| dc.contributor.author | Yallou, C. |
| dc.contributor.author | Menkir, A. |
| dc.contributor.author | Adetimirin, V. |
| dc.contributor.author | Kling, J. |
| dc.date.accessioned | 2019-12-04T11:18:12Z |
| dc.date.available | 2019-12-04T11:18:12Z |
| dc.date.issued | 2007 |
| dc.identifier.citation | Yallou, C., Menkir, A., Adetimirin, V. & Kling, J. (2007). Combining ability of diverse maize inbred lines under Striga infestation in Nigeria and Benin, Demand-driven technologies for sustainable maize production in West and Central Africa: Proceedings of the fifth Biennial West and Central Africa Regional Maize Workshop, (p. 64-78), Cotonou, 3-6 May, 2005. Ibadan: IITA. |
| dc.identifier.uri | https://hdl.handle.net/20.500.12478/3107 |
| dc.description.abstract | Striga hermonthica (Del.) Benth. is a parasitic weed that seriously constrains maize (Zea mays L) production in sub-Saharan Africa. Yield losses from the infestation of S. hermonthica on maize can reach up to 100%. Host plant resistance is the most effective means of control of the weed, but the level of resistance in the presently available sources is not high enough to completely control the weed. Higher levels of resistance have been found in Zea diploperennis lltis, Doebley & Guzman, a wild relative of maize. The objective of this study was to determine the mode of inheritance of resistance to S. hermonthica in five inbred lines derived from Z. mays x Z. diploperennis crosses (Zd lines), one inbred line form TZL Composite 1, and four standard inbred lines. The ten lines were crossed in a diallel fashion and the resulting 45 single-cross hybrids were evaluated under artificial striga infestation at two locations each in Nigeria and Republic of Benin for two years. The results showed that general combining ability (GCA) mean squares were much larger than those for specific combining ability (SCN for grain yield under Striga infestation, Striga damage symptom score, and numbers of emerged Striga plants, indicating that for these traits, additive genetic effects were more important than non-additive effects. Interactions of hybrids with environments (years and locations) were significant for three traits. The Zd inbred lines had positive GCA values for grain yield and negative values for Striga damage symptom score, and numbers of emerged Striga plants, On the other hand the standard inbred lines, which were susceptible, had negative GCA values for grain yield and positive values for Striga damage symptom, score and number of emerged Striga plants, Inbred Zd 551 Was the most Striga –resistant line in the study. This line as well as other Zd lines may represent better sources of resistance to Striga than the standard inbred lines. |
| dc.description.abstract | Striga herntonthica (Del) Benth., est une herbe parasite limitant laproduction du mais Vea ntoys L.) en Afrique sub-Saharienne. Lespertes en rendement du mais dues ir S. hermontfu'co peuvent atteindre 100 %. La rEsistance genetique est la m6thode la plus efficace pourlutter contre cette plante parasite, mais le niveau de resistance dans legermplasme actuel n'est pas suffisant pour lutter contre le 5ar9o. Desniveaux elevds de r6sistanceont 6t6 decouvertes d ansZeodiploperennis,lltis, Doebley et Guzman, une une espdce sauvage voisine du ma'is.L'obiectif de cette etude etait de d€terminer le mode de transmissionde la resistance i Strigo chez de 5 nouvelles lignees derivees ducroisement Zeo mays x Z. diploperennis, une lignee autogame deriveedeTZLcomposite 1, et quatre lign6es standard. Les 10 lign6es ont et6crois6es dans un sch6ma dialldle et les 45 hybrides simples r6sultantsont 6t6 6valu6s sous infestation artificielle de Striga dans deux localitdschacune au Nig6ria et en Republique du Benin pendant deux ann6es.Les carr6s moyens de l'aptitude g6n6rale i la combinaison 6taientplus 6lev6s que ceux de l'aptitr-rde specifique i la combirraison pour lerendement grain sous infestation de Strigq les scores des dommageset le nombre de plants de Striga 6mer96s, indiquant que les effetsgen6tiques additifs 6taient plus importants que les effets non-additifsqui controlent ces caractdres. Les interactions entre hybrides et anneesd'une part et entre hybrides et localites d'autre part, etaient significatifspour tous les 3 caractdres. Les nouvelles lignfes Zd ont eu des effetspositifs d'aptitude gen6rale d la combinaison pour le rendement grainet des effets n6gatifs d'aptitr-rde generale i la combinaison pour lesscores d0s aux dommages de Strigo et le nombre de plants de Strigoemerges. Par contre, les lign6es susceptibles ont eu des effets negatifsd'aptitude g6n6rale d la combinaison pour le rendement grain et deseffets positifs d'aptitude gendrale i la combinaison pour les scores d0saux dommages de Strigo et le nombre de plants de Strigct 6merg6s.La lign6e zd 551 etait la lign6e la plus r6sistante au striga de toutel'6tude. Les nouvelles lign6es Zd peuvent representer de meilleurssources de resistance au Strigo que l'ensemble des vieilles lign6e. |
| dc.description.sponsorship | Rockefeller Foundation |
| dc.language.iso | en |
| dc.language.iso | fr |
| dc.subject | Striga Hermonthica (Del.) Benth. |
| dc.subject | Maize |
| dc.subject | Plant Resistance |
| dc.subject | Zea Diploperennis Lltis |
| dc.title | Combining ability of diverse maize inbred lines under Striga infestation in Nigeria and Benin |
| dc.type | Conference Paper |
| dc.description.version | Peer Review |
| cg.contributor.affiliation | Institut National des Recherches Agricoles du Bénin |
| cg.contributor.affiliation | International Institute of Tropical Agriculture |
| cg.contributor.affiliation | University of Ibadan |
| cg.contributor.affiliation | Oregon State University |
| cg.coverage.region | Africa |
| cg.coverage.region | West Africa |
| cg.coverage.country | Nigeria |
| cg.coverage.country | Benin |
| cg.authorship.types | CGIAR and developing country institute |
| cg.iitasubject | Maize |
| cg.iitasubject | Plant Diseases |
| cg.iitasubject | Plant Health |
| cg.iitasubject | Plant Breeding |
| cg.accessibilitystatus | Limited Access |
| local.dspaceid | 94573 |
