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Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines

dc.contributor.authorWende, A.
dc.contributor.authorShimelis, H.
dc.contributor.authorGwata, E.T.
dc.date.accessioned2019-12-04T11:21:02Z
dc.date.available2019-12-04T11:21:02Z
dc.date.issued2018
dc.identifier.citationWende, A., Shimelis, H. & Gwata, E.T. (2018). Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines. In M.A. El-Esawi, Maize germplasm-characterization and genetic approaches for crop improvement. London, UK: IntechOpen Limited, (p. 39-56).
dc.identifier.isbn978-1-78923-039-0
dc.identifier.urihttps://hdl.handle.net/20.500.12478/3638
dc.description.abstractMaize (Zea mays L.) is an important staple food crop in sub-Saharan Africa (SSA). The productivity of the crop is limited partly by the leaf blight disease caused by Exserohilum turcicum. In breeding for resistance to leaf blight, the germplasm needs to be well-characterized in order to design efficient breeding programs. This study evaluated the (i) genetic variability among maize inbred lines and (ii) diversity of selected medium to late maturity tropical maize inbred lines for hybrid breeding. Plants of 50 maize inbred lines were artificially inoculated in the field during 2011 and 2012. Disease severity and incidence as well as grain yield were measured. A subset of 20 elite maize inbred lines was genotyped using 20 SSR markers. The germplasm showed significant differences in reaction to leaf blight and were classified as either resistant or intermediate or susceptible. Mean disease severity varied from 2.04 to 3.25. Seven inbred lines were identified as potential sources of resistance to leaf blight for the genetic improvement of maize. The genotyping detected 108 alleles and grouped the inbred lines into five clusters consistent with their pedigrees. The genetic grouping in the source population will be useful in the exploitation of tropical maize breeding programs.
dc.format.extent39-56
dc.language.isoen
dc.publisherIntechOpen Limited
dc.subjectInbred Line
dc.subjectMaize
dc.subjectPedigree
dc.subjectLeaf Blight
dc.subjectGenetic Variability
dc.subjectResistance
dc.subjectGermplasm
dc.titleGenetic variability for resistance to leaf blight and diversity among selected maize inbred lines
dc.typeBook Chapter
dc.description.versionPeer Review
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of KwaZulu-Natal
cg.contributor.affiliationUniversity of Venda, South Africa
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryEthiopia
cg.creator.identifierWende Mengesha: 0000-0002-2239-7323
cg.researchthemeBIOTECH & PLANT BREEDING
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.howpublishedFormally Published
cg.publicationplaceLondon, UK
cg.accessibilitystatusOpen Access
local.dspaceid95717
cg.targetaudienceScientists
cg.identifier.doihttp://dx.doi.org/10.5772/intechopen.70553


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