Research Publications Presentations Education Other     Alisa P. Ramakrishnan This is preliminary genetic data for Brachypodium sylvaticum. Here's a pdf file of a poster I just presesnted in a small meeting in DC.

		This is a map with pie diagrams of some Brachypodium sylvaticum genotypes, calculated from three microsatellite loci. The peripheral populations don't have many genotypes at all, suggesting few founders and/or high levels of selfing. One genotype in particular is overrepresented in some of the populations (the red genotype). Is it a 'colonizing' genotype? It's certainly not the most common central genotype, at least not in the populations we've sampled so far. If one of the central populations turns out to have a high frequency of this genotype, we might be able to say that it is acting as a source for several peripheral populations. With more loci and more populations, we should be able to build a nice picture of the dispersal patterns of this invasive grass.
	These are alleles from our most polymorphic locus. When you look at the patterns, most of the peripheral populations are composed mainly of the most common allele. However, the purple alleles are showing up disproportionally in the Blodgett tract (N.OR) and the Head of Metolius (E. OR) sites.
These are alleles from a much less polymorphic, yet still interesting, locus. The peripheral populations aren't as polymorphic as the central populations, but the western-most population is surprisingly polymorphic for a peripheral population.
This is our least polymorphic locus, but it still shows some interesting patterns. Many of the peripheral populations are monomorphic for one allele, but there are some other alleles showing up occasionally.