exampleRAD and exampleRAD_mapping are two very small
simulated "RADdata" datasets for testing polyRAD
functions.  Each has four loci.  exampleRAD is a 
natural population of 100 individuals with a mix of diploid and tetraploid 
loci, with 80 individuals diploid and 20 individuals triploid.
exampleRAD_mapping is a diploid BC1 mapping population with two parents
and 100 progeny.
Msi01genes is a "RADdata" object with 585 taxa and 24 loci,
containing real data from Miscanthus sinensis, obtained by using
VCF2RADdata on the file Msi01genes.vcf.  Most individuals
in Msi01genes are diploid, with three haploids and one triploid.