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Autor: Trail, J.C.M.

The limited genetic potential of indigenous cattle has often been quoted as a major constraint to beef and milk production in Africa south of the Sahara. Thus, considerable efforts have been and are being made to increase output through breeding programmes in many countries of the continent. Thes...


Trail, J.C.M.[Merits and demerits of importing exotic cattle compared with the improvement of local breeds: Cattle in Africa South of the Sahara]Merits and demerits of importing exotic cattle compared with the improvement of local breeds: Cattle in Africa South of the Sahara

Describes the main ecological zones of Africa and mentions the importance of cattle in each zone, the production systems involved and the general types of cattle that can be maintained. Determines the value of previous breed productivity research in assessing current decision making.


Trail, J.C.M.Gregory, K.E.[Animal breeding in sub-Saharan Africa: Toward an integrated program for improving productivity]Animal breeding in sub-Saharan Africa: Toward an integrated program for improving productivity

Discusses the design of breeding programmes for stressful environments. Identifies the relationship between adaptive traits and productive traits, the Development of breeding objectives and selection criteria. Includes economic objectives, heat tolerance, feed intake, disease resistance and the r...


Franklin, I.R.Trail, J.C.M.[The design of breeding programmes for stressful environments]The design of breeding programmes for stressful environments
Autor: Trail, J.C.M.

Presents the current status of animal breeding in Africa and indicates the potential for Development and implementation of breeding programs. Discusses ecological zones, breeding possibilities and productivity of cattle breeds.


Trail, J.C.M.[The potential for animal breeding in Africa]The potential for animal breeding in Africa
Autor: Trail, J.C.M.

Studies the broad groups of cattle in Africa in relation to the main ecological zones. Indicates the possibilities for bringing about changes through application of animal breeding techniques. Reviews past cattle breeding research in Africa. Summarises ILCA's work with national research organisat...


Trail, J.C.M.[Animal breeding in developing country situations in Africa]Animal breeding in developing country situations in Africa

Presents examples of collaborative studies between the International Livestock Center for Africa and national research organizations to describe some of the genetic resources available for improving milk production in sub-Saharan Africa. Describes the performance of zebu breeds indigenous to the ...


Thorpe, W.R.Trail, J.C.M.[Availability of genetic resources for milk production in developing countries, with special reference to sub-Saharan Africa]Availability of genetic resources for milk production in developing countries, with special reference to sub-Saharan Africa

Results of a study conducted in the Rift Valley Province of Kenya comparing pedigree Boran & Sahiwal cattle in order to assess their potential as beef producing animals. Analyzes records on cows & their calves for reproductive characters such as age at first calving, calving interval & growth & m...


Trail, J.C.M.Gregory, K.E.[Characterization of the Boran and Sahiwal breeds of cattle for economic characters]Characterization of the Boran and Sahiwal breeds of cattle for economic characters
Kiwuwa, G.H.Trail, J.C.M.Yousef, M.K.Worku, G.Anderson, F.M.Durkin, J.W.[Productivité de bovins laitiers métis dans la région d'Arsi en Ethiopie]Productivité de bovins laitiers métis dans la région d'Arsi en Ethiopie

Production characteristics covering female breeding data; growth of kids and use of correction factors for parity of dam, sex and type of bith of kid; dam milk production as measured by early kid growth; repeatabilities and phenotypic correlations between kid weights; and kid mortality, were exam...


Sacker, G.D.Trail, J.C.M.[Production characteristics of a herd of East African Mubende goats]Production characteristics of a herd of East African Mubende goats

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