000			02860nam a22004577a 4500
001			G80351
003			MX-TxCIM
005			20240919021105.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-120-6
040			_aMX-TxCIM
072		0	_aF30
072		0	_aF63
082	0	4	_a338.16 _bFRI
100	1		_aTulu, L. _uIntegrated Approaches to Higher Maize Productivity in the New Millennium
110	0		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Kenya
111	2		_a7. Proceedings of the Eastern and Southern Africa Regional Maize Conference _cNairobi (Kenya) _d5-11 Feb 2002
245	0	0	_aHeterosis and genetic diversity in crosses of seven east african maize (Zea mays L.) populations
260			_aNairobi (Kenya) _bKARI|CIMMYT : _c2002
300			_ap. 125-129
340			_aPrinted
520			_aSeven East African maize populations were crossed in a diallel series. The seven parents and 21 crosses (excluding reciprocals) were evaluated at two locations; Jimma and Mettu, in the Southwestern part of Ethiopia in a randomized complete block design with four replications. The objectives were (1) to determine the extent of genetic diversity among the populations based on the level of yield heterosis of their F1 progenies and (2) to identify heterotic populations that could be used as sources of inbred lines in a hybrid breeding programme. The study indicated wide genetic diversity among some of the populations as indicated by high level of yield heterosis over the mid- and high-parent. Hence, Kitale Composite B (KCB) and Abo-Bako, Ukuruguru Composite A (UCA) and Abo-Bako, and UCA and KCB were found to be the most genetically diverse populations showing high-parent yield heterosis of 55.3, 41.3 and 36.0%, respectively. On the other hand, A-511 was observed to be genetically closely related with Ukuruguru Composite B (UCB), Kitale Composite C (KCC), Bako Composite and Abo-Bako. Similarly Bako-Composite was closely related with UCB and KCC. Based on the level of their F1 yield heterosis, KCB and Abo-Bako were identified as heterotic populations to be used in hybrid breeding programme. Further breeding methods through which these populations could be exploited are suggested.
546			_aEnglish
591			_a0410|AGRIS 0401|AL-Maize Program
593			_aJuan Carlos Mendieta
595			_aCPC
650	1	0	_aCrossbreeding
650	1	0	_aEthiopia
650	1	7	_aGermplasm _gAGROVOC _2 _91136
650	1	0	_91145 _aHeterosis _gAGROVOC
650	1	7	_aMaize _gAGROVOC _2 _91173
653	0		_aCIMMYT
653	0		_aKARI
650	1	7	_aGenetic resources _gAGROVOC _2 _91127
650	1	0	_91314 _aZea mays _gAGROVOC
650	1	0	_91313 _aYields _gAGROVOC
650	1	0	_91151 _aHybrids _gAGROVOC
650	1	7	_aPlant breeding _gAGROVOC _2 _91203
700	1		_aFriesen, D.K.|Palmer, A.F.E. _eeds.
942			_cBK
999			_c7362 _d7362