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Journal Article 2001

Autor: Abegaz, S. Negussie, E. Duguma, G. Rege, J.E.O.

Variance components and genetic parameters were estimated for growth traits: birth weight (BWT), weaning weight (WWT), six-month weight (6MWT) and yearling weight (YWT) in indigenous Ethiopian Horro lambs using the Average Information REML (AIREML). Four different models: Sire model (Model 1),...

Enlace original: https://cgspace.cgiar.org/handle/10568/66834

Investigación en Agricultura
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Abegaz, S. ,  Negussie, E. ,  Duguma, G. ,  Rege, J.E.O. ,  [Variance components and estimates of genetic parameters for early growth traits in Horro sheep] ,  Variance components and estimates of genetic parameters for early growth traits in Horro sheep
Journal Article 2002

Autor: Abegaz, S. Duguma, G. Negussie, E. Gelmesa, U. Terefe, F. Rege, J.E.O.

Conception, lambing rate and litter size were studied on data from a flock of Horro sheep in Ethiopia from 1878 to 1997. The CATMOD and GLM procedures of SAS were used for the analysis of these traits. A sire, direct additive genetic and a repeatability animal model were employed to obtain estim...

Enlace original: https://cgspace.cgiar.org/handle/10568/32967

Investigación en Agricultura
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Abegaz, S. ,  Duguma, G. ,  Negussie, E. ,  Gelmesa, U. ,  Terefe, F. ,  Rege, J.E.O. ,  [Factors affecting reproductive performance and estimates of genetic parameters of litter size in Horro sheep] ,  Factors affecting reproductive performance and estimates of genetic parameters of litter size in Horro sheep
Journal Article 2002

Autor: Abegaz, S. Negussie, E. Duguma, G. Rege, J.E.O.

Variance components and genetic parameters were estimated for growth traits: birth weight (BWT), weaning weight (WWT), 6-month weight (6MWT) and yearling weight (YWT) in indigenous Ethiopian Horro sheep using the average information REML (AIREML). Four different models: sire model (Model 1), dire...

Enlace original: https://cgspace.cgiar.org/handle/10568/32974

Investigación en Agricultura
Enlace permanente
Abegaz, S. ,  Negussie, E. ,  Duguma, G. ,  Rege, J.E.O. ,  [Genetic parameter estimates for growth traits in Horro sheep] ,  Genetic parameter estimates for growth traits in Horro sheep
Journal Article 2006

Autor: Ermias, E. Yami, A. Rege, J.E.O.

Data from 454 Menz and Horro male sheep at Debre Berhan Research Station, Ethiopia, were evaluated for slaughter characteristics. Rams were born from October 1992 to July 1996 and reared together from birth to slaughter at about 17 months of age. Pre-slaughter live weight (PSW) was about 25 kg, w...

Enlace original: https://cgspace.cgiar.org/handle/10568/33180

Investigación en Agricultura
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Ermias, E. ,  Yami, A. ,  Rege, J.E.O. ,  [Slaughter characteristics of Menz and Horro sheep] ,  Slaughter characteristics of Menz and Horro sheep
Journal Article 1997

Autor: Togashi, K. Rege, J.E.O.

A mixed model simultaneous procedure is described to estimate location parameters for the right-censored and uncensored traits in the practical animal breeding data set for herd-life and milk production. Location parameters of fixed effects represented by herd -year effects and random effects rep...

Enlace original: https://cgspace.cgiar.org/handle/10568/28814

Investigación en Agricultura
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Togashi, K. ,  Rege, J.E.O. ,  [An iterative procedure for analyzing a combination of censored and uncensored traits in mixed models: Estimation of location parameters] ,  An iterative procedure for analyzing a combination of censored and uncensored traits in mixed models: Estimation of location parameters
Journal Article 1997

Autor: Togashi, K. Rege, J.E.O.

A method for estimating variance and covariance components for both uncensored and censored traits is described. The paper considers two cases: An uncensored trait and a right-censored trait; and two uncensored traits. A multivariate normal distribution is assumed for these traits and Bayesian ar...

