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Gizaw, SolomonTegegne, Azage[Bio-economic and operational feasibility of introducing oestrus synchronization and artificial insemination in simulated smallholder sheep breeding programmes]Bio-economic and operational feasibility of introducing oestrus synchronization and artificial insemination in simulated smallholder sheep breeding programmes

A 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...


Gizaw, SolomonArendonk, Johan A.M. vanValle-Zárate, A.Haile, AynalemRischkowsky, Barbara A.Dessie, TadelleOkeyo Mwai, Ally[Breeding programmes for smallholder sheep farming systems: II. Optimization of cooperative village breeding schemes]Breeding programmes for smallholder sheep farming systems: II. Optimization of cooperative village breeding schemes

Survival analysis applying proportional hazards models was used to investigate genetic and non-genetic factors affecting ewe longevity and lamb survival of sheep in Ethiopia. Data were obtained from an on-station closed nucleus breeding program of Menz sheep and an on-farm Awassi×Menz sheep cross...


Getachew, T.Gizaw, SolomonWurzinger, MariaHaile, AynalemRischkowsky, Barbara A.Okeyo Mwai, AllySölkner, J.Meszaros, G.[Survival analysis of genetic and non-genetic factors influencing ewe longevity and lamb survival of Ethiopian sheep breeds]Survival analysis of genetic and non-genetic factors influencing ewe longevity and lamb survival of Ethiopian sheep breeds

Pedigree recording and genetic selection in village flocks of smallholder farmers have been deemed infeasible by researchers and development workers. This is mainly due to the difficulty of sire identification under uncontrolled village breeding practices. A cooperative village sheep-breeding sch...


Gizaw, SolomonGoshme, S.Getachew, T.Haile, AynalemRischkowsky, Barbara A.Arendonk, Johan A.M. vanValle-Zárate, A.Dessie, TadelleOkeyo Mwai, Ally[Feasibility of pedigree recording and genetic selection in village sheep flocks of smallholder farmers]Feasibility of pedigree recording and genetic selection in village sheep flocks of smallholder farmers

Village- and central nucleus-based schemes were simulated and evaluated for their relative bio-economic efficiencies, using Ethiopia's Menz sheep as example. The schemes were: village-based 2-tier (Scheme-1) and 1-tier (Scheme-2) cooperative village breeding schemes, dispersed village-based nucle...


Gizaw, SolomonRischkowsky, Barbara A.Valle-Zárate, A.Haile, AynalemArendonk, Johan A.M. vanOkeyo Mwai, AllyDessie, Tadelle[Breeding programs for smallholder sheep farming systems: I. Evaluation of alternative designs of breeding schemes]Breeding programs for smallholder sheep farming systems: I. Evaluation of alternative designs of breeding schemes

We evaluated the efficiency of selection for body weight in a cooperative village breeding program for Menz sheep of Ethiopia under smallholder farming system. The design of the program involved organizing villagers in a cooperative breeding group to implement selective breeding of their sheep. T...


Gizaw, SolomonGetachew, T.Goshme, S.Valle-Zárate, A.Arendonk, Johan A.M. vanKemp, Stephen J.Okeyo Mwai, AllyDessie, Tadelle[Efficiency of selection for body weight in a cooperative village breeding program of Menz sheep under smallholder farming system]Efficiency of selection for body weight in a cooperative village breeding program of Menz sheep under smallholder farming system

Gizaw, SolomonTesfay, Y.Mekasha, YosephMekuriaw, Z.Gugsa, T.Ebro, A.Gebremedhin, BerhanuHoekstra, DirkTegegne, Azage[Hormonal oestrus synchronization in four sheep breeds in Ethiopia: Impacts on genetic improvement and flock productivity]Hormonal oestrus synchronization in four sheep breeds in Ethiopia: Impacts on genetic improvement and flock productivity

Haile, AynalemMwacharo, Joram M.Rekik, MouradWamatu, JaneGizaw, SolomonTesfahun, G.[SmaRT Ethiopia achievements]SmaRT Ethiopia achievements

A comprehensive dynamic simulation model was developed to describe a community-based breeding program for the Menz sheep population of Ethiopia. Selection of male and female animals based on their own and maternal performance was simulated. The breeding goal traits were 6-mo weight, preweaning su...


Gebre, K.T.Wurzinger, MariaGizaw, SolomonHaile, AynalemRischkowsky, Barbara A.Getachew, T.Sölkner, J.[System dynamics modeling in designing breeding schemes: The case of Menz sheep in Ethiopian highlands]System dynamics modeling in designing breeding schemes: The case of Menz sheep in Ethiopian highlands

Sheep in the cool highlands of central-northern Ethiopia (Menz) are of the meat type, have coarse wool, and are often perceived to be low in productivity. To increase their productivity, they have been upgraded with Awassi sheep. The aim of this study was to compare the performance of 37.5% Awass...


Hassen, YSölkner, J.Gizaw, SolomonBaumung, R.[Performance of crossbred and indigenous sheep under village conditions in the cool highlands of central-northern Ethiopia: growth, birth and body weights]Performance of crossbred and indigenous sheep under village conditions in the cool highlands of central-northern Ethiopia: growth, birth and body weights

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