| 000 | 02867nam a22004937a 4500 | ||
|---|---|---|---|
| 001 | G67826 | ||
| 003 | MX-TxCIM | ||
| 005 | 20240919021112.0 | ||
| 008 | 121211s ||||f| 0 p|p||0|| | | ||
| 020 | _a92-9146-065-6 | ||
| 040 | _aMX-TxCIM | ||
| 072 | 0 | _aF30 | |
| 072 | 0 | _aH50 | |
| 090 | _aCIS-2669 | ||
| 110 | 2 | _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) | |
| 100 | 1 |
_aBanziger, M. _gResearch & Partnership Program _gExcellence in Breeding _8INT1888 _9834 |
|
| 245 | 0 | 0 | _aEvaluating the drought tolerance of some popular maize hybrids grown in Sub-Saharan Africa |
| 260 |
_aAddis Ababa (Ethiopia) _bCIMMYT|EARO : _c1999 |
||
| 300 | _ap. 61-63 | ||
| 340 | _aPrinted | ||
| 520 | _aDeveloping drought-tolerant maize germplasm has a unique importance for the Southern African Development Community (SADC) as maize production strongly fluctuates with seasonal rainfall. This study compares 16 commercial hybrids grown in the SADC region with a random set of testcrosses that was based on 288 drought-tolerant lines introduced from Mexico. The germplasm was evaluated at two to three rain-fed sites and under managed drought stress conditions in Zimbabwe 1996/97. Commercial hybrids yielded on average 23% better than drought- tolerant testcrosses under near optimal conditions. The opposite was observed under severe drought stress conditions where yields of the commercial hybrids were on average 27% less than those of the testcrosses. Commercial hybrids had a longer anthesis-silking interval and more barren plants, indicating the reason for their inferior drought tolerance relative to the testcrosses. We conclude that even though the commercial hybrids have been developed regionally using multi-location testing that supposedly included results from randomly drought stressed sites, deliberate improvement for drought tolerance may lead to maize germplasm with higher drought tolerance. Employing such methods to adapted germplasm may lead to drought-tolerant, responsive maize cultivars that may contribute to stabilized maize production in the SADC region. | ||
| 536 | _aResearch and Partnership Program | ||
| 546 | _aEnglish | ||
| 591 | _a0103|R98-99CIMPU|AL Maize Program|AGRIS 0102|3 | ||
| 593 | _aJose Juan Caballero | ||
| 594 | _aINT1888 | ||
| 595 | _aCSC | ||
| 650 | 1 | 0 | _aAfrica |
| 650 | 1 | 0 | _aAfrica south of Sahara |
| 650 | 1 | 0 |
_91080 _aDrought _gAGROVOC |
| 650 | 1 | 0 | _aDrought resistance |
| 650 | 1 | 0 | _aInjurious factors |
| 650 | 1 | 7 |
_aMaize _gAGROVOC _2 _91173 |
| 650 | 1 | 0 |
_aResearch projects _91237 |
| 653 | 0 | _aCIMMYT | |
| 650 | 1 | 0 |
_91314 _aZea mays _gAGROVOC |
| 650 | 1 | 0 |
_91313 _aYields _gAGROVOC |
| 650 | 1 | 7 |
_aPlant breeding _gAGROVOC _2 _91203 |
| 700 | 1 |
_aChisenga, M., _ecoaut. |
|
| 700 | 1 | _aCIMMYT|EARO | |
| 700 | 1 |
_aDamu, N., _ecoaut. |
|
| 700 | 1 |
_aMugabe, F., _ecoaut. |
|
| 942 | _cPRO | ||
| 999 |
_c9690 _d9690 |
||