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  • Title: Homoeologous set of NBS-LRR genes located at leaf and stripe rust resistance loci on short arms of chromosome 1 of wheat.
    Author: Spielmeyer W, Lagudah S.
    Journal: Funct Integr Genomics; 2003 Mar; 3(1-2):86-90. PubMed ID: 12590346.
    Abstract:
    Homoeologous group 1 chromosomes of wheat contain important genes that confer resistance to leaf, stem and stripe rusts, powdery mildew and Russian wheat aphid. A disease resistance gene analog encoding nucleotide binding site-leucine rich repeat (NBS-LRR), designated RgaYr10, was previously identified at the stripe rust resistant locus, Yr10, located on chromosome 1BS distal to the storage protein, Gli-B1locus. RgaYr10 identified gene members in the homoeologous region of chromosome 1DS cosegregating with the leaf rust resistance gene, Lr21, which originally was transferred from a diploid D genome progenitor. Four RgaYr10 gene members were isolated from chromosome 1DS and compared to two gene members previously isolated from the chromosome 1BS homeologue. NBS-LRR genes tightly linked to stripe rust resistance gene Yr10 on chromosome 1BS were closely related in sequence and structure to NBS-LRR genes tightly linked to leaf rust resistance gene Lr21 located within the homoeologous region on chromosome 1DS. The level of sequence homology was similar between NBS-LRR genes that were isolated from different genomes as compared to genes from the same genome.
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