Sons (n = 71 to 75) of each of six Holstein sires were genotyped at 69 microsatellite loci covering a total of 676 cM on chromosomes 3, 5, 9, 10, 13, 15, 17, 20, 23, and 26. Estimates of quantitative trait loci (QTL) effect and location were made using a least squares interval mapping approach ba...
Plante, Y.
,
Gibson, John P.
,
Nadesalingam, J.
,
Mehrabani-Yeganeh, H.
,
Lefebvre, S.
,
Vandervoort, G.
,
Jansen, G.B.
,
[Detection of quantitative trait loci affecting milk production traits on 10 chromosomes in Holstein cattle]
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Detection of quantitative trait loci affecting milk production traits on 10 chromosomes in Holstein cattle
The parasite strain specificity of CTL responses to Theileria parva varies among cattle immunized with the same parasite stock. We have investigated the influence of class I MHC on the strain specificity of CTL responses to T. parva in 19 cattle of defined class I phenotype immunized with either ...
Taracha, E.L.N.
,
Goddeeris, B.M.
,
Teale, A.J.
,
Kemp, Stephen J.
,
Morrison, W. Ivan
,
[Parasite strain specificity of bovine cytotoxic T cell responses to Theileria parva is determined primarily by immunodominance]
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Parasite strain specificity of bovine cytotoxic T cell responses to Theileria parva is determined primarily by immunodominance
Mycoplasma strains being considered as pathogenic or non-pathogenic for cattle were tested on their capacity to activate bovine alveolar macrophages in vitro. Of particular interest was the behaviour of Mycoplasma mycoides ssp. mycoides small colony type (M.m.m. SC), the causative agent of contag...
Jungi, T.W.
,
Krampe, M.
,
Sileghem, M.R.
,
Griot, C.
,
Nicolet, J.
,
[Differential and strain-specific triggering of bovine alveolar macrophage effector functions by mycoplasmas]
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Differential and strain-specific triggering of bovine alveolar macrophage effector functions by mycoplasmas
The study investigated the population structure, diversity and differentiation of almost all of the ecotypes representing the African Ankole Longhorn cattle breed on the basis of morphometric (shape and size), genotypic and spatial distance data. Twentyone morphometric measurements were used to d...
Ndumu, D.
,
Baumung, R.
,
Hanotte, Olivier H.
,
Wurzinger, Maria
,
Okeyo Mwai, Ally
,
Kibogo, H.
,
Sölkner, J.
,
Han Jianlin
,
[Genetic and morphological characterisation of the Ankole Longhorn cattle in the African Great Lakes region]
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Genetic and morphological characterisation of the Ankole Longhorn cattle in the African Great Lakes region
Assessment of genetic diversity is a prerequisite for the management and conservation of animal genetic resources. Appropriate design of breeding programmes is therefore impossible for breeds that have not been adequately characterized either phenotypically and/or genetically. Phenotypic characte...
Mwacharo, Joram M.
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Okeyo Mwai, Ally
,
Kamande, G.K.
,
Rege, J.E.O.
,
[The small East African shorthorn zebu cows in Kenya. I: linear body measurements]
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The small East African shorthorn zebu cows in Kenya. I: linear body measurements
Ankole cattle are well known for their massive white horns and red coat colour. These characteristics are attributed to centuries of cultural breeding practices. Two experiments with traditional cattle keepers were carried out at a governmental Ankole nucleus farm in south-western Uganda to ident...
Ndumu, D.B.
,
Baumung, R.
,
Wurzinger, Maria
,
Drucker, A.G.
,
Okeyo Mwai, Ally
,
Semambo, D.K.
,
Sölkner, J.
,
[Performance and fitness traits versus phenotypic appearance in the African Ankole Longhorn cattle: a novel approach to identify selection criteria for indigenous breeds]
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Performance and fitness traits versus phenotypic appearance in the African Ankole Longhorn cattle: a novel approach to identify selection criteria for indigenous breeds
Con el fin de dinamizar la ganadería colombiana, y en un esfuerzo conjunto de los sectores oficial y privado, se están adelantando procesos de investigación y transferencia de tecnología en el nivel de empresas agropecuarias. Parte de ese proceso ha sido la caracterización de los principales sist...
Duarte Torres, O.A.
,
Pulido Herrera, J
,
Silva Zalzuk, J
,
Holmann, Federico J.
,
[Modelo de optimización para los sistemas de producción agropecuarios de la microrregión Valle del Cesar, Colombia = Model to improve the livestock and crop production systems in Valle del Cesar, Colombia]
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Modelo de optimización para los sistemas de producción agropecuarios de la microrregión Valle del Cesar, Colombia = Model to improve the livestock and crop production systems in Valle del Cesar, Colombia
Jabbar, M.A.
,
Swallow, B.M.
,
D'Ieteren, G.D.M.
,
Busari, A.A.
,
[Farmer preferences and market values of cattle breeds of West and Central africa]
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Farmer preferences and market values of cattle breeds of West and Central africa
On-farm surveys and characterization of six indigenous north Ethiopian cattle breeds (Afar, Arado, Begait, Fogera, Medenes and Raya) was carried out with the objective of determining the current status of these breeds. Information from a structured questionnaire distributed to 450 farmers, 37 gro...
Zerabruk, M
,
Vangen, O.
,
Haile, M.
,
[The status of cattle genetic resources in North Ethiopi: On-farm charcterization of six major cattle breeds]
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The status of cattle genetic resources in North Ethiopi: On-farm charcterization of six major cattle breeds
Correlation between testicular size and sperm output were investigated in N'Dama and Holstein-Friesian bulls. Records collected over a period of four months from October 1978 to January 1979 from 4 Holstein-Friesian and 4 N'Dama bulls were analysed. The means (± s.e.) of testicular measurements f...
Nwakalor, L.N.
,
Orji, B.I.
,
[Testicular size and sperm output in Holstein-Friesian and N'Dama bulls]
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Testicular size and sperm output in Holstein-Friesian and N'Dama bulls