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Journal Article 1971

Autor: Trail, J.C.M. Sacker, G.D. Fisher, I.L.

Three dam breeds, the indigenous Ankole and zebu, and the Boran from Kenya were mated to Boran Angus and Red Poll sires to investigate the relationship between dam body weight and progeny performance. Under artificial insemination, at least 10% fewer cows were detected on heat than under natural ...

Enlace original: https://cgspace.cgiar.org/handle/10568/66845

Investigación en Agricultura
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Trail, J.C.M. ,  Sacker, G.D. ,  Fisher, I.L. ,  [Crossbreeding beef cattle in western Uganda. 1. Performance of Ankole, Boran and zebu cows] ,  Crossbreeding beef cattle in western Uganda. 1. Performance of Ankole, Boran and zebu cows
Journal Article 1966

Autor: Trail, J.C.M. Sacker, G.D.

Dorset Horn rams were used on East African Blackhead sheep in western Uganda in mutton production through improved lamb growth. The crossbred lambs were significantly heavier than the indigenous at birth. From birth to weaning at five months, the growth rates of both types were identical, being 0...

Enlace original: https://cgspace.cgiar.org/handle/10568/66830

Investigación en Agricultura
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Trail, J.C.M. ,  Sacker, G.D. ,  [Production records of lambs from East African Blackhead ewes and Dorset Horn rams] ,  Production records of lambs from East African Blackhead ewes and Dorset Horn rams
Journal Article 1986

Autor: Carew, S.F. Sandford, J. Wissocq, Y.J. Durkin, J.W. Trail, J.C.M.

Examines the productivities of N'Dama cattle, introduced Sahiwal cattle, and Sahiwal X N'Dama crossbred at the Teko Livestock Station, Sierra Leone. Evaluates environmental and genetic effects relating to breed group, month and year of parturition or birth, age, sex, individual cow etc. as approp...

Enlace original: https://cgspace.cgiar.org/handle/10568/10876

Investigación en Agricultura
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Carew, S.F. ,  Sandford, J. ,  Wissocq, Y.J. ,  Durkin, J.W. ,  Trail, J.C.M. ,  [Productivite de bovins N'Dama a la station de Teko (Sierra Leone) et premiers resultats de croisements avec la race Sahiwal] ,  Productivite de bovins N'Dama a la station de Teko (Sierra Leone) et premiers resultats de croisements avec la race Sahiwal
Report 1984

Autor: Trail, J.C.M. Gregory, K.E.

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.

Enlace original: https://cgspace.cgiar.org/handle/10568/50158

Investigación en Agricultura
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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
Journal Article 1977

Autor: Trail, J.C.M. Buck, N.G. Light, D.E. Rennie, T.W. Rutherford, A.S. Miller, M. Pratchett, D. Capper, B.

Evaluation of reproductive performance, viability and growth of Afrikander, Tswana, Tuli and crossbred beef cattle in Botswana; data on calving percentage, calf mortality, weaning & birth weights, w. comparison of crossbreeding performance of Tuli, Bonsmara cattle, Brahman cattle & Simmental catt...

Enlace original: https://cgspace.cgiar.org/handle/10568/28257

Investigación en Agricultura
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Trail, J.C.M. ,  Buck, N.G. ,  Light, D.E. ,  Rennie, T.W. ,  Rutherford, A.S. ,  Miller, M. ,  Pratchett, D. ,  Capper, B. ,  [Productivity of Africander, Tswana, Tuli and crossbred beef cattle in Botswana] ,  Productivity of Africander, Tswana, Tuli and crossbred beef cattle in Botswana
Conference Paper 1985

Autor: Franklin, I.R. Trail, J.C.M.

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/51141

Investigación en Agricultura
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Franklin, I.R. ,  Trail, J.C.M. ,  [The design of breeding programmes for stressful environments] ,  The design of breeding programmes for stressful environments
Conference Paper 1988

Autor: Thorpe, W.R. Trail, J.C.M.

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 ...

Enlace original: https://cgspace.cgiar.org/handle/10568/50214

Investigación en Agricultura
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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
Book Chapter 1984

Autor: Trail, J.C.M.

Presents findings of trials carried out in Uganda to characterize the indigenous Ankole, Boran and zebu cattle breeds as straightbreds for maternal traits and in crosses with exotic Angus and Red Poll males; includes data on calf crop, preweaning viability and calf weight at birth, weaning and at...

Enlace original: https://cgspace.cgiar.org/handle/10568/50333

Investigación en Agricultura
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Trail, J.C.M. ,  [Crossbreeding indigenous East African cattle with American Angus and Red Poll] ,  Crossbreeding indigenous East African cattle with American Angus and Red Poll
Journal Article 1984

Autor: Trail, J.C.M. Gregory, K.E. Durkin, J.W. Sandford, J.

Compares two series of breed groups of cows for maternal traits from a three-year study in Kenya to identify breed crosses that are superior to the Boran purebreds; considers age at first calving, calving interval, calf weight at weaning, cow weight at weaning, calf mortality to weaning and cow p...

Enlace original: https://cgspace.cgiar.org/handle/10568/29771

Investigación en Agricultura
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Trail, J.C.M. ,  Gregory, K.E. ,  Durkin, J.W. ,  Sandford, J. ,  [Crossbreeding cattle in beef production programmes in Kenya. II. Comparison of purebred Boran and Boran crossed with the Red Poll and Santa Gertrudis breeds] ,  Crossbreeding cattle in beef production programmes in Kenya. II. Comparison of purebred Boran and Boran crossed with the Red Poll and Santa Gertrudis breeds
Journal Article 1986

Autor: Carew, S.F. Sandford, J. Wissocq, Y.J. Durkin, J.W. Trail, J.C.M.

Examines the productivities of N'Dama cattle, introduced Sahiwal cattle, and Sahiwal X N'Dama crossbred at the Teko Livestock Station, Sierra Leone. Evaluates environmental and genetic effects relating to breed group, month and year of parturition or birth, age, sex, individual cow etc. as approp...

Enlace original: https://cgspace.cgiar.org/handle/10568/4512

Investigación en Agricultura
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Carew, S.F. ,  Sandford, J. ,  Wissocq, Y.J. ,  Durkin, J.W. ,  Trail, J.C.M. ,  [N'dama cattle productivity at Teko Livestock Station, Sierra Leone, and initial results from cross-breeding with Sahiwal] ,  N'dama cattle productivity at Teko Livestock Station, Sierra Leone, and initial results from cross-breeding with Sahiwal

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