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Effectiveness of yellow maize testers with varying resistance reactions to Striga hermonthica for evaluating the combining ability of maize inbred lines

dc.contributor.authorZebire, D.
dc.contributor.authorMenkir, A.
dc.contributor.authorAdetimirin, V.
dc.contributor.authorMengesha Abera, W.
dc.contributor.authorMeseka, S.
dc.contributor.authorGedil, M.
dc.date.accessioned2021-02-15T10:56:46Z
dc.date.available2021-02-15T10:56:46Z
dc.date.issued2020
dc.identifier.citationZebire, D., Menkir, A., Adetimirin, V., Mengesha, W., Meseka, S. & Gedil, M. (2020). Effectiveness of yellow maize testers with varying resistance reactions to Striga hermonthica for evaluating the combining ability of maize inbred lines. Agronomy, 10(9), 1276: 1-27.
dc.identifier.issn2073-4395
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7038
dc.description.abstractThe choice of an appropriate tester is important for success in resistance hybrid breeding programs. Limited information is available on the most suitable testers that allow the selection of yellow endosperm maize inbred lines with good combining ability for resistance to witchweed (Striga hermonthica) and superior agronomic performance in hybrids targeted to areas infested with the parasite. Testcrosses of 30 Striga-resistant yellow endosperm maize inbred lines with three testers having varying levels of resistance to S. hermonthica were evaluated at Abuja and Mokwa in Nigeria under Striga-infested and non-infested conditions in 2018 and 2019. The lines × tester interaction was significant for grain yield under Striga infestation, indicating that the performance lines in testcrosses varied with the testers. The respective average general combining ability effect of lines and testers was 1.5 and 32.4 times greater than the corresponding specific combining ability effects under infestation, showing the greater importance of additive gene action controlling the performance of testcrosses under Striga infestation. The different testers exhibited a different capacity to discriminate among the test lines with the susceptible tester being the least effective. Most of the criteria used to determine the best tester favored the selection of the tolerant and resistant testers as promising candidates to identify superior Striga-resistant yellow endosperm inbred lines for the hybridization and development of resistant hybrids. The results of this study demonstrated that testers with a high frequency of desirable alleles were superior to the tester with a low frequency of favorable alleles in hybrid breeding programs for resistance to S. hermonthica.
dc.description.sponsorshipAfrican Union
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-27
dc.language.isoen
dc.subjectMaize
dc.subjectStriga Hermonthica
dc.subjectPlant Breeding
dc.subjectDisease Resistance
dc.subjectNigeria
dc.subjectInbred Lines
dc.subjectCombining Ability
dc.titleEffectiveness of yellow maize testers with varying resistance reactions to Striga hermonthica for evaluating the combining ability of maize inbred lines
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Ibadan
cg.contributor.affiliationArba Minch University
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidZEBIRE:2020
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalAgronomy
cg.notesOpen Access Journal; Published online: 28 Aug 2020
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.3390/agronomy10091276
cg.iitaauthor.identifierAbebe Menkir: 0000-0002-5907-9177
cg.iitaauthor.identifierWende Mengesha: 0000-0002-2239-7323
cg.iitaauthor.identifierSILVESTRO MESEKA: 0000-0003-1004-2450
cg.iitaauthor.identifierMelaku Gedil: 0000-0002-6258-6014
cg.futureupdate.requiredNo


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