Linked Life Data

12655140

Source:http://linkedlifedata.com/resource/pubmed/id/12655140

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2003-3-25
pubmed:abstractText
We investigated genetic diversity and phylogenetic relationships among three morphologically distinct populations of Dall's porpoise (Phocoenoides dalli) in Japanese waters by analyzing mitochondrial DNA variation. These populations, the Sea of Japan-Okhotsk dalli-type population, the truei-type population and the standard dalli-type population in the northwestern North Pacific, are clearly discriminated from each other by differences in the size of their white flank patch. A total of 479 bp of the mitochondrial control region and flanking tRNA genes was sequenced for 103 individuals. Haplotypic diversity was high (h = 0.968), but these haplotypes differed by only a few nucleotides (pi = 0.0106). Although many haplotypes were shared between populations, analysis of molecular variance (AMOVA) indicated genetic subdivision among the three populations (overall F (ST) = 0.023, P < 0.001; phi(ST) = 0.026, P = 0.029). Pairwise comparisons indicated a low but significant difference between the Sea of Japan-Okhotsk and the other two populations, whereas there was no significant difference between the latter. These results suggest that there is a close evolutionary relationship among these populations despite their consistent differences in coloration. This may reflect genetic polymorphism in the common ancestral population, which subsequently underwent a rapid divergence. The low genetic variability and haplotypic differentiation of the Sea of Japan-Okhotsk population suggest that it originated from a small population that colonized the Sea of Japan or that experienced population reduction when this Sea was isolated from the North Pacific in the last glacial period.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1341-7568
pubmed:author
pubmed:issnType
Print
pubmed:volume
78
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
81-91
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Phylogeography and population structure of the Dall's porpoise, Phocoenoides dalli, in Japanese waters revealed by mitochondrial DNA.
pubmed:affiliation
Department of Zoology, Graduate School of Science, Kyoto University, Sakyo, Japan. azusa@zoo.zool.kyoto-u.ac.jp
pubmed:publicationType
Journal Article