Identification of resistance gene analogues (RGA) and development of E chromosome-specific RGA markers in wheat–Lophopyrum elongatum addition lines
Guo-Yue Chen A , Yu-Ming Wei A B , Ya-Xi Liu A , Li Wei C , Ji-Rui Wang A and You-Liang Zheng A B D
+ Author Affiliations
- Author Affiliations
A Triticeae Research Institute, Sichuan Agricultural University, Yaan, Sichuan 625014, China.
B Key Laboratory of Crop Genetic Resources and Improvement in Southwest China, Ministry of Education, Sichuan Agricultural University, Yaan, Sichuan 625014, China.
C College of Agronomy, Sichuan Agricultural University, Yaan, 625014 Sichuan, China.
D Corresponding author. Email: ylzheng@sicau.edu.cn
Crop and Pasture Science 61(11) 929-937 https://doi.org/10.1071/CP10216
Submitted: 22 June 2010 Accepted: 15 September 2010 Published: 4 November 2010
Abstract
Degenerate primers designed from the conserved regions of nucleotide-binding site domains of known plant resistance gene products were used to scan a complete set of wheat–Lophopyrum elongatum addition lines. Forty-six clones were isolated and they were grouped into seven families of resistance gene analogues (RGA). All families were characterised as the Toll–Interleukin receptor group of R-genes (plant disease resistance genes). The putative chromosome-specific SNP (single-nucleotide polymorphism) loci were identified by multiple sequence alignments. Furthermore, 20 E chromosome-specific RGA markers were used to identify polymorphic fragments in wheat–Lo. elongatum addition lines and amphidiploid. The results suggested that these chromosome-specific markers could be not only useful for marker-assisted selection and map-based cloning of R-genes in Lo. elongatum, but also feasible for investigating the evaluation process of the E genome.
Additional keywords: genetic markers, Lophopyrum elongatum, resistance gene analogues (RGA).
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