000			03575nab a22003977a 4500
001			G95554
003			MX-TxCIM
005			20230918224823.0
008			230609s2011 xr |||p|op||| 00| 0 eng d
022			_a1212-1975
022			_a1805-9325 (Online)
024	8		_ahttps://doi.org/10.17221/3263-CJGPB
040			_aMX-TxCIM
041			_aeng
090			_aCIS-6399
100	1		_aPawan Kumar Singh _gGlobal Wheat Program _8INT2868 _9868
245	1	0	_aEvaluation of CIMMYT germplasm for resistance to leaf spotting diseases of wheat
260			_aCzechia : _bCzech Academy of Agricultural Sciences, _c2011.
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1212-1975
500			_aPeer review
500			_aOpen Access
520			_aThe leaf spotting disease complex is a major biotic constrain in enhancing grain production in the major wheat growing regions. Two leaf spotting diseases, tan spot, caused by an ascomycete fungus Pyrenophora tritici-repentis, and Stagonospora nodorum blotch besides causing average yield losses of 5?10%, cause significant losses in grain quality by red smudge, black point and grain shriveling. Conservation agriculture in combination with wheat monoculture involving cultivation of susceptible cultivars has resulted in frequent onset of leaf spots epidemics worldwide. Development of resistant wheat cultivars, in conjunction with crop rotation, will provide an effective, economical, and environmentally safe means of controlling leaf spot. International Maize and Wheat Improvement Center (CIMMYT), Mexico has initiated major efforts to mitigate the threat of tan spot. Efforts include screening of wheat germplasm, identification of new sources of resistance, characterization of new tan spot resistance genes through classical and molecular genetic analysis, incorporation of resistance into adapted cultivars, and assessing the variability in the tan spot fungus. Screening studies reveal that elite CIMMYT germplasm has high level of resistance to tan spot caused by P. tritici-repentis race 1. These germplasm have diverse genetic make-up and the resistance is likely broad based. Association mapping studies done with CIMMYT germplasm reconfirmed the presence of previously identified genomic regions for tan spot resistance; however, novel genomic regions on long arm of chromosomes 6A and 7B have also been identified. Studies done to date indicate that CIMMYT germplasm possess high level diverse genetic based resistance to tan spot of wheat. Efforts are in place to develop desired wheat cultivars with tan spot resistance. Virulence studies indicate presence of P. tritici-repentis race 1 only with some variability in level of toxin Ptr ToxA produced in each of the 76 isolates studied.
536			_aGlobal Wheat Program|Research and Partnership Program
546			_aText in English
594			_aINT1237|INT2868|INT0610
595			_aCSC
650		7	_aGenetic resistance _92277 _2AGROVOC
650		0	_aPyrenophora tritici-repentis _gAGROVOC _92707
650		7	_aStagonospora _2AGROVOC _95961
650		7	_aSpots _2AGROVOC _913685
700	1		_9826 _aDuveiller, E. _gDG's Office _8INT1237
700	1		_aSingh, R.P. _gGlobal Wheat Program _8INT0610 _9825
773	0		_tCzech Journal of Genetics and Plant Breeding _gv. 47, no. Special Issue, p. S102-S108 _dCzechia : Czech Academy of Agricultural Sciences, 2011. _wG96206 _x1212-1975
856	4		_uhttp://hdl.handle.net/10883/2844 _yOpen Access through DSpace
942			_cJA _2ddc _n0
999			_c28678 _d28678