000			02204nab a22003737a 4500
001			G65016
003			MX-TxCIM
005			20240919021139.0
008			121211b |||p||p||||||| |z||| |
040			_aMX-TxCIM
090			_aCIS-2815
100	1		_aElings, A.
245	0	0	_aOptions for breeding for greater maize yields in the tropics
260			_c1997
340			_aPrinted
500			_aPeer-review: Yes - Open Access: Yes|Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1161-0301
520			_aOptions for breeding for greater maize yields in the tropics were quantitatively examined with a crop growth simulation model that was tested against field data of five genotypes in four environments. Simulations indicate that at high production levels, grain filling of maize is sink-limited, and that increasing the number of kernels per m(2) through larger primary ears, prolificacy or greater plant densities, will lead to increased grain yields. On a theoretical basis, it is concluded that larger primary ears lead to greater grain yields at all plant growth rates, and that increased prolificacy leads to greater grain yields only if plant growth rate exceeds a threshold. Under nitrogen limited growing conditions, selecting for genotypes that extract more nitrogen from soils, and for delayed leaf senescence, show promise for increasing yields. For crop growth limited by moisture availability around flowering, continued selection for improved kernel set leads to greater grain yields
546			_aEnglish
591			_aR97-98ANALY|Elsevier|Maria|9712|EE|anterior|Fdo|FINAL9798|3
595			_aCSC
650	1	0	_91133 _aGenotype environment interaction _gAGROVOC
650	1	7	_aMaize _gAGROVOC _2 _91173
650	1	0	_aResearch projects _91237
650	1	0	_aSimulation models _92569
650	1	0	_aTropical zones
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		_aEdmeades, G.O., _ecoaut.
700	1		_aWhite, J.W., _ecoaut. _91789
773	0		_tEuropean Journal of Agronomy _n649377 _gv. 7, no. 1-3, p. 119-132
942			_cJA
999			_c18545 _d18545