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Evolutionary implications of the relationship between genome size and body size in flatworms and copepods

✍ Scribed by Gregory, T Ryan; Hebert, Paul D N; Kolasa, Jurek

Publisher: Nature Publishing Group
Year: 2000
Tongue: English
Weight: 131 KB
Volume: 84
Category: Article
ISSN: 0018-067X
DOI: 10.1046/j.1365-2540.2000.00661.x

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✦ Synopsis

Genome and body sizes were measured in 38 species of turbellarian flatworms and 16 species of copepod crustaceans. Significant positive relationships existed between genome size and body size in both groups. The slopes of these regressions indicated that increases in cell volume are reinforced by increased cell numbers, or that cell volumes show positive allometric variation with genome size. Genome sizes appear to vary in a discontinuous fashion among congeneric species in both groups, indicating that such changes have occurred rapidly, and with potentially profound effects on important morphological characters.

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