance of all the characters studied except days to last harvest. Hence, heterosis breeding is ideal for improving all the characters except days to last harvest, where selections can be done to improve the trait. The gca effects of the parents revealed that the two genotypes viz., RCBG-1 and RCBG-2 among lines and Shyamala and Bhagyamathi among testers were found to be promising general combiners for yield per plant and most of other traits. Hence, these inbreds can be utilized for potential application in crop improvement programmes. Based on the significant sca effects, seven hybrids viz., RCBG-2 x Bhagyamathi, RCBG-1 x Bhagyamathi, RCBG-4 x Shyamala, RCBG-6 x Shyamala, RCBG-3 x Bhagyamathi, RCBG-7 x Gulabi and RCBG-5 x Gulabi were identified as promising for yield per plant and other yield contributing characters. Based on the present study it can be emphasized that three cross combinations viz., RCBG-1 x Bhagyamathi, RCBG-2 x Bhagyamathi and RCBG-4 x Shyamala have been identified as promising based on per se performance, sca effects and heterosis for yield per plant and other important attributes. These hybrids may be subjected to multilocational and multiseasonal trials before release proposals.
Description: The present investigation entitled “Heterosis and combining ability studies for yield and yield contributing characters in brinjal (Solanum melongena L.)” was carried out at PG Students Research Farm, College of Horticulture, Rajendranagar, Hyderabad in order to obtained information on the gene action, nature of combining ability, extent of heterosis and to identify potential parental lines and cross combinations for genetic improvement in brinjal using line x tester analysis. The seven genotypes viz., RCBG-1, RCBG-2, RCBG-3, RCBG-4, RCBG-5, RCBG-6 and RCBG-7 having high genetic divergence and desirable characters were selected as lines and three improved locally popular varieties viz., Bhagyamathi, Gulabi and Shyamala were selected as testers. The crosses were made following line x tester mating design during Rabi, 2016-17. The resultant twenty one single crosses along with ten parents and two standard checks (Arka Anand and Mahy Hari) were evaluated for twenty yield and yield contributing traits during Summer, 2017 in RBD with three replications. The analysis of variance revealed that the replication mean sum of squares due to parents and hybrids were non significant for all the characters studied, which means there is no environmental error in controlling these characters. The treatment mean sum of squares due to parents and hybrids for all the characters under study were highly significant, indicating the existence of considerable variability among the characters studied. Further line x tester effect was found to be significant for all the characters under study except days to last harvest and fruit width indicating that there is good contribution of characters from lines as well as testers. The mean performance of five crosses viz., RCBG-4 x Shyamala (2.73 kg), RCBG-2 x Bhagyamathi (2.66 kg), RCBG-1 x Bhagyamathi (2.63 kg), RCBG-7 x Shyamala (2.43 kg) and RCBG-1 x Shyamala (2.42 kg) were significantly superior than the best commercial check Mahy Hari (1.89 kg) for marketable yield per plant(kg). The ratios of GCA/SCA variances revealed the preponderance of non additive gene action in the inheritance of all the characters studied except days to last harvest. Hence, heterosis breeding is ideal for improving all the characters except days to last harvest, where selections can be done to improve the trait. The gca effects of the parents revealed that the two genotypes viz., RCBG-1 and RCBG-2 among lines and Shyamala and Bhagyamathi among testers were found to be promising general combiners for yield per plant and most of other traits. Hence, these inbreds can be utilized for potential application in crop improvement programmes. Based on the significant sca effects, seven hybrids viz., RCBG-2 x Bhagyamathi, RCBG-1 x Bhagyamathi, RCBG-4 x Shyamala, RCBG-6 x Shyamala, RCBG-3 x Bhagyamathi, RCBG-7 x Gulabi and RCBG-5 x Gulabi were identified as promising for yield per plant and other yield contributing characters. Based on the present study it can be emphasized that three cross combinations viz., RCBG-1 x Bhagyamathi, RCBG-2 x Bhagyamathi and RCBG-4 x Shyamala have been identified as promising based on per se performance, sca effects and heterosis for yield per plant and other important attributes. These hybrids may be subjected to multilocational and multiseasonal trials before release proposals.
Subject: Vegetable Science
Theme: The present investigation entitled “Heterosis and combining ability studies for yield and yield contributing characters in brinjal (Solanum melongena L.)” was carried out at PG Students Research Farm, College of Horticulture, Rajendranagar, Hyderabad in order to obtained information on the gene action, nature of combining ability, extent of heterosis and to identify potential parental lines and cross combinations for genetic improvement in brinjal using line x tester analysis. The seven genotypes viz., RCBG-1, RCBG-2, RCBG-3, RCBG-4, RCBG-5, RCBG-6 and RCBG-7 having high genetic divergence and desirable characters were selected as lines and three improved locally popular varieties viz., Bhagyamathi, Gulabi and Shyamala were selected as testers. The crosses were made following line x tester mating design during Rabi, 2016-17. The resultant twenty one single crosses along with ten parents and two standard checks (Arka Anand and Mahy Hari) were evaluated for twenty yield and yield contributing traits during Summer, 2017 in RBD with three replications. The analysis of variance revealed that the replication mean sum of squares due to parents and hybrids were non significant for all the characters studied, which means there is no environmental error in controlling these characters. The treatment mean sum of squares due to parents and hybrids for all the characters under study were highly significant, indicating the existence of considerable variability among the characters studied. Further line x tester effect was found to be significant for all the characters under study except days to last harvest and fruit width indicating that there is good contribution of characters from lines as well as testers. The mean performance of five crosses viz., RCBG-4 x Shyamala (2.73 kg), RCBG-2 x Bhagyamathi (2.66 kg), RCBG-1 x Bhagyamathi (2.63 kg), RCBG-7 x Shyamala (2.43 kg) and RCBG-1 x Shyamala (2.42 kg) were significantly superior than the best commercial check Mahy Hari (1.89 kg) for marketable yield per plant(kg). The ratios of GCA/SCA variances revealed the preponderance of non additive gene action in the inheritance of all the characters studied except days to last harvest. Hence, heterosis breeding is ideal for improving all the characters except days to last harvest, where selections can be done to improve the trait. The gca effects of the parents revealed that the two genotypes viz., RCBG-1 and RCBG-2 among lines and Shyamala and Bhagyamathi among testers were found to be promising general combiners for yield per plant and most of other traits. Hence, these inbreds can be utilized for potential application in crop improvement programmes. Based on the significant sca effects, seven hybrids viz., RCBG-2 x Bhagyamathi, RCBG-1 x Bhagyamathi, RCBG-4 x Shyamala, RCBG-6 x Shyamala, RCBG-3 x Bhagyamathi, RCBG-7 x Gulabi and RCBG-5 x Gulabi were identified as promising for yield per plant and other yield contributing characters. Based on the present study it can be emphasized that three cross combinations viz., RCBG-1 x Bhagyamathi, RCBG-2 x Bhagyamathi and RCBG-4 x Shyamala have been identified as promising based on per se performance, sca effects and heterosis for yield per plant and other important attributes. These hybrids may be subjected to multilocational and multiseasonal trials before release proposals.
Research Problem: HETEROSIS AND COMBINING ABILITY STUDIES FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN BRINJAL (Solanum melongena L.)
These Type: M.Sc
Issue Date: 2019-07-18
Appears in Collections:Thesis

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