[adegenet-forum] interpretation of DAPC axes
Pfau, Dr. Russell S.
PFAU at tarleton.edu
Wed Dec 8 17:45:58 CET 2010
I apologize, there was a type that may make my situation difficult to understand. The next to last sentence should read as "A PcoA and STRUCTURE analysis of the same data *show* hierarchical clustering (two divergent populations, one having subpopulations with introgression occurring among the subpopulations)".
>|From: adegenet-forum-bounces at lists.r-forge.r-project.org
>|[mailto:adegenet-forum-bounces at lists.r-forge.r-project.org] On Behalf
>|Of Pfau, Dr. Russell S.
>|Sent: Wednesday, December 08, 2010 10:41 AM
>|To: adegenet-forum at lists.r-forge.r-project.org
>|Subject: [adegenet-forum] interpretation of DAPC axes
>|I'm a little uncertain how to interpret the axes of the scatterplot of
>|the DAPC. I know how to interpret the axes of a PCA or PcOA. For
>|example, Fig 8 of your BMC Genetics paper shows a U-shaped
>|pattern...which is also seen in Fig 4 c and d. Is this the 'arch
>|effect' or 'horseshoe effect'? Is this a problem? How is it
>|I've just run a DAPC of one of my datasets (with 24 populations) and
>|the DAPC scatterplot shows populations arranged in a *prefect*
>|circle...a donut shape. How would one interpret that? A PcoA and
>|STRUCTURE analysis of the same data who hierarchical clustering (two
>|divergent populations, one having subpopulations with introgression
>|occurring among the subpopulations). The donut makes me think this is
>|a ring species which I know it is not.
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