Data on hypertension
Data from an experiment on hypertension in the mouse.
data(hyper)
An object of class cross. See read.cross
for details.
There are 250 male backcross individuals typed at 174 markers (actually one contains only missing values), including 4 on the X chromosome, with one phenotype.
The phenotype is the blood pressure. See the reference below. Note that, for most markers, genotypes are available on only the individuals with extreme phenotypes. At many markers, only recombinant individuals were typed.
Bev Paigen and Gary Churchill (The Jackson Laboratory, Bar Harbor, Maine) https://phenome.jax.org/projects/Sugiyama2
Sugiyama, F., Churchill, G. A., Higgens, D. C., Johns, C., Makaritsis, K. P., Gavras, H. and Paigen, B. (2001) Concordance of murine quantitative trait loci for salt-induced hypertension with rat and human loci. Genomics 71, 70–77.
data(hyper) summary(hyper) plot(hyper) # Note the selective genotyping ## Not run: plotMissing(hyper, reorder=TRUE) # A marker on c14 has no data; remove it hyper <- drop.nullmarkers(hyper)
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