“IDENTIFICATION OF SELECTION CRITERIA IN F4 AND F5 GENERATIONS IN MUNGBEAN [Vigna radiata (L.) R. Wilczek]” 2448

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dc.contributor.advisorDr. B. A. Monpara
dc.contributor.authorMalakiyaNarseebhaiJerambhai
dc.date.accessioned2017-11-03T05:47:36Z
dc.date.available2017-11-03T05:47:36Z
dc.date.issued2017-10
dc.description.abstractKey words: Genetic variability,heritability, genetic advance, correlation, path analysis, selection indices. The present investigation was carried out in Randomized Block Design with three replications at Instructional Farm, Department of Agronomy, College of Agriculture, JAU, Junagadh during Summer and kharif 2016. A set of 20 F4 and its subsequent F5 populations along with 8 parents of mungbean were utilized to estimate genetic variability, character association, path analysis and selection indices. The segregating F4 generation was obtained from Research Scientist (Chickpea), Pulses Research Station,Junagadh Agricultural University, Junagadh. The observations were recorded on 20 randomly selected plants from each population per replication and their mean values were used separately for statistical analysis. The characters considered under study were days to flowering, days to maturity, plant height, number of branches per plant, number of clusters per plant, number of pods per plant, pod length, number of seeds per pod, seed yield per plant and 100-seed weight. The analysis of variance revealed highly significant difference among the segregating populations for all the ten characters,suggesting sufficient amount of variability among the F4 and its subsequent F5 segregating material. In the present experimental material, wide range of variation was observed for number of branches per plant, number of clusters per plant, seed yield per plant and number of pods per plantin case of F4. While, in case of F5 it was observed for number of branches per plant, seed yield per plant, number of clusters per plant, number of pods per plantand plant height. In F4, the high value of GCV was observed for number of branches per plant and number of clusters per plant. The moderate value for GCV was observed for seed yield per plant, number of pods per plant and number of seeds per pod.While in case of F5, highest value for GCV was observed for number of branches per plant and seed yield per plant. It was observed moderate for number of clusters per plant, plant height and number of pods per plant. In F4, the high heritability (in broad sense) values were observed for days to flowering followed by number of clusters per plant, number of branches per plant, number of seeds per pod and 100-seed weight. While in case of F5, the high values for heritability was recorded for plant height followed by number of branches per plant, number of clusters per plant, number of seeds per pod and seed yield per plant. In F4, the genetic advance at 5% selection (k = 2.06) was found maximum for days to maturity followed by number of branches per plant. The genetic advance expressed as per cent of mean were found high for number of branches per plant, number of clusters per plant and seed yield per plant and. In F5, high genetic advance was recorded for the trait plant height. Genetic advance expressed as per cent of mean was high for number of branches per plant and seed yield per plant. High heritability coupled with high / moderate genetic advance was noted for days to maturity, number of clusters per plant and number of branches per plant in F4’s and plant height and number of branches per plant in F5’s. The values of genotypic correlation coefficient were higher than the phenotypic correlation coefficients. In F4, the character number of clusters per plant, number of pods per plant, pod length and number of seeds per pod had positive and significant correlation with seed yield per plant at phenotypic level. Genotypic correlations between above said traits were also positive and strong. Days to maturity and number of branches per plant also exhibited positive and significant genotypic association with seed yield per plant.Plant height had also recorded positive and significant associationwith number of branches per plant and number of pods per plant at phenotypic and genotypic levels.Number of clusters per plant exhibited positive and significant phenotypic and genotypic association with seed yield per plant. Number of pods per plant and pod length also had positive and significant association with seed yield per plant.In case of F5,the character number of branches per plant, number of clusters per plant, number of pods per plant and number of seeds per pod had positive and significant association with seed yield per plant at phenotypic as well as genotypic level.Number of branches per plant and number of clusters per plant had positive and significant association with number of clusters per plant and number of pods per plant, respectively at both phenotypic and genotypic levels. The number of clusters per plant had also positive and significant correlation with number of pods per plant at the both levels. High to moderate positive direct effects (genotypic and phenotypic) on seed yield per plant was recorded by plant height, number of clusters per plant, pod length and number of seed yield per plant in F4 population. The traits number of clusters per plant, number of pods per plant, pod length and number of seeds per pod was positively and significantly correlation with seed yield per plant at both the levels. In F4segregating populations, the best selection index was observed in five characters viz., seed yield per plant, number of pods per plant, pod length and number of seeds per pod. The next best index was made up by four characters viz., seed yield per plant, number of clusters per plant, number of pods per plant and plant height.While, in F5 segregating populations, the best selection index was observed in five characters viz., seed yield per plant, number of branches per plant, number of clusters per plant, number of pods per plant and number of seeds per pod. The next best index was made up by four characters viz., seed yield per plant, number of branches per plant, number of clusters per plant and number of pods per plant.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810034635
dc.language.isoenen_US
dc.publisherJAU,JUNAGADHen_US
dc.subPlant Breedingen_US
dc.subjectPLANT BREEDINGen_US
dc.theme“IDENTIFICATION OF SELECTION CRITERIA IN F4 AND F5 GENERATIONS IN MUNGBEAN [Vigna radiata (L.) R. Wilczek]” 2448en_US
dc.these.typeM.Scen_US
dc.title“IDENTIFICATION OF SELECTION CRITERIA IN F4 AND F5 GENERATIONS IN MUNGBEAN [Vigna radiata (L.) R. Wilczek]” 2448en_US
dc.typeThesisen_US
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