000 03367nab a22004457a 4500
999 _c30043
_d30043
001 G97985
003 MX-TxCIM
005 20240919020947.0
008 121211s2013 gw |||p op||| | e eng d
022 _a1432-2242 (Online)
022 _a0040-5752
024 8 _ahttps://doi.org/10.1007/s00122-013-2050-8
040 _aMX-TxCIM
041 _aeng
090 _aCIS-7178
100 1 _aLetta, T.
_93233
245 1 0 _aSearching for novel sources of field resistance to Ug99 and Ethiopian stem rust races in durum wheat via association mapping
260 _aBerlin (Germany) :
_bSpringer,
_c2013.
500 _aPeer review
500 _aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0040-5752
520 _aPuccinia graminis f. sp. tritici, the causative agent of stem rust in wheat, is a devastating disease of durum wheat. While more than 50 stem rust resistance (Sr) loci have been identified in wheat, only a few of them have remained effective against Ug99 (TTKSK race) and other durum-specific Ethiopian races. An association mapping (AM) approach based on 183 diverse durum wheat accessions was utilized to identify resistance loci for stem rust response in Ethiopia over four field-evaluation seasons and artificial inoculation with Ug99 and a mixture of durum-specific races. The panel was profiled with simple sequence repeat, Diversity Arrays Technology and sequence-tagged site markers (1,253 in total). The resistance turned out to be oligogenic, with twelve QTL-tagging markers that were significant (P < 0.05) across three or four seasons. R 2 values ranged from 1.1 to 11.3 %.Twenty-four additional single-marker/QTL regions were found to be significant over two seasons. The AM results confirmed the role of Sr13, previously described in bi-parental mapping studies, and the role of chromosome regions putatively harbouring Sr9, Sr14, Sr17 and Sr28. Three minor QTLs were coincident with those reported in hexaploid wheat and five overlapped with those recently reported in the Sebatel × Kristal durum mapping population. Thirteen single-marker/QTL regions were located in chromosome regions where no Sr genes/QTLs have been previously reported. The allelic variation identified in this study is readily available and can be exploited for marker-assisted selection, thus providing additional opportunities for a more durable stem rust resistance under field conditions.
536 _aGenetic Resources Program|Global Wheat Program
546 _aText in English
591 _aCIMMYT Informa No. 1846|Springer
594 _aINT2585|CCJL01
595 _aCSC
650 7 _2AGROVOC
_92261
_aMicrosatellites
650 7 _2AGROVOC
_91142
_aHard wheat
650 7 _2AGROVOC
_92020
_aHexaploidy
650 7 _aRusts
_gAGROVOC
_2
_91251
700 1 _aMaccaferri, M.
_92805
700 1 _aBadebo, A.
_8N1706233
_gGlobal Wheat Program
_92740
700 1 _9844
_aAmmar, K.
_gGlobal Wheat Program
_8INT2585
700 1 _93072
_aRicci, A.
700 1 _aCrossa, J.
_gGenetic Resources Program
_8CCJL01
_959
700 1 _92806
_aTuberosa, R.
773 0 _tTheoretical and Applied Genetics
_gv. 126, no. 5, p. 1237-1256
_dBerlin (Germany) : Springer, 2013.
_wu444762
_x0040-5752
856 4 _uhttps://hdl.handle.net/20.500.12665/1552
_yAccess only for CIMMYT Staff
942 _cJA
_2ddc
_n0