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Evaluation of an open nucleus breeding programme for growth of the Djallonke sheep in Cote d'Ivoire

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Title Evaluation of an open nucleus breeding programme for growth of the Djallonke sheep in Cote d'Ivoire
 
Creator Yapi, C.V.
Oya, A.
Rege, J.E.O.
 
Subject ANIMAL BREEDING
SHEEP
COTE D IVOIRE
GROWTH
NUCLEUS
EVALUATION
 
Description A selection programme (PNSO) was set up in 1983 in Cote d'Ivoire to increase growth and liveweight of the indigenous Djallonke sheep, using open nucleus breeding system. Selection was based on male individual weight at 80, 180 and 365 days of age. 10,417 records on 80 day weights (WT80) of lambs born between 1984 and 1992 from 29 participating farmers were analysed. Male and single born lambs outweighed female and multiple born lambs by 0.8 and 1.7 kg, respectively. Lambs born in hot and wet season had the highest WT80 whereas cool and wet season born lambs had the lowest weights. Repeatability and heritability of WT80 were estimated at .196 and .065, respectively. Although the effect of year of birth was significant, there was an up and down trend in WT80, leading to significant negative phenotypic (-152 g/year) and environmental (-180 g/year) trends. Estimated breeding value for WT80 increased, on average, by 28 g/year during the study period.
 
Date 2016-02-08T09:03:19Z
2016-02-08T09:03:19Z
1994
 
Type Conference Paper
 
Identifier 088955-366-1
http://hdl.handle.net/10568/70851
 
Language en