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dc.contributorvan Arendonk, Johanen_US
dc.contributorValle Zarate, Anneen_US
dc.contributorHaile, Aynalemen_US
dc.contributorRischkowsky, Barbaraen_US
dc.contributorDessie, Tadelleen_US
dc.contributorMwai, Ally Okeyoen_US
dc.creatorGizaw Assefa, Solomonen_US
dc.identifier.citationSolomon Gizaw Assefa, Johan van Arendonk, Anne Valle Zarate, Aynalem Haile, Barbara Rischkowsky, Tadelle Dessie, Ally Okeyo Mwai. (31/10/2014). Breeding programmes for smallholder sheep farming systems: II. Optimization of cooperative village breeding schemes. Journal of Animal Breeding and Genetics, 131 (5), pp. 350-357.en_US
dc.description.abstractA simulation study was conducted to optimize a cooperative village-based sheep breeding scheme for Menz sheep of Ethiopia. Genetic gains and profits were estimated under nine levels of farmers’ participation and three scenarios of controlled breeding achieved in the breeding programme, as well as under three cooperative flock sizes, ewe to ram mating ratios and durations of ram use for breeding. Under fully controlled breeding, that is, when there is no gene flow between participating (P) and non-participating (NP) flocks, profits ranged from Birr 36.9 at 90% of participation to Birr 21.3 at 10% of participation. However, genetic progress was not affected adversely. When there was gene flow from the NP to P flocks, profits declined from Birr 28.6 to Birr 3.7 as participation declined from 90 to 10%. Under the two-way gene flow model (i.e. when P and NP flocks are herded mixed in communal grazing areas), NP flocks benefited from the genetic gain achieved in the P flocks, but the benefits declined sharply when participation declined beyond 60%. Our results indicate that a cooperative breeding group can be established with as low as 600 breeding ewes mated at a ratio of 45 ewes to one ram, and the rams being used for breeding for a period of two years. This study showed that farmer cooperation is crucial to effect genetic improvement under smallholder low-input sheep farming systems.en_US
dc.publisherWiley: 12 monthsen_US
dc.sourceJournal of Animal Breeding and Genetics ;131,(2014) Pagination 350,357en_US
dc.subjectsmallholder systemen_US
dc.subjectcooperative breedingen_US
dc.subjectdesigning breeding programen_US
dc.titleBreeding programmes for smallholder sheep farming systems: II. Optimization of cooperative village breeding schemesen_US
dc.typeJournal Articleen_US
cg.creator.idGizaw Assefa, Solomon: 0000-0002-7489-062Xen_US
cg.creator.idvan Arendonk, Johan: 0000-0003-2592-3947en_US
cg.creator.idHaile, Aynalem: 0000-0001-5914-0487en_US
cg.creator.idRischkowsky, Barbara: 0000-0002-0035-471Xen_US
cg.creator.idDessie, Tadelle: 0000-0002-1630-0417en_US
cg.creator.idMwai, Ally Okeyo: 0000-0003-2379-7801en_US
cg.subject.agrovocfarmer participationen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerWageningen University & Research Centre - WURen_US
cg.contributor.centerUniversity of Hohenheim - UHOHen_US
cg.contributor.centerInternational Livestock Research Institute - ILRIen_US
cg.contributor.crpCGIAR Research Program on Dryland Systems - DSen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionEastern Africaen_US
dc.identifier.statusLimited accessen_US

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