000			02580nam a22003137a 4500
001			G98725
003			MX-TxCIM
005			20190829175118.0
008			121211s ||||f| 0 p|p||0|| |
040			_aMX-TxCIM
090			_aCIS-7480
100	1		_aCase, A.J. _uPlant and Animal Genome (PAG) XXII; The Largest Ag-Genomics Meeting in the World; San Diego, CA (USA); 11-15 Jan 2014
245	0	0	_aAssociation mapping of stem rust resistance in barley
260			_c2014
300			_a1 page
500			_aAbstract only
520			_aStem rust (Puccinia graminis f. sp. tritici) is an important disease of both wheat and barley. Highly virulent stem rust races like TTKSK (aka isolate Ug99) are virulent on greater than 90% of the world?s wheat and barley cultivars. The objective of this research was to identify barley accessions carrying novel resistance to races in the Ug99 lineage and utilize associating mapping to identify the underlying genetic component. The USDA National Small Grains Collection (NSGC) barley core collection consisting of 2,563 accessions was evaluated and a curated subset (NSGC iCore) was used in the analysis. Accessions were screened against race TTKSK at the adult stage in Njoro, Kenya and at the seedling stage in the Biosafety Level-3 containment facility in St. Paul, Minnesota. Accessions were also screened against race QCCJB at the adult stage in St. Paul, Minnesota. The collection was split in half for testing in Njoro, Kenya: in 2012, 27% (291 accessions) had intermediate to high levels of resistance and in 2013 approximately 15% (177 accessions) displayed resistance to TTKSK at the adult plant stage. Seedling evaluations to race indicated that resistance is present in the collection with a frequency of 7% (197 accessions). At St. Paul, 6% (167 accessions) showed intermediate to high levels of resistance to race QCCJB at the adult plant stage. Association mapping detected significant loci for all traits evaluated. Loci associated with adult plant reaction to QCCJB on chromosome 5H are likely due to the rpg4/Rpg5 complex. Loci on other chromosomes for other traits were not located near genes of known function and warrant further investigation.
536			_aGlobal Wheat Program
546			_aEnglish
593			_aLucia Segura
594			_aINT2843
595			_aCSC
700	1		_aMuñoz-Amatriain, M., _ecoaut.
700	1		_aNjau, P., _ecoaut.
700	1		_aSteffenson, B.J., _ecoaut.
700	1		_92088 _aWanyera, R.
700	1		_9867 _aBhavani, S. _gGlobal Wheat Program _8INT2843
942			_cPRO
999			_c8768 _d8768