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dc.contributor.authorZonabend König, Emelie
dc.contributor.authorStrandberg, E.
dc.contributor.authorOjango, Julie M.K.
dc.contributor.authorMirkena, T
dc.contributor.authorOkeyo Mwai, Ally
dc.contributor.authorPhilipsson, J.
dc.date.accessioned2018-01-03T16:36:26Z
dc.date.available2018-01-03T16:36:26Z
dc.date.issued2017-12-15
dc.identifier.citationZonabend Konig, E., Strandberg, E., Ojango, J.M.K., Mirkena, T., Okeya, A.M. and Philipsson, J. 2017. Purebreeding of Red Maasai and crossbreeding with Dorper sheep in different environments in Kenya. Journal of Animal Breeding and Genetics 134(6):531–544.en_US
dc.identifier.issn1439-0388
dc.identifier.urihttp://hdl.handle.net/10568/89912
dc.description.abstractThe aim of this article was to study opportunities for improvement of the indigenous and threatened Red Maasai sheep (RM) in Kenya, by comparing purebreeding with crossbreeding with Dorper sheep (D) as a terminal breed, in two different environments (Env. A and a harsher Env. B), assuming different levels of genotype-by-environment interaction (G × E). Breeding goals differed between environments and breeds. Four scenarios of nucleus breeding schemes were stochastically simulated, with the nucleus in Env. A. Overall, results showed an increase in carcass weight produced per ewe by more than 10% over 15 years. Genetic gain in carcass weight was 0.17 genetic SD/year (0.2 kg/year) across scenarios for RM in the less harsh Env. A. For survival and milk yield, the gain was lower (0.04–0.05 genetic SD/year). With stronger G × E, the gain in the commercial tier for RM in the harsher Env. B became increasingly lower. Selection of females also within the commercial tier gave slightly higher genetic gain. The scenario with purebreeding of RM and a subnucleus in Env. B gave the highest total income and quantity of meat. However, quantity of meat in Env. A increased slightly from having crossbreeding with D, whereas that in Env. B decreased. A simple and well-designed nucleus breeding programme would increase the genetic potential of RM. Crossbreeding of RM with D is not recommended for harsh environmental conditions due to the large breed differences expected in that environment.en_US
dc.language.isoenen_US
dc.sourceJournal of Animal Breeding and Geneticsen_US
dc.subjectSHEEPen_US
dc.subjectANIMAL BREEDINGen_US
dc.subjectSMALL RUMINANTSen_US
dc.titlePurebreeding of Red Maasai and crossbreeding with Dorper sheep in different environments in Kenyaen_US
dc.description.versionPeer Reviewen_US
dc.typeJournal Articleen_US
cg.authorship.typesCGIAR and developing country instituteen_US
cg.authorship.typesCGIAR and advanced research instituteen_US
cg.subject.ilriANIMAL BREEDINGen_US
cg.subject.ilriENVIRONMENTen_US
cg.subject.ilriGENETICSen_US
cg.subject.ilriLIVESTOCKen_US
cg.subject.ilriSHEEPen_US
cg.subject.ilriSMALL RUMINANTSen_US
cg.identifier.statusOpen Accessen_US
cg.contributor.affiliationSwedish University of Agricultural Sciencesen_US
cg.contributor.affiliationInternational Livestock Research Instituteen_US
cg.contributor.affiliationHawassa Universityen_US
cg.targetaudienceSCIENTISTSen_US
cg.fulltextstatusFormally Publisheden_US
cg.identifier.doihttps://dx.doi.org/10.1111/jbg.12260en_US
cg.isijournalISI Journalen_US
cg.coverage.regionAFRICAen_US
cg.coverage.regionEAST AFRICAen_US
cg.coverage.countryKENYAen_US
cg.contributor.crpLivestocken_US
cg.creator.idOjango J.M.K.: 0000-0003-0224-5370


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