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Abstract Detail

Genomics / Proteomics

Nepal, Madhav P. [1], Shaw, Samantha R. [2], Andersen, Ethan [2].

Tracking Disease Resistance in Wheat through Identification of R-gene Orthologs in Aegilops tauschii Coss. (Poaceae).

Identification of resistance genes (R-genes) and understanding their functions are critical for preventing crop loss due to pathogen infection. Aegilops tauschii, the contributor of the wheat D genome, could give insight into the evolution of wheat resistance genes. Our objectives were to identify CNL (Coiled-coil, Nucleotide-binding site, and Leucine-rich region) R-genes within the Aegilops tauschii genome and elucidate evolutionary relationships with other closely related grass species. We searched the Aegilops tauschii genome for highly conserved motifs that are indicative of CNL R-genes: P-Loop, Kinase II, and GLPL motifs within the NB-Arc. We identified 402 CNL R-genes in Aegilops, which were nested into the clades as in Arabidopsis but with a great expansion of CNL-C, a great reduction of the CNL-A, and complete absence of the CNL-D gene members. Further evolutionary analysis is underway, and the results will be presented in our presentation. Identification of Aegilops R-gene would help us understand the evolution of R-genes located in D-genome of wheat and has a potential implication in creating a durable R-gene in future.

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Related Links:
Nepal Lab

1 - South Dakota State University, Biology And Microbiology, Northern Plain Biostress Laboratory, Brookings, SD, 57007, USA
2 - South Dakota State University, Department of Biology/Microbiology, Brookings, SD, 57007, United States

Disease Resistance Genes
CNL Genes
Wheat D genome
gene duplication.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PGP008
Abstract ID:942
Candidate for Awards:None

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