Genetic improvement for oil quality through induced mutagenesis in groundnut (Arachis hypogaea L.)
KrishiKosh
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Title |
Genetic improvement for oil quality through induced mutagenesis in groundnut (Arachis hypogaea L.)
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Creator |
Kavera
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Contributor |
H.L.Nadaf
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Subject |
Genetic Plant Breeding
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Description |
Oils having high oleic acid and reduced linoleic acid are the most stable and desirable from nutritional point of view. The present investigation was aimed towards oil quality improvement in two cultivars (GPBD-4 and TPG-41) of groundnut (Arachis hypogaea L.) through induced mutagenesis using chemical (EMS- 0.5%) and physical mutagens, gamma rays (200 and 300 Gy) and was undertaken from 2004 to 2007 at Seed Unit, UAS, Dharwad. Mutagen treatment with EMS (0.5%) in GPBD-4 and gamma rays at 300 Gy in TPG- 41 were found to be effective in increasing the variability for fatty acid content. Greater magnitude of induced variability was found for oleic acid (37.40%-75.16%), linoleic acid (9.01-40.30%) and O/L ratio (0.95-8.34). Mutant, GE-113 (74.48%, 9.17% and 8.12) recorded significant increase in oleic acid, reduced linoleic acid and highly increased O/L ratio compared to control GPBD-4 (50.87%, 29% and 1.76) and far exceeded the O/L ratio reported (3.23) from both national and world germplasm collections. The correlation studies indicated that there existed highly significant negative correlation between oleic acid and palmitc acid, linoleic acid and iodine value and no undesirable association of these with the agronomic traits of economic importance. Mutant GE-273 characterized by low O/L ratio (1.16) compared to control (1.76) produced a very distinct band profile for most of the RAPD primers screened indicating larger extent of alteration in its DNA sequence. The superior mutants for O/L ratio (94 and 44), pod yield (8 and 11), oil content (10 and 25), protein content (50 and 42), 100-seed weight (45 and 62) from mutant populations of GPBD-4 and TPG-41 respectively were isolated which recorded significant increase compared to their respective parents. Superior mutants with combined features of productivity, oil quality and resistance to foliar diseases have been identified that would revolutionize oil industry and health status of economically poor sections of Indian and global population. |
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Date |
2016-07-22T16:07:43Z
2016-07-22T16:07:43Z 2008 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/69434
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Format |
application/pdf
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Publisher |
UAS Dharwad
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