| Autor: |
Jeffery NW; a Department of Integrative Biology, University of Guelph, Guelph, ON N1G 2W1, Canada., Hultgren K; b Department of Biology, Seattle University, Seattle, WA 98122, USA., Chak ST; c Virginia Institute of Marine Science, The College of William and Mary, Gloucester Point, VA 23062, USA., Gregory TR; a Department of Integrative Biology, University of Guelph, Guelph, ON N1G 2W1, Canada., Rubenstein DR; d Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY 10027, USA.; e Center for Integrative Animal Behavior, Columbia University, New York, NY 10027, USA. |
| Abstrakt: |
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. |
