000			03015nam a22004577a 4500
001			G80348
003			MX-TxCIM
005			20211006084754.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-120-6
040			_aMX-TxCIM
072		0	_aE16
072		0	_aF30
082	0	4	_a338.16 _bFRI
100	1		_aMuriithi, M.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	_aGenetic variability of maize genotypes for resistance to Exerohilium turcicum in Kenya
260			_aNairobi (Kenya) _bKARI|CIMMYT : _c2002
300			_ap. 106-109
340			_aPrinted
520			_aMaize (Zea mays L) is the most important staple food crop in Kenya. Despite its importance, maize production is limited due to a number of factors, among them diseases and insect pests. Highland leaf blight caused by Exerohilium turcicum (Pass.) Leonard & Suggs is one of the most economically important diseases of maize in Kenya. Various maize genotypes were screened for genetic variability for resistance to E. turcicum in the greenhouse and the field. Plants were inoculated at the 6-7 leaf stage. Greenhouse test plants were incubated for 24 hrs at 100% relative humidity. Disease severity ratings were recorded two weeks after inoculation on a 0 to 5 scale in the field, and in the greenhouse the lesion lengths and widths were measured. The ratings were significantly different among genotypes and some entries were segregating into groups of resistant, intermediate and susceptible. Mean lesion length ranged from 2.73 cm for POPL 32 to 8.97 cm for M30 while width varied from 0.25 cm for PR98A to 0.57 cm for M30. Mean ratings in the field ranged from 0.5 for three entries to 3.0 for Embu 12X CN211. The resistant and/or segregating genotypes appeared adapted and have potential in Embu and other areas with a similar environment. The resistant genotypes identified need to be evaluated against blight and other major diseases under controlled or different environmental conditions at diverse locations. Identification of resistant genotypes is useful in a maize breeding programme where blight is of concern for general varietal improvement.
546			_aEnglish
591			_a0410|AGRIS 0401|AL-Maize Program
593			_aJuan Carlos Mendieta
595			_aCPC
650	1	0	_aFood crops _91994
650	1	0	_aGenetic resistance _92277
650	1	7	_aGenetic variation _gAGROVOC _2 _91129
650	1	7	_aMaize _gAGROVOC _2 _91173
650	1	7	_aQuality _gAGROVOC _2 _91231
650	1	0	_aYield factors
653	0		_aCIMMYT
653	0		_aKARI
650	1	0	_91314 _aZea mays _gAGROVOC
650	1	0	_91313 _aYields _gAGROVOC
650	1	0	_91134 _aGenotypes _gAGROVOC
700	1		_aFriesen, D.K.|Palmer, A.F.E. _eeds.
700	1		_aMutinda, C.J.M., _ecoaut.
942			_cBK
999			_c7359 _d7359