000			02702nam a22004217a 4500
001			G68371
003			MX-TxCIM
005			20230522175656.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-035-8
040			_aMX-TxCIM
072		0	_aF30
072		0	_aH20
082	0	4	_a632.4 _bGIN
100	0		_aXiuling Zhang _930870
110	2		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
245	0	0	_aDiallel analysis of Septoria tritici blotch resistance in winter wheat
260			_aMexico, DF (Mexico) _bCIMMYT : _c1999
340			_aPrinted
520			_aIn the winter wheat area of the northern Great Plains, leaf spot complex has been problematic in the past decade. In years with high precipitation from late April to July, septoria tritici blotch (STB), caused by Septoria tritici, is most prevalent. As part of our effort to improve STB resistance, inheritance of STB resistance was investigated by an eight-parent full diallel scheme. Parents, F 1 , and reciprocal F 1 were planted on three different dates. Within each planting date, three to five seeds of each experimental unit were planted in the greenhouse. Materials were arranged in a randomized complete block design (RCBD) with three replicates. Plants at the second-leaf stage were inoculated with a bulk of six S. tritici isolates. Significant general combining ability (GCA), specific combining ability (SCA), and reciprocal effects were observed in the analysis of variance. The ratio of GCA sum of squares relative to SCA sum of squares suggested that GCA was more important than SCA. Additive effects played the major role in host response to STB, while non-additive effects were also detected. General combining ability effects of individual genotypes were in close agreement with parental performance. KS94U338, a genotype with resistance derived from Triticum tauschii, had the lowest STB score and the highest general combining ability. This result indicates that this genotype, possessing resistance distinct from other known sources, should prove useful in breeding efforts to improve STB resistance in wheat.
536			_aGlobal Maize Program
546			_aEnglish
591			_a9910|AGRIS 0001
594			_aINT3400
595			_aCPC
650	1	0	_aCombining ability _92367
650	1	0	_aDiallel crossing
650	1	0	_aGenetic resistance _92277
650	1	7	_aPlant diseases _gAGROVOC _91206
650	1	0	_aSeptoria
650	1	0	_aWinter crops
650	1	7	_aTriticum _gAGROVOC _91295
653	0		_aCIMMYT
700	1		_aGinkel, M. van|McNab, A.|Krupinsky, J. _eeds.
700	1		_aHaley, S.D., _ecoaut.
700	1		_aJin, Y., _ecoaut.
942			_cPRO _2ddc
999			_c4386 _d4386