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Onzima, R.B.Gizaw, SolomonKugonza, D.K.Arendonk, Johan A.M. vanKanis, E.[Production system and participatory identification of breeding objective traits for indigenous goat breeds of Uganda]Production system and participatory identification of breeding objective traits for indigenous goat breeds of Uganda

In 2008 a breeding program to increase production level in indigenous chickens was initiated at the Debre Zeit Agricultural Research Center in Ethiopia and is currently producing its 8th generation. Aim of this paper was to evaluate the success of the breeding program. Selection was on own perfor...


Wondmeneh, E.Waaij, E.H. van derDessie, TadelleOkeyo Mwai, AllyArendonk, Johan A.M. van[A running breeding program for indigenous chickens in Ethiopia: Evaluation of success]A running breeding program for indigenous chickens in Ethiopia: Evaluation of success

To generate information essential for the implementation of breeding schemes suitable for village poultry producers in Ethiopia, a survey was conducted aimed at defining the socioeconomic characteristics of the production environments in different geographic regions, understanding the important f...


Dana, N.Waaij, E.H. van derDessie, TadelleArendonk, Johan A.M. van[Production objectives and trait preferences of village poultry producers of Ethiopia: implications for designing breeding schemes utilizing indigenous chicken genetic resources]Production objectives and trait preferences of village poultry producers of Ethiopia: implications for designing breeding schemes utilizing indigenous chicken genetic resources

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

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

Nine mathematical models were compared for their ability to predict daily milk yields (n 294,986) in standard 305-d and extended lactations of dairy cows of Costa Rica. Lactations were classified by parity (first and later), lactation length (9 to 10, 11 to 12, 13 to 14, 15 to 16, and 16 to 17 ...


Vargas, B.Koops, W.J.Herrero, Mario T.Arendonk, Johan A.M. van[Modeling extended lactations of dairy cows]Modeling extended lactations of dairy cows

Dessie, TadelleDana, N.Esatu, W.Waaij, E.H. van derArendonk, Johan A.M. van[Improving village chicken production to elevate livelihoods of poor people in Ethiopia]Improving village chicken production to elevate livelihoods of poor people in Ethiopia

Understanding the complex origin of domesticated populations is of vital importance for understanding, preserving and exploiting breed genetic diversity. Here, we aim to assess Asian contributions to European traditional breeds and western commercial chickens for mitochondrial genetic diversity. ...


Dana, N.Megens, H.-J.Crooijmans, R.P.M.A.Hanotte, Olivier H.Mwacharo, Joram M.Groenen, M.A.M.Arendonk, Johan A.M. van[East Asian contributions to Dutch traditional and western commercial chickens inferred from mtDNA analysis]East Asian contributions to Dutch traditional and western commercial chickens inferred from mtDNA analysis

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