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Inheritance of resistance to Cercospora leaf spot disease of cowpea [Vigna unguiculata (L.) Walp]

dc.contributor.authorOmoigui, L.
dc.contributor.authorArrey, M.O.
dc.contributor.authorKamara, A.
dc.contributor.authorDanmaigona, C.C.
dc.contributor.authorEkeruo, G.
dc.contributor.authorTimko, M.P.
dc.date.accessioned2019-12-04T11:33:49Z
dc.date.available2019-12-04T11:33:49Z
dc.date.issued2019-05-03
dc.identifier.citationOmoigui, L., Arrey, M.O., Danmaigona, C.C., Ekeruo, G. & Timko, M.P. (2019). Inheritance of resistance to Cercospora leaf spot disease of cowpea [Vigna unguiculata (L.) Walp]. Euphytica, 215(5): 101, 1-12.
dc.identifier.issn0014-2336
dc.identifier.urihttps://hdl.handle.net/20.500.12478/5819
dc.descriptionOpen Access Article
dc.description.abstractCercospora leaf spot (CLS) caused by Pseudocercospora cruenta (Sacc.) is an important disease affecting cowpea production in Nigeria. Understanding the genetic nature of CLS is an important step in developing an effective breeding strategy. This study investigated the inheritance of CLS disease in cowpea under natural epiphytotic field condition involving two CLS resistant parents (IT99K-573-1-1, IT99K216-24) and a CLS susceptible parent (UAM09-1055-6). The parental lines, F1, BC1P1, BC1P2, F2 and F3 generations were used to study the genetic nature and to detect SSR markers closely linked with the CLS resistance gene(s) using bulked segregant analysis (BSA). The result showed that F1 populations involving UAM09-1055-6 × IT99K-573-1-1 and UAM09-1055-6 × IT99K-216-24 were resistant to CLS in the 2 crosses suggesting the presence of gene dominance in the control of the disease. The observed segregating ratio of F2 populations fits the Mendalian ratio 3:1. The plants reaction to the disease in the backcross progeny test involving the resistant parent were all uniformly resistant, whereas those involving the susceptible parent segregated into ratio 1:1. The F3 generations, which segregated into ratio 1:2:1 further confirmed that resistance was controlled by a single dominant gene in the crosses studied. Heritability estimates varied from 81 to 97%. BSA showed that SSR marker code named RB24 of lima bean and validated on F2 population discriminated between resistance and susceptibility to CLS. Hence RB24 could be a useful marker for marker-assisted selection in CLS resistance breeding in cowpea.
dc.description.sponsorshipKirkhouse Trust
dc.format.extent1-12
dc.language.isoen
dc.rightsCC-BY-4.0
dc.subjectCowpeas
dc.subjectCercospora
dc.subjectLeaf Spots
dc.subjectDisease Resistance
dc.subjectSsrna Viruses
dc.titleInheritance of resistance to Cercospora leaf spot disease of cowpea [Vigna unguiculata (L.) Walp]
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpGrain Legumes
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Agriculture, Makurdi
cg.contributor.affiliationUniversity of Virginia
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.creator.identifierLucky Omoigui: 0000-0001-8473-2775
cg.creator.identifierAlpha Kamara: 0000-0002-1844-2574
cg.researchthemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.journalEuphytica
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid105272
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1007/s10681-019-2420-7


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