Biodiversity analysis with R (BIO-R) is a set of R programs that do biodiversity analysis of molecular data, in order to calculate heterozygosity, diversity among and within groups, shannon index, number of effective allele, percent of polymorphic loci, Rogers distance, Nei distance, cluster analysis and multidimensional scaling 2D plot and 3D plot
You can include external groups for colored dendogram or MDS plots, and additionally obtain a Core Subset using molecular data and also phenotypic, geographical and any source of data.
 
Ángela Pacheco, Gregorio Alvarado, Francisco Rodríguez, Juan Burgueño
 
Web link
BIO-R for Windows
Download link and setup information on CIMMYT research software repository.