000			04076nab a22004817a 4500
001			G78913
003			MX-TxCIM
005			20220624154053.0
008			220624s2003 xxu|||p|op||| 00| 0 eng d
022			_a1943-7692 (Online)
022			_a0191-2917
024	8		_ahttps://doi.org/10.1094/PDIS.2003.87.12.1522
040			_aMX-TxCIM
041			_aeng
072		0	_aF01
072		0	_aH20
090			_aCIS-3926
100	1		_aNavabi, A. _921863
245	1	0	_aGenetic analysis of adult-plant resistance to leaf rust in five spring wheat genotypes
260			_aSt. Paul, MN (USA) : _bAmerican Phytopathological Society, _c2003.
340			_aComputer File
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0191-2917
500			_aPeer review
500			_aOpen Access
520			_aInheritance of adult-plant resistance to leaf rust, caused by Puccinia triticina, was studied in the progeny of a one-way diallel cross involving five CIMMYT-derived adult-plant resistant wheat (Triticum aestivum) genotypes and a susceptible wheat ‘Avocet-YrA’. F1 progenies, F2 populations, F2-derived F3, and F4-derived F5 lines were field evaluated under artificial epidemics with leaf rust race MCJ/SP. Adult-plant resistance to leaf rust was incompletely dominant in crosses with the susceptible parent and was found to be controlled by additive interactions of Lr34 with at least two to three additional genes. Transgressive segregation giving rise to plants or lines with higher and lower levels of resistance than the parents was observed in all F2 and F5 derivatives of the resistant-parent intercrosses and suggested that, apart from Lr34, some of the other additive genes were nonallelic. Although specific combining ability was significant in some generations, general combining ability was found to be the major component of variation. Among generations, the estimates of the narrow-sense heritability of adult-plant resistance to leaf rust ranged from 0.67 to 0.97. Inheritance of adult-plant resistance to leaf rust, caused by Puccinia triticina Eriks., was studied in the progenies of crosses involving five adult-plant resistant wheat (Triticum aestivum L.) genotypes and a susceptible wheat ‘Avocet-YrA’. F1 progenies, F2 populations, F2-derived F3, and F4-derived F5 lines were field evaluated under artificial epidemics with leaf rust race MCJ/SP in two locations in Mexico. Adult-plant resistance to leaf rust was incompletely dominant in crosses with the susceptible parent and was found to be controlled by additive interactions of Lr34 with at least two to tree additional genes. Additive interactions of genes were found to be the major components of variation. Adult-plant resistance to leaf rust in the genotypes studied was found to be highly heritable. Plants or lines with higher and lower levels of resistance than the parents were observed in all F2 and F5 derivatives of the resistant-parent intercrosses and suggested that, apart from Lr34, some of the other additive genes were different. This indicated the possibility of incorporating these genes into new breeding lines. High levels of resistance in the resistant parents included in this study are expected to be durable.
536			_aGlobal Wheat Program
546			_aText in English
592			_aCA-UAlberta 2003 NAVABI D rf
594			_aINT0610
650		7	_91386 _aHeritability _2AGROVOC
650		7	_aPlant diseases _2AGROVOC _91206
650		7	_aDisease resistance _2AGROVOC _91077
650		7	_aRusts _2AGROVOC _91251
650		7	_aWheat _2AGROVOC _91310
700	1		_aSingh, R.P. _gGlobal Wheat Program _8INT0610 _9825
700	1		_aTewari, J.P. _922799
700	1		_aBriggs, K.G. _922800
740			_a78911
740			_a78913
773	0		_tPlant Disease _n632702 _gv. 87, no. 12, p. 1522-1529 _dSt. Paul, MN (USA) : American Phytopathological Society, 2003. _wG444690 _x0191-2917
856	4		_yOpen Access through DSpace _uhttp://hdl.handle.net/10883/2362
942			_cJA _2ddc _n0
999			_c24543 _d24543