Murine models have proved to be excellent tools in the support of studies of the human genetic bases of malaria resistance and have enabled the mapping of 12 resistance loci, eight of them controlling parasitic levels and four controlling cerebral malaria. Further studies using this method have i...
Hernández Valladares, M.
,
Naessens, Jan
,
Iraqi, F.A.
,
[Genetic resistance to malaria in mouse models]
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Genetic resistance to malaria in mouse models
This study uses heteroskedastic Tobit and Censored Least Absolute Deviations models to examine the impacts of dairy cow ownership on selected outcomes for a sample of 184 households in coastal Kenya. The outcomes examined include gross household cash income, gross non-agricultural income, consump...
Nicholson, C.
,
Thornton, Philip K.
,
Muinga, R.W.
,
[Household-level impacts of dairy cow ownership in coastal Kenya]
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Household-level impacts of dairy cow ownership in coastal Kenya
Poverty, low crop and animal productivity and large scale resource degradation are major problems in the agriculture sector in the East African highlands. Among others, integration of forage legumes in cereal based cropping systems has been proposed as a promising strategy to improve the sustaina...
Kassie, M.
,
Jabbar, M.A.
,
Kassa, B.
,
Mohamed-Saleem, M.A.
,
[Benefits of integration of cereals and forage legumes with and without crossbred cows in mixed farms - an ex ante analysis for highland Ethiopia]
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Benefits of integration of cereals and forage legumes with and without crossbred cows in mixed farms - an ex ante analysis for highland Ethiopia
Heartwater, caused by the rickettsial organism Cowdria ruminantium, is a serious constraint to livestock development in much of sub-Saharan Africa. Traditionally, the disease has been controlled by the use of chemical acaricides to control the vector tick. The University of Florida/USAID-supporte...
Mukhebi, A.W.
,
Chamboko, Tafireyi
,
O'Callaghan, C.J.
,
Peter, T.F.
,
Kruska, R.L.
,
Medley, G.F.
,
Mahan, S.M.
,
Perry, Brian D.
,
[An assessment of the economic impact of heartwater (Cowdria ruminantium infection) and its control in Zimbabwe]
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An assessment of the economic impact of heartwater (Cowdria ruminantium infection) and its control in Zimbabwe
The West African Sahel rainfall regime is known for its spatio-temporal variability at different scales which has a strong impact on vegetation development. This study presents results of the combined use of a simple water balance model, a radiative transfer model and ERS scatterometer data to ...
Jarlan, L.
,
Mazzega, P.
,
Mougin, E.
,
Lavenu, F.
,
Marty, G.
,
Frison, P.L.
,
Hiernaux, Pierre H.Y.
,
[Mapping of Sahelian vegetation parameters from ERS scatterometer data with an evolution strategies algorithm]
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Mapping of Sahelian vegetation parameters from ERS scatterometer data with an evolution strategies algorithm
The goal of this paper is to highlight the use and interpretation of statistical techniques that account for correlation in epidemiological data. A conceptual statistical background is provided, and the main types of regression models for correlated data are highlighted. These models include marg...
Schukken, Y.H.
,
Grohn, Y.T.
,
McDermott, B.
,
McDermott, John J.
,
[Analysis of correlated discrete observations: Background, examples and solutions]
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Analysis of correlated discrete observations: Background, examples and solutions
Breeding objectives were developed for meat sheep in smallholder production circumstances in the tropics. The traits considered were litter size, lambing frequency, pre-weaning, and post-weaning lamb survival to 12 months, ewe survival, lamb live weight at 12-month, mature ewe live weight, consum...
Kosgey, I.S.
,
Arendonk, Johan A.M. van
,
Baker, R.L.
,
[Economic values for traits of meat sheep in medium to high production potential areas of the tropics]
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Economic values for traits of meat sheep in medium to high production potential areas of the tropics
The objective of this study was to evaluate whether the efficacy of marker assisted selection (MAS) could be improved by considering a confidence interval (CI) of QTL position. Specifically, MAS was applied for within-family selection in a stochastic simulation of a closed nucleus herd. The locat...
Stella, A.
,
Janson, G.B.
,
Boettcher, P.J.
,
Gibson, John P.
,
Lohuis, M.M.
,
Pagnacco, G.
,
[Accounting for uncertainty in QTL location in marker-assisted
pre-selection of young bulls prior to progeny test]
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Accounting for uncertainty in QTL location in marker-assisted
pre-selection of young bulls prior to progeny test
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...
Abegaz, S.
,
Negussie, E.
,
Duguma, G.
,
Rege, J.E.O.
,
[Genetic parameter estimates for growth traits in Horro sheep]
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Genetic parameter estimates for growth traits in Horro sheep
The genetic relationship between five Belgian breeds (Belgian Blue, Black Pied, Red Pied, White and Red of East Flanders, Red of West Flanders), an African taurine N'Dama breed and a captive American bison herd was studied by means of 31 microsatellite loci. On the basis of the allele frequencies...
Mommens, G.
,
Peelman, L.J.
,
Zeveren, A. van
,
D'Ieteren, G.D.M.
,
Wissocq, N.M.
,
[Microsatellite variation between an African and five European taurine breeds results in a geographical phylogenetic tree with a bison outgroup]
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Microsatellite variation between an African and five European taurine breeds results in a geographical phylogenetic tree with a bison outgroup