Enlace original: https://cgspace.cgiar.org/handle/10568/28813

Investigación en Agricultura
Enlace permanente
Togashi, K. ,  Rege, J.E.O. ,  [Maximum likelihood and an approximate expectation and maximization procedures to estimate dispersion parameters in a data set of combination of censored and uncensored traits] ,  Maximum likelihood and an approximate expectation and maximization procedures to estimate dispersion parameters in a data set of combination of censored and uncensored traits
Journal Article 2000

Autor: Toe, F. Rege, J.E.O. Mukasa-Mugerwa, E. Tembely, S. Anindo, D.O. Baker, R.L. Lahlou-Kassi, A.

A study was conducted to estimate heritabilities of, and genetic correlations among, body weight (WT) and testicular measurements - scrotal circumference (SC), testicular diameter (TD), testicular length (TL) and epididymal diameter (ED - in ram lambs between 6, 9 and 12 months old, and relations...

Enlace original: https://cgspace.cgiar.org/handle/10568/29609

Investigación en Agricultura
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Toe, F. ,  Rege, J.E.O. ,  Mukasa-Mugerwa, E. ,  Tembely, S. ,  Anindo, D.O. ,  Baker, R.L. ,  Lahlou-Kassi, A. ,  [Reproductive characteristics of Ethiopian highland sheeI. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs] ,  Reproductive characteristics of Ethiopian highland sheeI. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs
Journal Article 2000

Autor: Rege, J.E.O. Toe, F. Mukasa-Mugerwa, E. Tembely, S. Anindo, D.O. Baker, R.L. Lahlou-Kassi, A.

A study was conducted to investigate the effect of season on, and to estimate heritabilities of, and genetic correlations among, semen and spermatozoa characteristics and the relationship of these characteristics with measures of testicular or scrotal size in 6-, 9- and 12-month old ram lambs of ...

Enlace original: https://cgspace.cgiar.org/handle/10568/29624

Investigación en Agricultura
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Rege, J.E.O. ,  Toe, F. ,  Mukasa-Mugerwa, E. ,  Tembely, S. ,  Anindo, D.O. ,  Baker, R.L. ,  Lahlou-Kassi, A. ,  [Reproductive characteristics of Ethiopian highland sheep. II. Genetic parameters of semen characteristics and their relationships with testicular measurements in ram lambs] ,  Reproductive characteristics of Ethiopian highland sheep. II. Genetic parameters of semen characteristics and their relationships with testicular measurements in ram lambs
Conference Paper 1991

Autor: Rege, J.E.O. Wakhungu, Judi W. Lamole, M.A.

Estimates genetic parameters and trends in reproductive and productive traits of Sahiwal cattle - milk yield, birth weight of calves, service period, number of services per conception and calving interval, from records covering the period 1964 through 1988 obtained from the Kenya Sahiwal Stud, Na...

Enlace original: https://cgspace.cgiar.org/handle/10568/50592

Investigación en Agricultura
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Rege, J.E.O. ,  Wakhungu, Judi W. ,  Lamole, M.A. ,  [Genetic parameters and trends in production and reproduction traits at the Kenya Sahiwal Stud] ,  Genetic parameters and trends in production and reproduction traits at the Kenya Sahiwal Stud
Conference Paper 1998

Autor: Okeyo Mwai, Ally Mosi, R.O. Rege, J.E.O.

A total of 26,233 calving records from three commercial ranches: Mogwooni, Galana and O'ljorai; located in high altitude, humid and low altitude, coastal, and medium altitude rangelands of Kenya, were available for the study over periods between 10 and 30 years. The traits studied were: age at fi...

Enlace original: https://cgspace.cgiar.org/handle/10568/50582

Investigación en Agricultura
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Okeyo Mwai, Ally ,  Mosi, R.O. ,  Rege, J.E.O. ,  [Genetic and phenotypic parameters and trends of reproduction traits in Kenya Boran cows] ,  Genetic and phenotypic parameters and trends of reproduction traits in Kenya Boran cows

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