A selective breeding program was implemented to improve the performance of indigenous chickens. Improved chicken from the 7th generation were compared with commercial layer, crossbred and unselected indigenous chickens both on-station and on-farm. A total of 870 chickens were used. More than 600 ...
Wondmeneh, E.
,
Waaij, Liesbeth van der
,
Udo, H.M.J.
,
Dessie, Tadelle
,
Arendonk, Johan A.M. van
,
[Comparison of different poultry breeds under station and on-farm conditions in Ethiopia]
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Comparison of different poultry breeds under station and on-farm conditions in Ethiopia
Economic values for production traits (carrier, fat, protein, and dressing percentage) and functional traits (conception rate, survival rate, body weight, and rumen capacity) were calculated for Holstein cattle of Costa Rica. Economic values were derived using a bio-economic model that combined g...
Vargas, B.
,
Groen, A.F.
,
Herrero, Mario T.
,
Arendonk, Johan A.M. van
,
[Economic values for production and functional traits in Holstein cattle of Costa Rica]
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Economic values for production and functional traits in Holstein cattle of Costa Rica
Breeding objectives were developed for meat sheep in smallholder production circumstances in the tropics. The traits considered were litter size, lambing frequency, pre-weaning, and post-weaning lamb survival to 12 months, ewe survival, lamb live weight at 12-month, mature ewe live weight, consum...
Kosgey, I.S.
,
Arendonk, Johan A.M. van
,
Baker, R.L.
,
[Economic values for traits of meat sheep in medium to high production potential areas of the tropics]
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Economic values for traits of meat sheep in medium to high production potential areas of the tropics
A dynamic performance model was integrated with a model that optimised culling and insemination policies in dairy herds using dynamic programming. The performance model estimated daily feed intake, milk yield and body weight change of
dairy cows on the basis of availability and quality of feed an...
Vargas, B.
,
Herrero, Mario T.
,
Arendonk, Johan A.M. van
,
[Interactions between optimal replacement policies and feeding strategies in dairy herds]
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Interactions between optimal replacement policies and feeding strategies in dairy herds
Arendonk, Johan A.M. van
,
[Long term genetic gains implementation plan for the African Chicken Genetic Gains program]
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Long term genetic gains implementation plan for the African Chicken Genetic Gains program
A dynamic performance model was integrated with a model that optimised culling and insemination policies in dairy herds using dynamic programming. The performance model estimated daily feed intake, milk yield and body weight change of dairy cows on the basis of availability and quality of feed an...
Vargas, B.
,
Herrero, Mario T.
,
Arendonk, Johan A.M. van
,
[Interactions between optimal culling and insemination policies and feeding strategies in dairy herds]
,
Interactions between optimal culling and insemination policies and feeding strategies in dairy herds
A marker-assisted introgression (MAI) experiment was conducted to use genetic markers to transfer each of the three trypanotolerance QTL from a donor mouse strain, C57BL/6, into a recipient mouse strain, A/J. We used a backcross strategy that consisted of selecting two lines, each carrying two of...
Koudande, O.D.
,
Arendonk, Johan A.M. van
,
Iraqi, F.A.
,
[Marker-assisted introgression of trypanotolerance QTL in mice]
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Marker-assisted introgression of trypanotolerance QTL in mice
Kosgey, I.S.
,
Werf, J.H.J. van der
,
Kinghorn, B.P.
,
Arendonk, Johan A.M. van
,
Baker, R.L.
,
[Theoretical assessment of alternative pure-breeding schemes for sheep meat in the tropics]
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Theoretical assessment of alternative pure-breeding schemes for sheep meat in the tropics
Kosgey, I.S.
,
Arendonk, Johan A.M. van
,
Baker, R.L.
,
[Breeding objectives for meat sheep in smallholder production systems in the tropics]
,
Breeding objectives for meat sheep in smallholder production systems in the tropics
Onzima, R.B.
,
Gizaw, Solomon
,
Kugonza, D.K.
,
Arendonk, Johan A.M. van
,
Kanis, E.
,
[Production system and participatory identification of breeding objective traits for indigenous goat breeds of Uganda]
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Production system and participatory identification of breeding objective traits for indigenous goat breeds of Uganda