000			03265nab a22004217a 4500
001			G76643
003			MX-TxCIM
005			20230929180914.0
008			210810s2003 ne |||p|op||| 00| 0 eng d
022			_a0378-4290
024	8		_ahttps://doi.org/10.1016/S0378-4290(03)00061-3
040			_aMX-TxCIM
041			_aeng
072		0	_aA50
072		0	_aF30
090			_aCIS-3705
100	1		_aBetran, F.J. _96551
245	1	0	_aSecondary traits in parental inbreds and hybrids under stress and non-stress environments in tropical maize
260			_aAmsterdam (Netherlands) : _bElsevier, _c2003.
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=0378-4290
520			_aSecondary traits other than grain yield (GY) have been successfully used to enhance the rate of genetic improvement for maize (Zea mays L.) populations under abiotic stresses. With increasing trend towards the development of hybrids in the tropics there is a need to understand the genetics of these traits in inbred–hybrid breeding systems. The objectives of this study were to estimate the general combining abilities for secondary traits and their relationship with GY in a group of tropical white inbred lines and their hybrids under stress and non-stress environments. Traits were measured in inbred lines and their hybrid combinations across stress and non-stress subtropical and tropical environments in México. Hybrids showed earlier flowering, taller plants, more ears per plant (EPP), higher shelling percentage, slower leaf senescence, and higher leaf chlorophyll content than inbreds under all environments. La Posta Sequı́a (LP)-derived inbreds in general had desirable GCA for traits such as anthesis–silking interval (ASI), EPP, and leaf senescence but were more susceptible to foliar diseases. Conventionally bred maize lines had better standability, stay green, and resistance to diseases. Higher GY in lines and hybrids was associated with shorter ASI, earlier flowering, increased plant and ear height, increased EPP, increased shelling percentage, delayed senescence, and greater leaf chlorophyll concentrations. Under stress vs. non-stress conditions, we observed a higher variability for ASI and EPP, a higher inbred–hybrid correlation, and significant correlations between these traits and GY. Inbreds from LP appear to have high frequency of favorable dominant alleles for ASI and EPP.
536			_aResearch and Partnership Program
546			_aText in English
591			_a0307|Elsevier|AL-Maize Program
594			_aINT1888
650		7	_91314 _aZea mays _2AGROVOC
650		7	_92367 _aCombining ability _2AGROVOC
650		7	_91155 _aInbred lines _2AGROVOC
650		7	_91151 _aHybrids _2AGROVOC
700	1		_aBeck, D. _96306
700	1		_aBanziger, M. _gResearch & Partnership Program _gExcellence in Breeding _8INT1888 _9834
700	1		_95520 _aEdmeades, G.O.
773	0		_tField Crops Research _n632243 _gv. 83, no. 1, p. 51-65 _dAmsterdam (Netherlands) : Elsevier, 2003. _wG444314 _x0378-4290
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/1006
942			_cJA _2ddc _n0
999			_c22912 _d22912