Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810129643
Authors: THOTA PRIYANKA
Advisor: Dr. P. SAIDAIAH
Title: STUDY OF HEAT TOLERANCE FOR YIELD AND YIELD ATTRIBUTES AND SSR BASED GENOTYPING 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: 397
Agrotags: null
Keywords: HEAT TOLERANCE FOR YIELD AND YIELD ATTRIBUTES AND SSR BASED GENOTYPING
Abstract: The present investigation entitled Study of heat tolerance for yield and yield attributes and SSR based genotyping in tomato(Solanum lycopersicum L.)” was undertaken to estimate the mean, genetic divergence, genetic variability, correlation and path analysis for yield and yield components and heat tolerance traits along with study of molecular diversity with the help of molecular markers.Twenty three genotypes were sown in a Randomized Block Design with three replications to evaluate genetic divergence and these genotypes were evaluated during Summer, 2018 and Kharif, 2018-19 at College of Horticulture, Rajendranagar, Hyderabad. The analysis of variance (ANOVA) of RBD revealed highly significant differences among the genotypes for all the twenty four characters studied. Wide range of variability was observed for fruit yield per plant (975868.96) followed by number of fruits per plant (27966.17) and plant height (4761.05) showing the scope for selection of initial breeding material for further improvement. The result of mean performance of twenty three genotypes for twenty four characters revealed that the AVTO 1002 was the superior for yield and yield contributing characters i.e. fruit yield per plant (1.96 kg).The genotype AVTO 9803 was found to be early as observed from the character days to first flowering (27.63) and days to 50 per cent flowering (35.70) and it has low percentage of stigma exertion (14.00%) and pollen sterility (19.45%). It was found to be superior for traits like number of flowers per cluster (6.5), lycopene content (7.08mg/100g) and membrane stability (78.71%). The genotype EC 520078 was superior for plant height (181.23 cm), days to last harvest (126.03), number of fruits per plant (280.83) and TSS (6.79 0Brix) and was earlier for days to first harvest (63.76). AVTO 1004 was superior for root length (34.91 cm). Number of primary branches (7.06) and average fruit weight (80.57) was high in AVTO 0101. Relative water content (87.89) and number of flowers per cluster (3.30) were high in Heinz. Fruit length was maximum in AVTO 1007 (6.10cm). AVTO 1314 had highest number of locules (4.55) and stomatal diffusive resistane (9.33sec/cm).Fruit width (6.23cm) was maximum in EC 620427.ascorbic acid (40.11mg/100g) was high in the genotype EC 164863 and check variety PKM 1 recorded high chlorophyll content (1.93g/100g). Mahalanobis D2 statistical analysis revealed that plant height contributed maximum towards divergence followed by average fruit weight, lycopene, fruit width, fruit length, chlorophyll content, plant height, TSS, fruit yield per plant and days to first flowering. The D2 analysis for twenty three genotypes exhibited nine clusters. The inter cluster D2 values of the nine clusters revealed that highest inter cluster generalized distance was between cluster IX and II, while the lowest was between cluster II and cluster I. The clusters indicating high genetic divergence could be effectively utilized in heterosis breeding programme. High heritability coupled with high genetic advance as per cent of mean indicates operation of additive gene action which was observed in characters plant height, number of fruits per plant, average fruit weight, fruit yield per plant. In the present study, high PCV and GCV estimates were recorded for plant height, number of flowers per cluster, pollen sterility, number of fruits per plant, fruit length, fruit width, average fruit weight, fruit yield per plant, number of locules per fruit and TSS indicating the existence of wider genetic variability for these genotypes. From correlation studies, fruit yield per plant exhibited high significant positive association with number of primary branches per plant, fruit length, fruit width, average fruit weight andlycopene content indicating the importance of these traits in selection for yield. Direct selection based on these traits would result in simultaneous improvement of afore said traits