000			02845nab a22003857a 4500
001			G91327
003			MX-TxCIM
005			20241216084416.0
008			211108s2009 xxu|||p|op||| 00| 0 eng d
022			_a1435-0653 (Online)
024	8		_ahttps://doi.org/10.2135/cropsci2007.06.0326
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5453
100	1		_aGarcía-Lara, S. _97068 _gGlobal Maize Program
245	1	0	_aMapping of QTL associated with maize weevil resistance in tropical maize
260			_aUSA : _bCSSA : _bWiley, _c2009.
340			_aComputer File
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0011-183X
520			_aThe maize weevil (MW), Sitophilus zeamais (Motsch.), is an important pest of stored maize (Zea mays L.) in tropical areas. Quantitative trait loci (QTL) associated with MW resistance were analyzed. A total of 163 F2 progeny derived from the cross CML290 (susceptible) × Muneng-8128 C0 HC1-18-2-1-1 (resistant), were genotyped with 151 molecular markers. Resistance was evaluated using bioassays on replicated F2:3 progenies. Grain damage (GD), grain weight losses (GWL), MW susceptibility index (Dobie index [DI]), and numbers of adult progeny (AP) were evaluated on grain from F2 lines across two environments. Grain hardness and pericarp/grain ratio were evaluated as putative components of resistance. Composite interval mapping was used for QTL analysis. Five QTL dispersed across the genome explained 28% of the phenotypic variance (σp2) and 50% of the genotypic variance (σg2) for GD. Six QTL were detected with effects on GWL and explained 22% of σp2 and 47% of σg2 Seven QTL (27% σp2 and 78% σg2) were identified for DI and three QTL (10% σp2 and 23% σg2) for AP. Both parents contributed resistance alleles. Genetic effects were mainly dominant (GD, GWL, and DI) and additive (AP). Quantitative trait loci × environment interaction was significant for 50% of the QTL. Since the identified QTL accounted for less than a third of σp2, additional mapping populations are required for mapping MW susceptibility.
546			_aText in English
591			_a0903|Crop Science Society of America (CSSA)|Berta
650		7	_2AGROVOC _91173 _aMaize
650		7	_2AGROVOC _92534 _aSitophilus zeamais
650		7	_2AGROVOC _91853 _aQuantitative Trait Loci
650		7	_2AGROVOC _91199 _aPest resistance
650		7	_2AGROVOC _94259 _aTropical zones
700			_aKhairallah , M. _97421
700	1		_aVargas, M. _93542
700	1		_aBergvinson, D.J. _96743
773	0		_tCrop Science _n637918 _gv. 49, no. 1, p. 139-149 _x1435-0653 _wG444244 _dUSA : CSSA : Wiley, 2009.
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/978
942			_cJA _2ddc _n0
999			_c27304 _d27304