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Optimizing use of U.S. Ex-PVP inbred lines for enhancing agronomic performance of tropical Striga resistant maize inbred lines

dc.contributor.authorSayadi Maazou, A.R.
dc.contributor.authorGedil, M.
dc.contributor.authorAdetimirin, V.
dc.contributor.authorMengesha Abera, W.
dc.contributor.authorMeseka, S.K.
dc.contributor.authorIlesanmi, O.J.
dc.contributor.authorAgre, A.P.
dc.contributor.authorMenkir, A.
dc.date.accessioned2022-07-04T09:36:45Z
dc.date.available2022-07-04T09:36:45Z
dc.date.issued2022-06-10
dc.identifier.citationSayadi Maazou, A.R., Gedil, M., Adetimirin, V., Mengesha, W., Meseka, S., Ilesanmi, O., ... & Menkir, A. (2022). Optimizing use of US Ex-PVP inbred lines for enhancing agronomic performance of tropical Striga resistant maize inbred lines. BMC Plant Biology, 22(1):286, 1-14.
dc.identifier.issn1471-2229
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7532
dc.description.abstractBackground Temperate maize inbred lines with expired Plant Variety Protection Act certificates (Ex-PVP) are potential sources of desirable alleles for tropical germplasm improvement. Up to now, the usefulness of the Ex-PVP inbred lines as a potential source of novel beneficial alleles for Striga hermonthica resistance breeding to enhance genetic gain in tropical maize has not been reported. Results This study was thus conducted to characterize the combining ability of 24 Ex-PVP inbred lines in crosses with two tropical Striga resistant inbred testers under Striga-infested and non-infested conditions and across three locations for 2 years. Many testcrosses between Ex-PVP inbred lines and the first tester (T1) produced competitive or significantly higher grain yields compared to the hybrid between the two resistant testers under Striga infested and non-infested conditions and across multiple test locations. Also, most of the testcrosses with positive heterosis for grain yield and negative heterosis for Striga damage and emerged Striga count involved T1 as a tester. Our study identified six Ex-PVP inbred lines with positive GCA effects for grain yield under Striga infested and non-infested conditions and across multiple test locations. Amongst these, inbred lines HB8229-1 and WIL900-1 also displayed negative GCA effects for emerged Striga count and Striga damage rating. The inbred line HB8229-1 showed positive SCA effects for grain yield with T2, whereas WIL900-1 had positive SCA effects for grain yield with T1. Over 70% of the Ex-PVP inbred lines were consistently assigned to specific heterotic groups using yield-based classifying methods (mean grain yield and SCA effects). Conclusions These results could facilitate systematic introgression of the Ex-PVP inbred lines into the existing Striga resistant heterotic groups in IITA. The Ex-PVP inbred lines with positive GCA effects and producing high grain yields in hybrid combinations could be useful parents for enhancing Striga resistance and agronomic performance of tropical maize hybrids.
dc.description.sponsorshipAfrican Union
dc.description.sponsorshipPan African University
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-14
dc.language.isoen
dc.subjectExotic germplasm
dc.subjectInbred Lines
dc.subjectTropical crops
dc.subjectMaize
dc.subjectBreeding
dc.subjectCombining ability
dc.subjectStriga hermonthica
dc.titleOptimizing use of U.S. Ex-PVP inbred lines for enhancing agronomic performance of tropical Striga resistant maize inbred lines
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Ibadan
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidSAYADIMAAZOU:2022
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAflatoxin
cg.iitasubjectAgronomy
cg.iitasubjectCrop Systems
cg.iitasubjectFood Science
cg.iitasubjectFood Security
cg.iitasubjectFood Systems
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.journalBMC Plant Biology
cg.notesOpen Access Journal
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1186/s12870-022-03662-1
cg.iitaauthor.identifierMelaku Gedil: 0000-0002-6258-6014
cg.iitaauthor.identifierWende Mengesha: 0000-0002-2239-7323
cg.iitaauthor.identifierSILVESTRO MESEKA: 0000-0003-1004-2450
cg.iitaauthor.identifierPaterne AGRE: 0000-0003-1231-2530
cg.iitaauthor.identifierAbebe Menkir: 0000-0002-5907-9177
cg.futureupdate.requiredNo
cg.identifier.issue286
cg.identifier.volume22
cg.contributor.acknowledgementsMaize Improvement Program and the Bioscience Center at IITA in Ibadan, Nigeria; Nnanna Unachukwu


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