title: Population structure of Mya arenaria along the New England coastline.
abstract: Sequences of the internal transcribed spacer (ITS-1) ribosomal DNA region were compared among 88 soft-shell clams (Mya arenaria) from 12 sites (within three general areas) along the New England coast to determine whether populations were genetically heterogeneous. Two sequence variants were observed, with type 1 having a 3-nucleotide insertion and one point mutation relative to type 2. Allele-specific polymerase chain reaction (PCR); using primers specific to each sequence type, was performed to determine the distribution of individuals who had both allelic forms. DNA from soft-shell clams collected from three areas (Cobscook Bay, Maine; Gulf of Maine; and southern New England) were compared chi 2 analyses of allele-specific PCR results revealed no significant heterogeneity among the three population distributions.
authors.affiliation: Department of Zoology, University of Maine, Orono 04469, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Caporale
authors.forename: B F
authors.initials: BF
authors.lastname: Beal
authors.forename: R
authors.initials: R
authors.lastname: Roxby
authors.forename: R J
authors.initials: RJ
authors.lastname: Van Beneden
mesh_terms: D000483:Alleles; D000818:Animals; D001483:Base Sequence; D049872:Bivalvia / Q000145:classification / Q000235:genetics*; D017931:DNA Primers; D004272:DNA, Mitochondrial / Q000737:chemistry / Q000235:genetics*; D004275:DNA, Ribosomal / Q000737:chemistry* / Q000235:genetics; D014644:Genetic Variation; D008969:Molecular Sequence Data; D009511:New England; D016133:Polymerase Chain Reaction; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D012623:Seawater; D012689:Sequence Homology, Nucleic Acid
chemical_list: D017931:DNA Primers; D004272:DNA, Mitochondrial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D012337:RNA, Ribosomal, 18S