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Journal Article 1985

Autor: Trail, J.C.M. Gregory, K.E. Marples, H.J.S. Kakonge, J.

Presents results of a study conducted to estimate the effects of heterosis and breed on a series of maternal and individual traits; uses Boran X Ankole and Boran X Zebu as crossbred cows and Ankole, Boran and Small East African Zebu as straight-bred cows; includes calf crop born, preweaning viabi...

Enlace original: https://cgspace.cgiar.org/handle/10568/32979

Investigación en Agricultura
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Trail, J.C.M. ,  Gregory, K.E. ,  Marples, H.J.S. ,  Kakonge, J. ,  [Comparison of Bos taurus - Bos indicus breed crosses with straight bred Bos indicus breeds of cattle for maternal and individual traits] ,  Comparison of Bos taurus - Bos indicus breed crosses with straight bred Bos indicus breeds of cattle for maternal and individual traits
Journal Article 1985

Autor: Gregory, K.E. Trail, J.C.M. Marples, H.J.S. Kakonge, J.

Presents results of a study conducted to estimate the effects of heterosis and breed on a series of maternal and individual traits; takes Boran X Ankole and Boran X Zebu as crossbred cows and Ankole, Boran and Small East African Zebu as straightbred cows; includes traits like calf crop born, prew...

Enlace original: https://cgspace.cgiar.org/handle/10568/32982

Investigación en Agricultura
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Gregory, K.E. ,  Trail, J.C.M. ,  Marples, H.J.S. ,  Kakonge, J. ,  [Heterosis and breed effects on maternal and individual traits of Bos indicus breeds of cattle] ,  Heterosis and breed effects on maternal and individual traits of Bos indicus breeds of cattle
Journal Article 1985

Autor: Gregory, K.E. Trail, J.C.M. Marples, H.J.S. Kakonge, J.

Compares individual as well as maternal traits of different breeds of Bos indicus and Bos taurus cattle interms of cow weight at parturition, weaning and at dif. stages after parturition, calf crop, viability and weight at dif. ages.

Enlace original: https://cgspace.cgiar.org/handle/10568/32983

Investigación en Agricultura
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Gregory, K.E. ,  Trail, J.C.M. ,  Marples, H.J.S. ,  Kakonge, J. ,  [Characterization of breeds of Bos indicus and Bos taurus cattle for maternal and individual traits] ,  Characterization of breeds of Bos indicus and Bos taurus cattle for maternal and individual traits
Journal Article 1984

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

Presented data on maternal traits, i.e.Age at first calving, calving interval, calf weaning weight and cow productivity index, of pure Boran and Boran crossbred w. each of Charolais, Ayrshire and Santa Gertrudis on privately owned ranches in Machakos District, Kenya.

Enlace original: https://cgspace.cgiar.org/handle/10568/29735

Investigación en Agricultura
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Gregory, K.E. ,  Trail, J.C.M. ,  Sandford, J. ,  Durkin, J.W. ,  [Crossbreeding cattle in beef production programmes in Kenya. I. Comparison of purebred Boran and Boran crossed with the Charolais, Ayrshire and Santa Gertrudis breeds] ,  Crossbreeding cattle in beef production programmes in Kenya. I. Comparison of purebred Boran and Boran crossed with the Charolais, Ayrshire and Santa Gertrudis breeds
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
Book 1981

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

Evaluates and compares the productivity under commercial management levels of Sahiwals, Sahiwal/Ayrshire crossbreeds, indigenous Small East African Zebus and Boran, using data from 5 herds in Kenya, with particular reference to reproductive and growth characters, milk production, viability and in...

Enlace original: https://cgspace.cgiar.org/handle/10568/4224

Investigación en Agricultura
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Trail, J.C.M. ,  Gregory, K.E. ,  [Sahiwal cattle: An evaluation of their potential contribution to milk and beef production in Africa] ,  Sahiwal cattle: An evaluation of their potential contribution to milk and beef production in Africa
Journal Article 1982

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

Presents comparative data on reproductive and productive performances of cows of pure Ayrshire and Sahiwal breeds or their reciprocal crosses and their progeny w. Ayrshire, Sahiwal, Simmental and mixed breed bulls in the lower to mid-potential temperate highland zone of Kenya; with particular ref...

Enlace original: https://cgspace.cgiar.org/handle/10568/29734

Investigación en Agricultura
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Trail, J.C.M. ,  Gregory, K.E. ,  [Production characters of the Sahiwal and Ayrshire breeds and their crosses in Kenya] ,  Production characters of the Sahiwal and Ayrshire breeds and their crosses in Kenya
Journal Article 1982

Autor: Trail, J.C.M. Gregory, K.E. Marples, H.J.S. Kakonge, J.

Presents results of an experiment conducted in southwestern Uganda to estimate heterosis, additive maternal and direct effects of the Red Poll and Boran breeds of cattle involved in a two-breed diallel design. Includes data on survival and growth traits from birth to an age of 30 months.

Enlace original: https://cgspace.cgiar.org/handle/10568/32981

Investigación en Agricultura
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Trail, J.C.M. ,  Gregory, K.E. ,  Marples, H.J.S. ,  Kakonge, J. ,  [Heterosis, additive maternal and additive direct effects on the Red Poll and Boran breeds of cattle] ,  Heterosis, additive maternal and additive direct effects on the Red Poll and Boran breeds of cattle
Journal Article 1981

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

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/32978

Investigación en Agricultura
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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
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
Enlace permanente
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

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