000			03387nab a22004337a 4500
001			G83011
003			MX-TxCIM
005			20230918200506.0
008			211103s2005 xxu|||p|op||| 00| 0 eng d
022			_a0735-9640
022			_a1572-9818 (Online)
024	8		_ahttps://doi.org/10.1007/BF02772706
040			_aMX-TxCIM
041			_aeng
090			_aCIS-4660
100	0		_aYannong Xiao _924632
245	1	0	_aQuantitative trait locus analysis of drought tolerance and yield in maize in China
260			_aUSA : _bSpringer, _c2005.
340			_aPrinted|Computer File
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0735-9640
520			_aDrought accounts for significant yield losses in crops. Maize (Zea mays L.) is particularly sensitive to water stress at reproductive stages, and breeding to improve drought tolerance has been a challenge. By use of a linkage map with 121 single sequence repeat (SSR) markers, quantitative trait loci (QTLs) for grain yield and yield components were characterized in the population of the cross X178×B73 under water-stressed and well-watered conditions. Under the well-watered regime, 2, 4, 4, 1, 2, 2, and 3 QTLs were identified for grain yield, 100-kernel weight, kernel number per ear, cob weight per ear, kernel weight per ear, ear weight, and ear number per plant, respectively, whereas under the water-stressed conditions, 1, 5, 2, 6, 1, 3, and 2 QTLs, respectively, were found. The significant phenotypic correlations among yield and yield components to some extent were observed under both water conditions, and some overlaps between the corresponding QTLs were also found. QTLs for grain yield and kernel weight per ear under well-watered conditions and ear weight under both well-watered and water-stressed conditions over-lapped, and all were located on chromosome 1.03 near marker bnlg176. Two other noticeable QTL regions were on chromosome 9.05 and 9.07 near markers umc1657 and bnlg1525; the first corresponded to grain yield, kernel weight per ear, and ear weight under well-watered conditions and kernel number per ear under both water conditions, and the second to grain yield and cob weight per ear under water-stressed conditions and ear number per plant under both water conditions. A comparative analysis of the QTLs herein identified with those described in previous studies for yield and yield components in different maize populations revealed a number of QTLs in common. These QTLs have potential use in molecular marker-assisted selection.
536			_aResearch and Partnership Program
546			_aText in English
591			_a0602
594			_aINT2451
650		7	_2AGROVOC _91853 _aQuantitative Trait Loci
650		7	_2AGROVOC _91081 _aDrought stress
650		7	_2AGROVOC _91313 _aYields
650		7	_2AGROVOC _91314 _aZea mays
700	0		_aXinhai Li _94207
700	1		_9839 _aGeorge, M.L.C. _gResearch & Partnership Program _8INT2451
700	0		_aMingshun Li _910249
700	0		_aShihuang Zhang _96604
700	0		_aYonglian Zheng _924631
773	0		_tPlant Molecular Biology Reporter _n633935 _gv. 23, no. 2, p. 155-165 _dUSA : Springer, 2005. _x0735-9640 _wG447887
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/927
942			_cJA _2ddc _n0
999			_c26143 _d26143