✦ LIBER ✦

On Gaps

✍ Scribed by Gonzalo Giribet; Ward C. Wheeler

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 283 KB
Volume: 13
Category: Article
ISSN: 1055-7903
DOI: 10.1006/mpev.1999.0643

No coin nor oath required. For personal study only.

✦ Synopsis

Gaps result from the alignment of sequences of unequal length during primary homology assessment. Viewed as character states originating from particular biological events (mutation), gaps contain historical information suitable for phylogenetic analysis. The effect of gaps as a source of phylogenetic data is explored via sensitivity analysis and character congruence among different data partitions. Example data sets are provided to show that gaps contain important phylogenetic information not recovered by those methods that omit gaps in their calculations. However, gap cost schemes are arbitrary (although they must be explicit) and thus data exploration is a necessity of molecular analyses, while character congruence is necessary as an external criterion for hypothesis decision. 1999 Academic Press

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