000			03217nab a22004577a 4500
001			G64116
003			MX-TxCIM
005			20250211020911.0
008			121211b |||p||p||||||| |z||| |
022			_a1573-5060 (Revista en electrónico)
040			_aMX-TxCIM
090			_aLook _bunder journal title
100	1		_aChapman, S.C.
245	0	0	_aGenotype by environment effects and selection for drought tolerance in tropical maize. 2: _b Three-mode pattern analysis
260			_c1997
340			_aPrinted
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0014-2336
520			_aA selection program in three tropical maize populations aimed to improve tolerance of mid-season to late season drought environments while maintaining grain yield (GY) potential. The selection process employed other attributes that included maintaining a constant anthesis date (AD) and, under drought, shortening the anthesis-silking interval (ASI) and increasing ear number per plant (EPP). Three-mode (genotypes x environments x attributes) pattern analysis, which consists of clustering and ordination, should be able to collectively interpret these changes from ten evaluation trials. Mixture maximum likelihood clustering identified four groups that indicated the populations' performance had changed with selection. Groups containing the advanced cycles of selection were higher yielding in most environments and had lower ASI and higher EPP, particularly in drought environments. Check entries with no selection for drought tolerance remained grouped with the initial cycles of selection. A 3 x 2 x 3 (genotypes by environments by attributes) principal component model explained 70% of the variation. For the first environmental component, ASI was shown to be highly negatively correlated with both GY and EPP while anthesis date (AD) was virtually uncorrelated with other traits. The second environmental component (explaining 10% of the variation) contrasted droughted and well-watered environments and showed that EPP and GY were better indicators of this contrast (in terms of changes in population performance) than were AD or ASI. Three-mode analysis demonstrated that improvements with selection occurred in both droughted and well-watered environments and clearly summarised the overall success of the breeding program
536			_aGenetic Resources Program
546			_aEnglish
591			_a9706|Springer|EE|Maria|R97ANALY|Fdo|1
594			_aCCJL01
595			_aCSC
595			_aSC
650	1	0	_91080 _aDrought _gAGROVOC
650	1	0	_aDrought resistance
650	1	0	_aFlowering
650	1	0	_91133 _aGenotype environment interaction _gAGROVOC
650	1	7	_aMaize _gAGROVOC _2 _91173
650	1	0	_aResearch projects _91237
650	1	0	_aSampling
653	0		_aTropical maize CIMMYT
650	1	0	_91314 _aZea mays _gAGROVOC
650	1	0	_91313 _aYields _gAGROVOC
650	1	7	_aPlant breeding _gAGROVOC _2 _91203
700	1		_91429 _aBasford, K.E.
700	1		_aKroonenberg, P.M., _ecoaut.
700	1		_aCrossa, J. _gGenetic Resources Program _8CCJL01 _959
773	0		_tEuphytica _gv. 95, no. 1, p. 11-20
942			_cJA
999			_c18469 _d18469