and yield per se in cherry tomato. The path coefficient analysis in the study revealed the improvement of yield by improving the characters i.e. fruits per plant and average fruit weight. From molecular diversity studies, out of 100 markers, 42 markers were highly polymorphic with a total of 169 alleles. PIC value ranged from 0.043 (TES 1966) to 0.79 (SSR 276, SSR 0.5) with an average of 0.59. PIC values aabove 0.5 are highly informative. Markers with PIC value above 0.5 can be used in further studies. Cluster analysis revealed that Heinz, EC 520078, AVTO 1004 were highly divergent which was similar to phenotypic divergence. Genotypes AVTO 1219 and AVTO 1314 were found to be similar The results indicated that there was significant variation among genotypes. QTL for heat tolerance were reported in 6 and 12 chromosomes earlier and accordingly the markers from 6th and 12th chromosome reported high polymorphism indicating the presence of heat tolerance in these genotypes. Considering the mean performance, superior genotypes for fruit yield under stress conditions viz., AVTO 1002 (1.96kg), Money maker (1.94 kg), EC 520078 (1.85 kg), AVTO 9803 (1.65 kg) may be released as heat tolerant varieties after proper testing.. For heat tolerant traits viz., AVTO 9802 for stomatal diffusive resistance (9.08sec/cm) and AVTO 9803 for relative water content (82.38%) and membrane stability (78.71 %) can be used for selection in breeding programmes. These varieties may be released after testing their stability over location, seasons and years for commercial cultivation.
Description: The present investigation entitled Study of heat tolerance for yield and yield attributes and SSR based genotyping in tomato(Solanum lycopersicum L.)” was undertaken to estimate the mean, genetic divergence, genetic variability, correlation and path analysis for yield and yield components and heat tolerance traits along with study of molecular diversity with the help of molecular markers.Twenty three genotypes were sown in a Randomized Block Design with three replications to evaluate genetic divergence and these genotypes were evaluated during Summer, 2018 and Kharif, 2018-19 at College of Horticulture, Rajendranagar, Hyderabad. The analysis of variance (ANOVA) of RBD revealed highly significant differences among the genotypes for all the twenty four characters studied. Wide range of variability was observed for fruit yield per plant (975868.96) followed by number of fruits per plant (27966.17) and plant height (4761.05) showing the scope for selection of initial breeding material for further improvement. The result of mean performance of twenty three genotypes for twenty four characters revealed that the AVTO 1002 was the superior for yield and yield contributing characters i.e. fruit yield per plant (1.96 kg).The genotype AVTO 9803 was found to be early as observed from the character days to first flowering (27.63) and days to 50 per cent flowering (35.70) and it has low percentage of stigma exertion (14.00%) and pollen sterility (19.45%). It was found to be superior for traits like number of flowers per cluster (6.5), lycopene content (7.08mg/100g) and membrane stability (78.71%). The genotype EC 520078 was superior for plant height (181.23 cm), days to last harvest (126.03), number of fruits per plant (280.83) and TSS (6.79 0Brix) and was earlier for days to first harvest (63.76). AVTO 1004 was superior for root length (34.91 cm). Number of primary branches (7.06) and average fruit weight (80.57) was high in AVTO 0101. Relative water content (87.89) and number of flowers per cluster (3.30) were high in Heinz. Fruit length was maximum in AVTO 1007 (6.10cm). AVTO 1314 had highest number of locules (4.55) and stomatal diffusive resistane (9.33sec/cm).Fruit width (6.23cm) was maximum in EC 620427.ascorbic acid (40.11mg/100g) was high in the genotype EC 164863 and check variety PKM 1 recorded high chlorophyll content (1.93g/100g). Mahalanobis D2 statistical analysis revealed that plant height contributed maximum towards divergence followed by average fruit weight, lycopene, fruit width, fruit length, chlorophyll content, plant height, TSS, fruit yield per plant and days to first flowering. The D2 analysis for twenty three genotypes exhibited nine clusters. The inter cluster D2 values of