000			03039nab a22003737a 4500
001			G90378
003			MX-TxCIM
005			20220518164340.0
008			220518s2007 it |||p|op||| 00| 0 eng d
022			_a2279-8013
022			_a0025-6153e
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5252
100	1		_aCordova, H. _95333
245	1	0	_aCIMMYT maize hybrids for latin america : _bhead-to-head analysis and probability of outperforming the best check
260			_aBergamo, (Italy) : _bConsiglio per la Ricerca e la Sperimentazione in Agricoltura, _c2007.
340			_aComputer File|Printed
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0025-6153
500			_aPeer review
500			_aOpen Access
520			_aThe best-performing maize hybrid sent to Latin America in 1994 as part of the first CIMMYT international hybrid trials, and later used as a regular check in trials, was CML247 x CML254, a cross between two excellent CIMMYT maize lines (CMLs). Since then, many new lowland tropical maize hybrids have been developed. Additional comparisons between newly-developed CIMMYT hybrids and CML247 x CML254 could benefit national programs, seed companies, and CIMMYT work in Latin America. This study sought to identify the best new lowland tropical maize hybrids for Latin America by using head-tohead analysis and estimating their reliability, to replace CML247 x CML254 as a check in CIMMYT hybrid trials. In head-to-head comparisons, nine new hybrids showed significant yield gains over CML247 x CML254. Hybrids CL04368 x CL-SPLW04 and CL-02181 x CML269 had the highest yields and showed a reliability of over 0.9, suggesting that both will yield more than the old check in 9 out of 10 cases. Based on yield differences between the best new hybrid and the old check, the estimated genetic gain achieved by CIMMYT’s breeding efforts in lowland tropical maize was 279 kg ha-1 year-1 during 1994-2002. Only two of the hybrids studied showed significant regression slopes with respect to the check hybrid, and their advantages over the check could be due mainly to genotype x environment interaction (G x E). Hybrids CL-04368 x CLSPLW04 and CL-02181 x CML269 will be the new checks in CIMMYT field evaluations in Latin America and could be used by seed companies and public institutions in the region per se or as sources of favorable alleles.
546			_aText in English
650		7	_aBreeding _2AGROVOC _91029
650		7	_aMaize _2AGROVOC _91173
650		7	_aYield increases _2AGROVOC _94709
650		7	_aTropical zones _2AGROVOC _94259
700	1		_aTrifunovic, S. _97290
700	1		_aRamírez, A. _910769
700	1		_aSierra-Macias, M. _93741
773	0		_tMaydica _n635140 _gv. 52, no. 4, p. 471-476 _dBergamo (Italy) : Consiglio per la Ricerca e la Sperimentazione in Agricoltura, 2007. _wG444598 _x0025-6153
856	4		_yOpen Access through DSpace _uhttp://hdl.handle.net/10883/3061
942			_cJA _2ddc _n0
999			_c26976 _d26976