Document Type

Article

Department/Program

Virginia Institute of Marine Science

Publication Date

2016

Journal

Genome

Volume

59

Issue

6

First Page

393

Last Page

402

Abstract

Although crustaceans vary extensively in genome size, little is known about how genome size may affect the ecology and evolution of species in this diverse group, in part due to the lack of large genome size datasets. Here we investigate interspecific, intraspecific, and intracolony variation in genome size in 39 species of Synalpheus shrimps, representing one of the largest genome size datasets for a single genus within crustaceans. We find that genome size ranges approximately 4-fold across Synalpheus with little phylogenetic signal, and is not related to body size. In a subset of these species, genome size is related to chromosome size, but not to chromosome number, suggesting that despite large genomes, these species are not polyploid. Interestingly, there appears to be 35% intraspecific genome size variation in Synalpheus idios among geographic regions, and up to 30% variation in Synalpheus duffyi genome size within the same colony.

DOI

10.1139/gen-2015-0206

Keywords

Image-Analysis Densitometry; Nuclear-Dna Amounts; Intraspecific Variation; Evolution; Synalpheus; Reef; Angiosperms; Eukaryotes; Polyploidy; Alpheidae

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