the nine clusters revealed that highest inter cluster generalized distance was between cluster IX and II, while the lowest was between cluster II and cluster I. The clusters indicating high genetic divergence could be effectively utilized in heterosis breeding programme. High heritability coupled with high genetic advance as per cent of mean indicates operation of additive gene action which was observed in characters plant height, number of fruits per plant, average fruit weight, fruit yield per plant. In the present study, high PCV and GCV estimates were recorded for plant height, number of flowers per cluster, pollen sterility, number of fruits per plant, fruit length, fruit width, average fruit weight, fruit yield per plant, number of locules per fruit and TSS indicating the existence of wider genetic variability for these genotypes. From correlation studies, fruit yield per plant exhibited high significant positive association with number of primary branches per plant, fruit length, fruit width, average fruit weight andlycopene content indicating the importance of these traits in selection for yield. Direct selection based on these traits would result in simultaneous improvement of afore said traits and yield per se in cherry tomato. The path coefficient analysis in the study revealed the improvement of yield by improving the characters i.e. fruits per plant and average fruit weight. From molecular diversity studies, out of 100 markers, 42 markers were highly polymorphic with a total of 169 alleles. PIC value ranged from 0.043 (TES 1966) to 0.79 (SSR 276, SSR 0.5) with an average of 0.59. PIC values aabove 0.5 are highly informative. Markers with PIC value above 0.5 can be used in further studies. Cluster analysis revealed that Heinz, EC 520078, AVTO 1004 were highly divergent which was similar to phenotypic divergence. Genotypes AVTO 1219 and AVTO 1314 were found to be similar The results indicated that there was significant variation among genotypes. QTL for heat tolerance were reported in 6 and 12 chromosomes earlier and accordingly the markers from 6th and 12th chromosome reported high polymorphism indicating the presence of heat tolerance in these genotypes. Considering the mean performance, superior genotypes for fruit yield under stress conditions viz., AVTO 1002 (1.96kg), Money maker (1.94 kg), EC 520078 (1.85 kg), AVTO 9803 (1.65 kg) may be released as heat tolerant varieties after proper testing.. For heat tolerant traits viz., AVTO 9802 for stomatal diffusive resistance (9.08sec/cm) and AVTO 9803 for relative water content (82.38%) and membrane stability (78.71 %) can be used for selection in breeding programmes. These varieties may be released after testing their stability over location, seasons and years for commercial cultivation. Chapter -
Subject: Vegetable Science
Theme: The present investigation entitled Study of heat tolerance for yield and yield attributes and SSR based genotyping in tomato(Solanum lycopersicum L.)” was undertaken to estimate the mean, genetic divergence, genetic variability, correlation and path analysis for yield and yield components and heat tolerance traits along with study of molecular diversity with the help of molecular markers.Twenty three genotypes were sown in a Randomized Block Design with three replications to evaluate genetic divergence and these genotypes were evaluated during Summer, 2018 and Kharif, 2018-19 at College of Horticulture, Rajendranagar, Hyderabad. The analysis of variance (ANOVA) of RBD revealed highly significant differences among the genotypes for all the twenty four characters studied. Wide range of variability was observed for fruit yield per plant (975868.96) followed by number of fruits per plant (27966.17) and plant height (4761.05) showing the scope for selection of initial breeding material for further improvement. The result of mean performance of twenty three genotypes for twenty four characters revealed that the AVTO 1002 was the superior for yield and yield contributing characters i.e. fruit yield per plant (1.96 kg).The genotype AVTO 9803 was found to be early as observed from the character days to first flowering (27.63) and days to 50 per cent flowering (35.70) and it has low percentage of stigma exertion (14.00%) and pollen sterility (19.45%). It was found