2013 Annual Report
1)A molecular phylogeny of 733 landraces from the national small grains germplasm collection that had been screened in Kenya for resistance was developed. The purpose of this assay was to identify, based upon geography of origin and molecular profiles, novel UG99 resistance genes that can be introgressed into relevant breeding materials..
2)The above mentioned landraces were screened in Pullman and Mount Vernon, Washington; lines with resistance to all PNW stripe rust races were identified and incorporated into the molecular phylogeny (Sthapit, J Newcomb, M., Bonman, J.M., Chen, X., and See, D. 2012. Genetic Diversity for Stem and Stripe Rust Resistance in Wheat Landraces. Poster No. P0156. Plant and Animal Genome Conf. XX. January 14-18, 2012). Six mapping populations with both stem and stripe rust resistance have been developed using locally adapted germplasm. The parents of the 6 mapping populations have been genotyped; the mapping populations, currently in the F4 generation, have been phenotyped in the field at Whitlow farm in Pullman, 3 populations have adult plant resistance and 3 have seedling resistance. Genotyping of the mapping populations will start fall of 2013..
2)Fifty lines from the 733 landraces were assayed with the new 9,000 single nucleotide polymorphism (SNP) panel and the results of this assay are currently being evaluated in collaboration with scientist at the National Small Grains Germplasm Collection (NSGGC). Immediate impacts from this assay include two mapping populations that are being developed in the genotyping lab. These mapping populations will now include the relevant SNP markers in their genetic maps. Another impact is the association mapping of SNP markers for UG99 resistance. On the subject of stem rust research and discovery of new resistance sources, all results are communicated to the relevant research communities through meetings, frequent emails and conference calls. These include all discussions with principle investigator (PI) leading research and graduate students and post docs involved in the research.