000			02746nab a22003617a 4500
001			G82838
003			MX-TxCIM
005			20230223183639.0
008			211103s2006 xxu|||p|op||| 00| 0 eng d
022			_a1435-0653 (Online)
024	8		_ahttps://doi.org/10.2135/cropsci2005.04-0034
040			_aMX-TxCIM
041			_aeng
090			_aCIS-4594
100	1		_aMonneveux, P. _920326
245	1	0	_aDrought tolerance improvement in tropical maize source populations : _bevidence of progress
260			_aUSA : _bCSSA : _bWiley, _c2006.
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=0011-183X
520			_aThe objectives of this study were to evaluate direct and correlated responses to recurrent selection for drought tolerance in two CIMMYT maize (Zea mays L.) source germplasm populations, ‘DTP1’ and ‘DTP2’, adapted to the lowland and mid-altitude tropics. Selection was primarily based on grain yield, ears per plant, anthesis-silking interval, and leaf senescence under drought. Cycles C0, C3, and C6 of DTP1 and C0, C3, C5 and C9 of DTP2 were evaluated under drought, low N, and optimal conditions. In both populations, significant yield gains were observed under drought conditions, associated with a significant increase in numbers of ears per plant and grains per ear, and significant reductions in anthesis-silking interval, ovule number and abortion rate during grain filling. Abortion rate was positively correlated with the number of ovules at silking and with anthesis-silking interval. In DTP1, recurrent selection under drought was associated with a derease of tassel and stem dry weight and with an increase of ear dry weight and harvest index. This study confirms the effectiveness of recurrent selection under drought as a means of improving tropical maize source populations for performance under water deficits and to a lesser extent under low N. The primary mechanism underlying these changes appears to be improved partitioning of assimilates to the ear at flowering, at the expense of tassel and stem growth.
546			_aText in English
591			_aCrop Science Society of America (CSSA)|0009
650		7	_2AGROVOC _91082 _aDrought tolerance
650		7	_2AGROVOC _91173 _aMaize
650		7	_2AGROVOC _912374 _aRecurrent selection
700	1		_aSánchez, C. _94725
700			_aBeck, D. _96306
700	1		_aEdmeades, G.O. _95520
773	0		_tCrop Science _n633724 _gv. 46, no. 1, p. 180-191 _dUSA : CSSA : Wiley, 2006. _wG444244 _x1435-0653
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/904
942			_cJA _2ddc _n0
999			_c26043 _d26043