quipu-package


The chart shows SSR marker weights on a linear scale where
each allele or 'gel band' is represented by a circle. The
circle's diameter is sized inversely by its rareness within
the set of accessions in the database at hand and within
that locus. The purpose is to facilitate the visual
screening and comparison of genotypes with regard to these
two questions:


Gene banks increasingly use molecular markers for routine
characterization of plant collections and farmer managed diversity. The
gene bank of the International Potato Center presently uses a
micro-satellite marker kit to produce molecular profiles for potato
accessions. We have been searching for a compact graphical representation
that shows both molecular diversity and accession characteristics - thus
permitting biologists and collection curators to have a simple way to
interpret molecular data. Inspired by the ancient Andean data recording
system we devised a graph that allows for standardized representation while
leaving room for updates of the marker kit and the collection of
accessions. The graph has been used in several catalogs of potatoes.

quipu-package: Quipu-type charts for a set of SSR markers.

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