Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810054547
Authors: RAJESH T. M.
Advisor: Dr. P. V. KENCHANAGOUDAR
Title: GENETIC VARIABILITY FOR Sclerotium rolfsii RESISTANCE IN INTERSPECIFIC DERIVATIVES OF GROUNDNUT (Arachis hypogaea L.)
Publisher: University of Agricultural Sciences Dharwad
Language: en
Type: Thesis
Pages: 200
Agrotags: null
Keywords: GENETIC VARIABILITY FOR Sclerotium rolfsii RESISTANCE IN INTERSPECIFIC DERIVATIVES OF GROUNDNUT (Arachis hypogaea L.)
Abstract: The present investigation was carried out to assess the genetic variability present in the interspecific derivative germplasm for resistance to Sclerotium rolfsii and yield component traits and finally to screen agronomically best performing resistant lines under the field and artificial epiphytotic conditions. The experimental material for the present study consisted of 2 populations of interspecific derivatives in BC2F2 generation, which were advanced to BC2F3 and BC2F4 generations. The first population consisted of 96 interspecific genotypes and the second population consisted of 84 genotypes. TMV-2, JL-24, GPBD-4, R-9227, CS-19, TAG-24 were the six checks involved in the study. High genetic variability, high heritability and high GAM was observed for major yield component characters and disease incidence at harvest was observed in both the populations. In the correlation studies, per cent disease incidence at harvest was having strong significant negative association with dry pod yield per plant. The path coefficient studies revealed that in both the populations the major yield contributing characters were having positive direct effect on dry pod yield per plant and the trait per cent of disease incidence at harvest had negative direct effect on dry pod yield per plant at phenotypic and genotypic level. The lines viz., AGL-108, AGL-168, AGL-289 and AGL-635 of population-1 and AGL-2238 and AGL-2383 of Population-2 which are found superior for all major yield contributing characters over all six checks and resistant to disease in both seasons. In molecular diversity study the primer OPK-14 showed highest PIC value of 0.890. On an average 7.06 alleles per marker was amplified. Maximum diversity observed between AGL-163 and AGL-108. The line AGL-163 showed highest genetic diversity among all the lines.
Subject: Genetics and Plant Breeding
Theme: GENETIC VARIABILITY FOR Sclerotium rolfsii RESISTANCE IN INTERSPECIFIC DERIVATIVES OF GROUNDNUT (Arachis hypogaea L.)
These Type: M.Sc
Issue Date: 2015-03
Appears in Collections:Thesis

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