000			02923nam a22004457a 4500
001			G81247
003			MX-TxCIM
005			20211006084800.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-116-8
040			_aMX-TxCIM
072		0	_aE16
072		0	_aF01
090			_aLook under series title
100	1		_aArachchi, D.H.M. _uAsian Regional Maize Workshop, 8: New Technologies for the New Millennium
110	0		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico)
111	2		_aProceedings of the Asian Regional Maize Workshop _cBangkok (Thailand) _d5-8 Aug 2002
245	0	0	_aPerformance of maize (Zea mays L.) genotypes during post-germination drought
260			_aMexico, DF (Mexico) _bCIMMYT : _c2004
300			_ap. 427-440
340			_aPrinted
520			_aMaize crop establishment is often drought - impaired. A 7 - 10 day dry spell after germination is common. Experiments were designed to mimic this situation to determine if germination ability at low water potential could be used as a criterion to select for ability to sustain post germination growth. The four cultivars used had differences in their germination ability at low water potential. One, the improved variety pool 26, is known to be drought tolerant. Many of the adjustments in plant growth to water stress were typical of those reported for maize; there were no significant differences between indigenous and improved varieties. Decline of seedling height increase begins 2 to 3 days after stress. Leaf area was the most affected parameter; withholding water significantly increased the root: shoot ratio and decreased leaf area: root length ratio. The pool 26 showed a distinct response. Nodal root length significantly differed confirming the fact that many tropical maize cultivars have more nodal roots which absorb moisture from the top soil layer by altering the osmotic adjustment during drought compared to seminals and laterals. The total root length differed significantly between watered and un-watered plants. Results indicate several significant changes between watered and un-watered plants but the differences between cultivars in germination ability at low water potential did not reflect their relative tolerance to the drought situation
546			_aEnglish
591			_a0502|AGRIS 0501|AL-Maize Program
593			_aJuan Carlos Mendieta
595			_aCPC
650	1	7	_aCrop yield _gAGROVOC _2 _91066
650	1	0	_aDrought resistance
650	1	0	_aFood production _91116
650	1	0	_aGermination
650	1	7	_aMaize _gAGROVOC _2 _91173
650	1	0	_aWater potential
653	0		_aCIMMYT
650	1	0	_91314 _aZea mays _gAGROVOC
650	1	0	_91134 _aGenotypes _gAGROVOC
700	1		_aBingham, I.J., _ecoaut.
700	1		_aNaylor, R.E.L., _ecoaut.
700	1		_aSrinivasan, G.|Zaidi, P.H.|Prasanna, B.M.|Gonzalez, F.|Lesnick, K. _eeds.
942			_cPRO
999			_c7478 _d7478