... Chris H. Floyd a, *, Dirk H. Van Vuren b , Kevin R. Crooks c , Krista L. Jones b , David K. G... more ... Chris H. Floyd a, *, Dirk H. Van Vuren b , Kevin R. Crooks c , Krista L. Jones b , David K. Garcelon d , Natalia M ... Allelic dropout becomes more likely with increasing age and associated decreasing quality of DNA samples (eg, historical or museum specimens—Wandeler et al. ...
Sturgeon (order Acipenserformes) provide an ideal taxonomic context for examination of genome dup... more Sturgeon (order Acipenserformes) provide an ideal taxonomic context for examination of genome duplication events. Multiple levels of ploidy exist among these fish. In a novel microsatellite approach, data from 962 fish from 20 sturgeon species were used for analysis of ploidy in sturgeon. Allele numbers in a sample of individuals were assessed at six microsatellite loci. Species with approximately 120 chromosomes are classified as functional diploid species, species with approximately 250 chromosomes as functional tetraploid species, and with approximately 500 chromosomes as functional octaploids. A molecular phylogeny of the sturgeon was determined on the basis of sequences of the entire mitochondrial cytochrome b gene. By mapping the estimated levels of ploidy on this proposed phylogeny we demonstrate that (I) polyploidization events independently occurred in the acipenseriform radiation; (II) the process of functional genome reduction is nearly finished in species with approximat...
... Chris H. Floyd a, *, Dirk H. Van Vuren b , Kevin R. Crooks c , Krista L. Jones b , David K. G... more ... Chris H. Floyd a, *, Dirk H. Van Vuren b , Kevin R. Crooks c , Krista L. Jones b , David K. Garcelon d , Natalia M ... Allelic dropout becomes more likely with increasing age and associated decreasing quality of DNA samples (eg, historical or museum specimens—Wandeler et al. ...
Sturgeon (order Acipenserformes) provide an ideal taxonomic context for examination of genome dup... more Sturgeon (order Acipenserformes) provide an ideal taxonomic context for examination of genome duplication events. Multiple levels of ploidy exist among these fish. In a novel microsatellite approach, data from 962 fish from 20 sturgeon species were used for analysis of ploidy in sturgeon. Allele numbers in a sample of individuals were assessed at six microsatellite loci. Species with approximately 120 chromosomes are classified as functional diploid species, species with approximately 250 chromosomes as functional tetraploid species, and with approximately 500 chromosomes as functional octaploids. A molecular phylogeny of the sturgeon was determined on the basis of sequences of the entire mitochondrial cytochrome b gene. By mapping the estimated levels of ploidy on this proposed phylogeny we demonstrate that (I) polyploidization events independently occurred in the acipenseriform radiation; (II) the process of functional genome reduction is nearly finished in species with approximat...
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