Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810058562
Authors: BASAVARAJA SINDHIGERI
Advisor: Dr. V. RUDRA NAIK
Title: INVESTIGATIONS ON INTROGRESSED BACKCROSS SEGREGANTS FOR LEAF RUST RESISTANCE GENES THROUGH MARKER ASSISTED SELECTION IN BREAD WHEAT (Triticum aestivium L.)
Publisher: University of Agricultural Sciences Dharwad
Language: en
Type: Thesis
Pages: 118
Agrotags: null
Keywords: INVESTIGATIONS ON INTROGRESSED BACKCROSS SEGREGANTS FOR LEAF RUST RESISTANCE GENES THROUGH MARKER ASSISTED SELECTION IN BREAD WHEAT (Triticum aestivium L.)
Abstract: The present investigation was carried out to transfer two wheat rust resistance genes in to an elite susceptible bread wheat cultivar DWR 162 a ruling variety of peninsular zone using marker assisted selection. The near isogenic line ‘PBW 343’ having both Lr24 and Lr28 major genes was used as donor for introgression of these two genes into DWR 162. The marker assisted selection was conducted in the back cross generations and also selfed generations using SCAR markers SCS719 and SCS421 linked to Lr24 and Lr28 genes. Evaluation of individual plants carrying leaf rust resistant genes like Lr24, Lr28 as well as both Lr24 and Lr28 in back cross and straight F4 and F5 generations indicated the superior performance of plants with both Lr24 and Lr28 as compared to plants with individual leaf rust resistance genes Lr28 followed by Lr24. The BC2F3 plants had high resemblance with recurrent parent DWR162 followed by F5 and F4 generations. The highest frequency of transgressive segregants recorded in F4 followed by F5 and BC2F3 populations for the traits, viz., number of seeds per spike, number of spikelets per spike, thousand grain weight, and grain yield per plant. Genetic variability studies in BC2F3 population indicated higher PCV and GCV for number of productive tillers per plant, grain yield per plant, and leaf rust resistance. Moderate PCV and GCV was observed for plant height, spike length, number of spikelets per spike and number of seeds per spike. The high heritability and high genetic advance over mean recorded for number of productive tillers per plant, grain yield per plant and coefficient of infection (CI) for leaf rust in F4 and F5 population of cross DWR 162 X NIL PBW 343 indicated high potentiality of these populations along with leaf rust resistance.
Subject: Genetics and Plant Breeding
Theme: INVESTIGATIONS ON INTROGRESSED BACKCROSS SEGREGANTS FOR LEAF RUST RESISTANCE GENES THROUGH MARKER ASSISTED SELECTION IN BREAD WHEAT (Triticum aestivium L.)
These Type: M.Sc
Issue Date: 2015-06
Appears in Collections:Thesis

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