| The Soybean GBrowse Database handles contigs three
ways: Forward,
reversed, and spread. (See
boats-on-a-lake for how and why contigs are spread.)
The above image shows two different example contigs
displayed forward, reversed, and spread. Example contigs,
ctgA and ctgB, overlap in their normal forward locations
as supplied by the FPC program. (Contigs often appear to
overlap because of the imprecision in converting
centiMorgan locations to base locations.) In their
reverse locations, ctgB moves somewhat to the left. In
their spread locations, ctgB spreads to the left, and
ctgA spreads to the right.
The vertical dashed line represents a location where
a researcher might be looking for features. For example,
an EST might be located at the dashed line. This dashed
line crosses ctgB's location, however, this is the
spread location for ctgB. The researcher would have to
make a judgemental call as to whether or not ctgB should
be considered in the same location as the EST.
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