000			04070nab a22005657a 4500
999			_c30498 _d30498
001			G98823
003			MX-TxCIM
005			20240919020947.0
008			121211b |||p||p||||||| |z||| |
022			_a1572-9788 (Revista en electrónico)
022	0		_a1380-3743
024	8		_ahttps://doi.org/10.1007/s11032-014-0068-5
040			_aMX-TxCIM
041	0		_aEn
090			_aCIS-7587
100	1		_aDias Almeida, G. _92243
245	1	0	_aMolecular mapping across three populations reveals a QTL hotspot region on chromosome 3 for secondary traits associated with drought tolerance in tropical maize
260			_c2014
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1380-3743
500			_aPeer review
500			_aOpen Access
520			_aIdentifying quantitative trait loci (QTL) of sizeable effects that are expressed in diverse genetic backgrounds across contrasting water regimes particularly for secondary traits can significantly complement the conventional drought tolerance breeding efforts. We evaluated three tropical maize biparental populations under water-stressed and well-watered regimes for drought-related morpho-physiological traits, such as anthesis-silking interval (ASI), ears per plant (EPP), stay-green (SG) and plant-to-ear height ratio (PEH). In general, drought stress reduced the genetic variance of grain yield (GY), while that of morpho-physiological traits remained stable or even increased under drought conditions. We detected consistent genomic regions across different genetic backgrounds that could be target regions for marker-assisted introgression for drought tolerance in maize. A total of 203 QTL for ASI, EPP, SG and PEH were identified under both the water regimes. Meta-QTL analysis across the three populations identified six constitutive genomic regions with a minimum of two overlapping traits. Clusters of QTL were observed on chromosomes 1.06, 3.06, 4.09, 5.05, 7.03 and 10.04/06. Interestingly, a ~8-Mb region delimited in 3.06 harboured QTL for most of the morpho-physiological traits considered in the current study. This region contained two important candidate genes viz., zmm16 (MADS-domain transcription factor) and psbs1 (photosystem II unit) that are responsible for reproductive organ development and photosynthate accumulation, respectively. The genomic regions identified in this study partially explained the association of secondary traits with GY. Flanking single nucleotide polymorphism markers reported herein may be useful in marker-assisted introgression of drought tolerance in tropical maize.
536			_aGlobal Maize Program|Research and Partnership Program|Genetic Resources Program
546			_aText in English
591			_aSpringer|CIMMYT Informa No. 1883
594			_aINT2948|INT3300|INT1888|CCJL01|INT2925
595			_aCSC
650	1	0	_aMetaQTL
650	1	0	_asecondary traits
650	1	0	_aSNP
650		7	_91082 _aDrought tolerance _2AGROVOC
650		7	_91853 _aQuantitative Trait Loci _2AGROVOC
650		7	_91848 _aGenetic markers _2AGROVOC
650		7	_92084 _aChromosome mapping _gAGROVOC
650		7	_91082 _aDrought tolerance _2AGROVOC
650		7	_93719 _aSoftware development _2AGROVOC
650		0	_aDNA Sequences _gAGROVOC _98666
700	1		_aBorem, A., _ecoaut.
700	1		_aNair, S., _ecoaut.
700	1		_9875 _aBABU, R. _gGlobal Maize Program _8INT2925
700	1		_9879 _aCairns, J.E. _gGlobal Maize Program _8INT2948
700	1		_aPrasanna, B.M. _gGlobal Maize Program _8INT3057 _9887
700	1		_9914 _aTrachsel, S. _gGlobal Maize Program _8INT3300 _ecoaut.
700	1		_aBanziger, M. _gResearch & Partnership Program _gExcellence in Breeding _8INT1888 _9834
700	1		_9835 _aRibaut, J.M. _gIntegrated Breeding Platform _8INT1991 _ecoaut.
700	1		_aCrossa, J. _gGenetic Resources Program _8CCJL01 _959
773	0		_tMolecular Breeding _gv. 34, no. 2, p. 701-715
856	4		_uhttps://hdl.handle.net/10883/19769 _yOpen Access through DSpace
942			_cJA _2ddc _n0