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Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian in central Ethiopia: reproductive traits

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Title Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian in central Ethiopia: reproductive traits
 
Creator Haile, Aynalem
Joshi, B.K.
Ayalew, W.
Tegegne, Azage
Singh, A.
 
Subject CATTLE
GENETICS
 
Description Breed additive and non-additive effects as well as genetic parameters for calving interval (CI), days open (DO), age at first service (AFS), age at first calving (AFC), number of services per first conception (NSC) and breeding efficiency (BE) were estimated in Ethiopian Boran cattle and their crosses with Holstein Friesian in central Ethiopia. The data analysed were spread over 15 years (1990–2004). The Ethiopian Boran cattle had longer CI and DO, lower BE and delayed AFS and AFC compared with all the crosses. However, there was no significant difference in NSC between the genetic groups. Comparison between the crosses revealed no clear cut superiority of any of the genetic groups except for CI and DO which were shorter for 0·50 and 0·875 crosses compared with the 0·75 crosses. The additive breed differences between Ethiopian Boran and Holstein Friesian for CI, DO, NSC and BE were not significant (P>0·05). These estimates are also associated with large standard errors. The non-significance of the otherwise large difference (40 days for CI for instance) between the two breeds could be a result of a large variation (and hence standard errors) associated with the traits. On the other hand, the estimates for additive direct effects for AFS and AFC were negative and significant (P0·05) for CI, DO, NSC and BE. However, significant (P
 
Date 2010-08-02T13:22:03Z
2010-08-02T13:22:03Z
2009-02-15
 
Type Journal Article
 
Identifier Haile, A.; Joshi, B.K.; Ayalew, W.; Tegegne, A.; Singh, A. 2009. Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian in central Ethiopia: reproductive traits. The Journal of Agricultural Science 147:81-89.
0021-8596
https://hdl.handle.net/10568/2114
 
Language en
 
Source Journal of Agricultural Science