Genome size

Materials and Methods Genome Size The haploid genome size (C-value, in pg) of 1461 ray-finned fish species (Actinopterygii) was downloaded from the Animal Genome Size Database (www.genomesize.com). Unless otherwise stated, comparisons of genome sizes are performed on the C-values, which can be converted to number of base pairs by the following: number of base pairs = C-value × 0.978 × 109. Several species are represented more than once in this database, often with different estimates of genome size owing to differences in the methods of estimation and the cell types used. We collapsed such redundant cases to single data points by either taking the average (when there are two entries per species) or taking the median (if more than three entries observed for each species). Clear case of recent polyploidy (induced by hybridization or experimental manipulation) has been removed from our data set.