Show simple item record

Heterotic affinity and combining ability of exotic maize inbred lines for resistance to aflatoxin accumulation

dc.contributor.authorMeseka, S.
dc.contributor.authorWilliams, W.P.
dc.contributor.authorWarburton, M.L.
dc.contributor.authorBrown, R.L.
dc.contributor.authorAugusto, J.
dc.contributor.authorOrtega-Beltran, A.
dc.contributor.authorBandyopadhyay, Ranajit
dc.contributor.authorMenkir, A.
dc.date.accessioned2019-12-04T11:26:30Z
dc.date.available2019-12-04T11:26:30Z
dc.date.issued2018-09-25
dc.identifier.citationMeseka, S., Williams, W.P., Warburton, M.L., Brown, R.L., Augusto, J., Ortega-Beltran, A., ... & Menkir, A. (2018). Heterotic affinity and combining ability of exotic maize inbred lines for resistance to aflatoxin accumulation. Euphytica, 214(10):184, 1-15.
dc.identifier.issn0014-2336
dc.identifier.urihttps://hdl.handle.net/20.500.12478/4627
dc.descriptionOpen Access Article; published online: 25 Sept 2018
dc.description.abstractAflatoxin accumulation in maize (Zea mays L.) kernels is a serious economic and health problem that reduces grain quality and nutritional values and causes death to livestock and humans. Understanding the genetic parameters and heterotic responses of exotic maize inbred lines can facilitate their use for developing aflatoxin resistant parents of hybrids in Africa. This study was designed to (1) determine the heterotic affinities of aflatoxin resistant exotic lines, (2) identify exotic inbreds with good combining ability, and (3) determine the mode of inheritance of resistance to aflatoxin contamination in these lines. A line × tester mating design was used to determine combining ability of 12 yellow and 13 white inbreds and classify them into heterotic groups. The inbreds were crossed to two adapted testers representing two African heterotic groups and the resulting testcrosses along with hybrid checks were evaluated in separate trials at two locations for 2 years in Nigeria. General combining ability (GCA) effects were more important than specific combining ability effects for aflatoxin and grain yield. Among 15 exotic inbred lines having negative GCA effects for aflatoxin and 13 with positive GCA effects for grain yield, six combined the two desired traits. Five white and six yellow endosperm testcrosses were found to be good specific combiners for the two desired traits. The exotic lines with negative GCA effects for aflatoxin accumulation will be used as donor parents to develop backcross populations for generating new inbred lines with much higher levels of resistance to aflatoxin accumulation.
dc.description.sponsorshipUnited States Department of Agriculture
dc.description.sponsorshipUnited States Agency for International Development
dc.format.extent1-15
dc.language.isoen
dc.rightsCC-BY-SA
dc.subjectCombining Ability
dc.subjectAflatoxins
dc.subjectHeterotis
dc.subjectInbred Lines
dc.titleHeterotic affinity and combining ability of exotic maize inbred lines for resistance to aflatoxin accumulation
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpAgriculture for Nutrition and Health
cg.contributor.crpMaize
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.crpGrain Legumes
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationAgricultural Research Service
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.creator.identifierSILVESTRO MESEKA: 0000-0003-1004-2450
cg.creator.identifierAlejandro Ortega-Beltran: 0000-0003-3747-8094
cg.creator.identifierRanajit Bandyopadhyay: 0000-0003-2422-4298
cg.creator.identifierAbebe Menkir: 0000-0002-5907-9177
cg.researchthemeBIOTECH & PLANT BREEDING
cg.researchthemePLANT PRODUCTION & HEALTH
cg.isijournalISI Journal
cg.authorship.typesCGIAR and advanced research institute
cg.iitasubjectAflatoxin
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalEuphytica
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid101204
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1007/s10681-018-2254-8


Files in this item

Thumbnail
Name:
U18ArtMesekaHeteroticInthomNod ...
Size:
432.0Kb
Format:
PDF
View/Open

This item appears in the following Collection(s)

Show simple item record