000			03277nab a22003977a 4500
001			G93571
003			MX-TxCIM
005			20230814164352.0
008			211110s2009 ir |||p|op||| 00| 0 eng d
022			_a1735-6814
022			_a1735-8043 (Online)
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5719
100	1		_aKaraya, H. _9150
245	1	0	_aCombining ability among twenty insect resistant maize inbred lines resistant to Chilo partellus and Busseola fusca Stem borers
260			_aIran : _bGUASNR, _c2009.
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1735-6814
520			_aA partial diallel design was used among 20 maize inbred lines to form 110 F1 hybrids to generate information on the values of these lines for developing insect resistant maize varieties during the short rains season of 2006. The hybrids were evaluated for resistance to the C. partellus and B. fusca, and for agronomic performance over two seasons during long and short rains of 2007 at a mid-altitude dry early maturity site at KARI Kiboko, and the moist mid-altitude medium maturity site at KARI Embu. leaf damage score (using a scale of 1-9 where: 1= No damage and 9= extremely damaged), number of exit holes, cumulative tunnel length, and grain yield were measured as resistance traits. The genotype sum of square was partitioned into general combining ability (GCA) and specific combining ability (SCA) effects. Maize inbred lines with good general combining ability for insect resistance including maize inbred lines with significant and negative GCA`s for leaf damage were identified as lines 12,16,18,19 and 20 at Kiboko and lines 8, 17, 18, and 20 in Embu. Results showed that the problem of stem borers intensified by over 40% within four years in the experimental region of Eastern Kenya; currently mean yield loss due to stem borers was assessed to be about 56%. Several hybrids had significant negative SCA for leaf damage and significant positive SCA for grain yield. The maize inbred lines studied revealed their potential for use in breeding programs for insect resistance that could result in a correlated response for increased grain yield. Recurrent selection would be the best option to develop high yielding insect resistant germplasm for this region of Kenya considering that additive gene action were predominant. Evidently, it would be more difficult to develop host plant resistance to B. fusca than to C. partellus.
536			_aGlobal Maize Program
546			_aText in English
594			_aINT2460
650		7	_aCombining ability _92367 _2AGROVOC
650		7	_aPest resistance _2AGROVOC _91199
650		7	_aPest insects _2AGROVOC _93760
650		7	_aMaize _91173 _2AGROVOC
650		7	_aStem eating insects _2AGROVOC _96439
651		7	_2AGROVOC _93783 _aKenya
700	1		_aNjoroge, K. _9230
700	1		_aMugo, S.N. _gFormerly Global Maize Program _8INT2460 _9840
700	1		_aNderitu, H. _924862
773	0		_tInternational Journal of Plant Production _gv. 3, no. 1, p. 115-126 _x1735-6814 _dIran : GUASNR, 2009.
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/827
942			_cJA _2ddc _n0
999			_c27904 _d27904