GAMMA IRRADIATED VARIABILITY STUDIES IN BAMBARA GROUNDNUT (Vigna subterranean (L.) Verdc.)

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dc.contributor.advisorNANDINI, R
dc.contributor.authorVIJAYA KUMARA, L
dc.date.accessioned2017-01-04T08:43:42Z
dc.date.available2017-01-04T08:43:42Z
dc.date.issued40600
dc.description.abstractThe present investigation was under taken with the objectives of determining the optimum dose of gamma rays for the variety SB-42, assessing genetic variability in M2 generation and to know the correlation and path coefficient between seed yield and its component characters. For the present study, variety SB-42 of Bambara groundnut was irradiated with the gamma radiation at doses of 150Gy, 175Gy, 200Gy and 225Gy. Germination and survival per cent in M1 generation decreased with the increase in doses of gamma radiation. Lower dose of 150Gy did not affect the germination whereas germination was affected at 225Gy. Optimum dose was found to be 200Gy for survival. In M2 generation, negative shift in mean was observed for all the characters except days to flowering, but shelling percentage and number of pods per plant showed positive shift in mean at 150Gy and 175Gy. Correlation study in M2 generation revealed that different doses of gamma rays are responsible for enhancing, reducing or altering the correlation for the characters and thus provide opportunity to improve yield. Number of branches per plant, pod yield per plant and number of pods per plant showed highly significant correlation with seed yield. From the path coefficient studies it was observed that the characters which showed high positive correlation with yield may not exert direct positive effect on the yield. Pod yield per plant followed by shelling percentage (except at 150Gy) and number of pods per plant (except at 150Gy) exerted maximum direct effect on seed yield per plant. Significant morphological variability was observed following gamma irradiation. One early maturing, four double seeded plants and two high yielding mutants were identified as economic mutants.en_US
dc.identifier.otherTH-9967
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/94284
dc.language.isoenen_US
dc.publisherUniversity of Agricultural Sciences GKVK, Bangaloreen_US
dc.subGenetics and Plant Breedingen_US
dc.these.typeM.Sc
dc.titleGAMMA IRRADIATED VARIABILITY STUDIES IN BAMBARA GROUNDNUT (Vigna subterranean (L.) Verdc.)en_US
dc.typeThesisen_US
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