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Body size and testicular traits of tropically-adapted bucks raised under extensive husbandry in Ethiopia
Swedish University of Agriculture Science, Sweden Alemaya University, Ethiopia .
ILRI, Ethiopia .
Department Livestock Resources Dev, Ethiopia .
Swedish University of Agriculture Science, Sweden .ORCID iD: 0000-0002-5194-2124
2008 (English)In: Reproduction in domestic animals, ISSN 0936-6768, E-ISSN 1439-0531, Vol. 43, no 2, 196-206 p.Article in journal (Refereed) Published
Abstract [en]

Five tropically adapted buck breeds extensively managed in Ethiopia were studied to determine possible effects of breed and age on body size and testicular traits. In all, 177 bucks were selected following stratified random sampling, and evaluated in three age groups: less than 14 months (young), 14-19.5 months (intermediate) and 19.6-24 months (old). The breeds studied were Arsi-Bale (AB; N = 35), Central Highlands (CH; N = 33), Afar (N = 35), Boran (N = 36) and Woito-Guji (WG; N = 38). In all the three age groups, Boran and CH bucks were the heaviest (p less than 0.05), Afar were the lightest, and AB and WG were in between. The highest body weight (BW) was achieved in the intermediate age group for Afar, but in the oldest age group for the other breeds. In the youngest age group, scrotal circumference (SC) was the widest (p less than 0.05) for Boran and CH and the narrowest for Afar, AB and WG, while in the intermediate and the oldest age groups, Boran showed the widest SC. Boran, WG and CH had higher (p less than 0.05) testicular weight (TW) than Afar and AB in the youngest age group. Boran retained the highest (p less than 0.05) TW in the intermediate and the oldest age groups, while in the oldest age group WG and AB medium TW and Afar had the lowest TW. However, Afar had the highest TW expressed as percentage of BW. SC was well correlated with TW (p less than 0.001; r = 0.74) and BW (p less than 0.001; r = 0.61), indicating a linear, positive association between BW and TW (p less than 0.001; r = 0.51). In conclusion, body size and testicular traits of Ethiopian bucks under an extensive management system are influenced differently by breed and age group.

Place, publisher, year, edition, pages
Wiley-Blackwell , 2008. Vol. 43, no 2, 196-206 p.
National Category
Engineering and Technology
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URN: urn:nbn:se:liu:diva-101763DOI: 10.1111/j.1439-0531.2007.00877.xISI: 000254627200012OAI: oai:DiVA.org:liu-101763DiVA: diva2:666678
Available from: 2013-11-23 Created: 2013-11-22 Last updated: 2017-12-06

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Rodriguez-Martinez, Heriberto

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