GENETIC DIVERSITY AND STUDIES ON NUTRACEUTICAL IMPORTANCE IN WHITE AND BROWN FINGER MILLET (Eleusine coracana (L.))

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dc.contributor.advisorHARITHA, T.
dc.contributor.authorGOPAL, MEERA
dc.date.accessioned2022-08-17T09:15:24Z
dc.date.available2022-08-17T09:15:24Z
dc.date.issued2022-08-17
dc.descriptionGENETIC DIVERSITY AND STUDIES ON NUTRACEUTICAL IMPORTANCE IN WHITE AND BROWN FINGER MILLET (Eleusine coracana (L.))en_US
dc.description.abstractThe present investigation entitled “Genetic diversity and studies on nutraceutical importance in white and brown finger millet (Eleusine coracana (L.))” was conducted during Kharif, 2020 at Agricultural College Farm, Bapatla, Andhra Pradesh. Morphological characterization and genetic divergence studies were undertaken with 64 genotypes of finger millet including three checks using square lattice design with two replications. Morphological characterization revealed the existence of sufficient variability for the characters studied. Majority of genotypes exhibited erect growth habit, absence of plant pigmentation, presence of culm branching, semicompact earhead shape, absence of finger branching, absence of multiple whorl, absence of spikelet discontinuity, dark green glume colour and light brown colour seeds. Analysis of variance revealed the existence of significant difference among the genotypes for all traits studied. Based on per se performance, the brown seeded genotypes, namely, IC0477628, IC0477211-X, IC0477272, IC0477680 and white seeded genotypes, namely, VR1034 and VR1029 were observed to be superior for yield and yield contributing characters. Moderate to high variability and high heritability accompanied with high genetic advance as per cent of mean was observed for days to 50% flowering, plant height, flag leaf blade length, flag leaf blade width, productive tillers per plant, fingers per earhead, finger length, finger width, earhead length, peduncle length, test weight, harvest index, grain yield per plant, seed protein content, seed calcium content, seed phosphorus content, seed iron content, seed zinc content, seed copper content, seed manganese content, tannin content and antioxidant activity indicating the predominance of additive gene action and effectiveness of direct phenotypic selection for improvement of the traits. The character association studies revealed grain yield per plant to be significantly and positively correlated with plant height, flag leaf blade length, productive tillers per plant, fingers per earhead, finger length, finger width, earhead length, harvest index and test weight, indicating scope for simultaneous improvement of the traits and grain yield per plant. xiv Path analysis revealed significant positive associations and positive direct effects for productive tillers per plant, fingers per earhead, finger length, finger width, earhead length, harvest index and test weight indicating the importance of these traits as effective selection criteria for yield improvement. The residual effect for path analysis was 0.277 and 0.211 at phenotypic and genotypic levels respectively, indicating that the characters included in the present study explained 73 and 79 percent of variability at phenotypic and genotypic levels respectively on the dependent variable, namely grain yield. In D2 analysis, based on intra and inter cluster distance, maximum inter cluster distance was observed between cluster Ⅳ, with white seeded genotype and cluster Ⅵ which consisted of brown seeded genotype indicating wide difference in performance of white and brown seeded genotypes especially in terms of nutritional and quality aspects and hybridization between genotypes from cluster Ⅳ and Ⅵ is suggested to obtain transgressive segregants Principal component analysis identified the maximum contributing variables i.e., grain yield per plant, harvest index, fingers per earhead, test weight, peduncle length, seed protein content and seed calcium content in first principal component. PCA scores of 64 genotypes (including three checks) were plotted in graph to get 2D and 3D scatter diagrams and from the diagram it was observed that genotypes IC0477628, IC0476988, IC0477206, VR1034, IC473950 and IC0477272 are diverse for yield and quality traits and hence hybridization between these genotypes is suggested for generating transgressive segregants. In Ward’s method, it was observed that maximum inter cluster distance was between cluster III, which consisted of brown seeded genotype and Ⅶ, which consisted of white seeded genotype. In both D2 analysis and Ward’s method separate cluster formation was observed between white seeded and brown seeded genotypes. Highest inter cluster distance was observed between cluster of white seeded genotypes and cluster of brown seeded genotypes. In the present investigation, by considering per se performance and all the three divergence methods brown seeded genotypes such as IC0477628, IC0477211-X, IC0477272, IC0477680 and white seeded genotypes such as VR1034 and VR1029 are identified for yield improvement programmes. Further white seeded genotypes such as VR1016, VR1023, VR939, VR942, IC474231, IC473948 and VR950 are recommended in breeding programmes for biofortification as they recorded superiority for all nutritional traits studied compared to the brown seeded genotypes. Brown seeded genotypes such as IC0477680, IC0477628, IC0476988, IC0477014, IC0477211-X recorded high tannin and antioxidant activity on par with check variety Sri Chaitanya and hence can be used to develop varieties with potential health benefits. Crossing between brown seeded genotypes, IC0477628, IC0477272, IC0477680, IC0477211-X, IC0476988, IC0477014 and white seeded genotypes, VR1034, VR1029, VR1016, VR1023, VR939, VR942, IC474231, IC473948 and VR950 is recommended for obtaining transgressive segregants for yield and quality traits. It was observed that simultaneous selection for yield and quality traits may not be possible and balanced selection criteria should be followed depending on the objective.en_US
dc.identifier.otherD6263
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810186399
dc.keywordsGENETIC DIVERSITY, NUTRACEUTICAL IMPORTANCE, WHITE , BROWN FINGER MILLET (Eleusine coracana (L.))en_US
dc.language.isoEnglishen_US
dc.pages272en_US
dc.publishergunturen_US
dc.subGenetics and Plant Breedingen_US
dc.themeGENETIC DIVERSITY AND STUDIES ON NUTRACEUTICAL IMPORTANCE IN WHITE AND BROWN FINGER MILLET (Eleusine coracana (L.))en_US
dc.these.typeM.Scen_US
dc.titleGENETIC DIVERSITY AND STUDIES ON NUTRACEUTICAL IMPORTANCE IN WHITE AND BROWN FINGER MILLET (Eleusine coracana (L.))en_US
dc.typeThesisen_US
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