to be superior for traits like number of flowers per cluster (6.5), lycopene content (7.08mg/100g) and membrane stability (78.71%). The genotype EC 520078 was superior for plant height (181.23 cm), days to last harvest (126.03), number of fruits per plant (280.83) and TSS (6.79 0Brix) and was earlier for days to first harvest (63.76). AVTO 1004 was superior for root length (34.91 cm). Number of primary branches (7.06) and average fruit weight (80.57) was high in AVTO 0101. Relative water content (87.89) and number of flowers per cluster (3.30) were high in Heinz. Fruit length was maximum in AVTO 1007 (6.10cm). AVTO 1314 had highest number of locules (4.55) and stomatal diffusive resistane (9.33sec/cm).Fruit width (6.23cm) was maximum in EC 620427.ascorbic acid (40.11mg/100g) was high in the genotype EC 164863 and check variety PKM 1 recorded high chlorophyll content (1.93g/100g). Mahalanobis D2 statistical analysis revealed that plant height contributed maximum towards divergence followed by average fruit weight, lycopene, fruit width, fruit length, chlorophyll content, plant height, TSS, fruit yield per plant and days to first flowering. The D2 analysis for twenty three genotypes exhibited nine clusters. The inter cluster D2 values of the nine clusters revealed that highest inter cluster generalized distance was between cluster IX and II, while the lowest was between cluster II and cluster I. The clusters indicating high genetic divergence could be effectively utilized in heterosis breeding programme. High heritability coupled with high genetic advance as per cent of mean indicates operation of additive gene action which was observed in characters plant height, number of fruits per plant, average fruit weight, fruit yield per plant. In the present study, high PCV and GCV estimates were recorded for plant height, number of flowers per cluster, pollen sterility, number of fruits per plant, fruit length, fruit width, average fruit weight, fruit yield per plant, number of locules per fruit and TSS indicating the existence of wider genetic variability for these genotypes. From correlation studies, fruit yield per plant exhibited high significant positive association with number of primary branches per plant, fruit length, fruit width, average fruit weight andlycopene content indicating the importance of these traits in selection for yield. Direct selection based on these traits would result in simultaneous improvement of afore said traits and yield per se in cherry tomato. The path coefficient analysis in the study revealed the improvement of yield by improving the characters i.e. fruits per plant and average fruit weight. From molecular diversity studies, out of 100 markers, 42 markers were highly polymorphic with a total of 169 alleles. PIC value ranged from 0.043 (TES 1966) to 0.79 (SSR 276, SSR 0.5) with an average of 0.59. PIC values aabove 0.5 are highly informative. Markers with PIC value above 0.5 can be used in further studies. Cluster analysis revealed that Heinz, EC 520078, AVTO 1004 were highly divergent which was similar to phenotypic divergence. Genotypes AVTO 1219 and AVTO 1314 were found to be similar The results indicated that there was significant variation among genotypes. QTL for heat tolerance were reported in 6 and 12 chromosomes earlier and accordingly the markers from 6th and 12th chromosome reported high polymorphism indicating the presence of heat tolerance in these genotypes. Considering the mean performance, superior genotypes for fruit yield under stress conditions viz., AVTO 1002 (1.96kg), Money maker (1.94 kg), EC 520078 (1.85 kg), AVTO 9803 (1.65 kg) may be released as heat tolerant varieties after proper testing.. For heat tolerant traits viz., AVTO 9802 for stomatal diffusive resistance (9.08sec/cm) and AVTO 9803 for relative water content (82.38%) and membrane stability (78.71 %) can be used for selection in breeding programmes. These varieties may be released after testing their stability over location, seasons and years for commercial cultivation. Chapter -
Research Problem: STUDY OF HEAT TOLERANCE FOR YIELD AND YIELD ATTRIBUTES AND SSR BASED GENOTYPING IN TOMATO (Solanum lycopersicum L.)
These Type: M.Sc
Issue Date: 2019-07-17
Appears in Collections:Thesis

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