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Marker assisted introgression of genes for multiple rust resistance in wheat variety HD2932

KrishiKosh

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Title Marker assisted introgression of genes for multiple rust resistance in wheat variety HD2932
Ph.D.
 
Creator NIHARIKA MALLICK
 
Contributor Vinod
 
Subject Marker assisted foreground and background selection, Near isogenic lines (NILs), wheat, rust resistance genes, Lr19, Sr26, Yr10, genome recovery, leaf rust, stem rust and yellow rust
 
Description T-8773
Using a widely grown and adapted wheat variety HD2932 as recurrent parent three
near isogenic lines (NILs) carrying leaf rust resistance gene, Lr19, stem rust resistance
gene, Sr26 and yellow rust resistance geneYr10 were developed just in a period of two
and half years by raising two crops per year (main crop at IARI New Delhi and off
season nursery at IARI regional station, Wellington, TN) with the help of marker
assisted foreground and background selection. The results of background analysis
indicated high genomic similarity of NILs with their recurrent parent which varied
from 94.38 to 98.46%. The resistance to leaf rust, stem rust and yellow rust were
stably expressed by the respective NILs as seedlings of each generation starting from
F1 were tested using molecular markers linked to the resistance genes Lr19, Sr26 and
Yr10. All the NILs were found to carry the targeted genes in the homozygous state in
BC2F2 generations. The yield traits need to be recorded in BC2F3 generation before
releasing as new varieties/essentially derived varieties. The potential applications of
these NILs in gene introgression are discussed.
 
Date 2016-08-22T14:36:14Z
2016-08-22T14:36:14Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/73312
 
Format application/pdf
 
Publisher IARI, DIVISION OF GENETICS,NEW DELHI