000			03394nab a22004337a 4500
001			G98943
003			MX-TxCIM
005			20230203190003.0
008			201124s2014 nr |||p|op||| 00| 0 eng d
022	0		_a1991-637X
024	8		_ahttps://doi.org/10.5897/AJAR12.1315
040			_aMX-TxCIM
041			_aeng
090			_aCIS-7605
100	1		_aKaraya, H. _9150
245	1	0	_aCombining ability of maize (Zea mays) inbred lines resistant to Striga hermonthica (Del.) Benth evaluated under artificial Striga infestation
260			_aNigeria : _bAcademic Journals, _c2014.
500			_aPeer review
500			_aOpen Access
520			_aThe parasitic weed Striga affects maize on an estimated 20 million ha in Africa, making it a major cause of maize yield reduction from near world average of 4.2 t/ha few decades ago to the present 1.5 t/ha. The objectives of this study were to examine the combining ability of 20 inbred lines and identify single crosses which can be used to develop other hybrids resistant to Striga hermonthica (Del.) Benth. Fourteen female lines were mated using North Carolina Design II with all six males. The resulting 84 F1s along with six commercial checks were evaluated in four separate trials for two rainy seasons during 2010. The trials were conducted on station under both artificial Striga infestation and Striga free environments using standard procedures at the Kibos and Alupe sites, both in the Kenya?s Lake Victoria Basin. Data were recorded on Striga counts, Striga damage rating (SDR), grain yield and other agronomic traits. General combining ability (GCA) and specific combining ability (SCA) effects were computed using SAS. The new F1 hybrids outperformed the commercial checks in grain yield and reaction to Striga. Single crosses JI-30-3/TESTR 151, JI-30-18/TESTR 151, CML206//56/44-6-3-7-1/TESTR 149 and JI-30-18/TESTR 156 gave the highest yield while single cross JI10-28-#/TESTR 136 gave the lowest yield. The ratio of GCA: SCA mean squares exhibited a predominance of additive gene effects in the inheritance of Striga resistance traits as opposed to dominance gene effects. Inbred lines with good GCA for yield and Striga resistance traits were identified as TESTR 151, TESTR 156 and OSU231//56/44-6-4-17-3. The high GCA inbred lines and the superior single crosses will provide a basis for future use perse and also development of three-way and double cross hybrids to be grown in Striga prone areas of the Lake Victoria Basin in eastern Africa.
536			_aGlobal Maize Program|Conservation Agriculture Program
546			_aText in English
591			_aCIMMYT Informa No. 1891
594			_aINT2460|INT2340
595			_aCSC
650		7	_aMaize _2AGROVOC _91173
650		7	_aStriga hermonthica _2AGROVOC _96854
650		7	_aCombining ability _2AGROVOC _92367
650		7	_aDisease resistance _2AGROVOC _91077
651		7	_2AGROVOC _91950 _aAfrica South of Sahara
700	1		_aNjoroge, K., _9230
700	1		_aMugo, S.N. _gFormerly Global Maize Program _8INT2460 _9840
700	1		_917192 _aAriga, E.S.
700	1		_9546 _aKanampiu, F.
700	1		_917193 _aNderitu, J.
773	0		_tAfrican Journal of Agricultural Research _gv. 9, no. 16, p. 1287-1295 _dNigeria : Academic Journals, 2014. _w89502 _x1991-637X
856	4		_yOpen Access through DSpace _uhttps://hdl.handle.net/10883/21443
942			_cJA _2ddc _n0
999			_c30543 _d30543