Linked Life Data

11920131

Source:http://linkedlifedata.com/resource/pubmed/id/11920131

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2002-3-28
pubmed:abstractText
The Acacia acuminata complex is a group of woody shrubs and small trees comprised of three formally described taxa (A. oldfieldii, A. acuminata ssp. acuminata and ssp. burkittii) and two informal taxa ("small seed" and "narrow phyllode") with contrasting geographical distributions within the south-west of Western Australia. In addition, a series of variant populations of possible hybrid origin exist. Population genetic structure was investigated in 25 populations representing the taxa and variants using 16 polymorphic allozyme loci. All taxa and variants exhibited relatively high levels of genetic variation compared with other woody angiosperms with similar geographic distributions. Levels of genetic diversity in the widely distributed ssp. burkittii and "narrow phyllode" taxon were considerably higher (H(e), 0.311 and 0.319, respectively) than expected for widespread woody shrubs. In contrast, the rare and highly restricted A. oldfieldii exhibited significantly lower levels of genetic diversity (H(e), 0.173) compared with the other taxa in the complex, but higher than other rare woody shrubs. Although morphologically close, associations based on genetic distance showed A. oldfieldii was highly divergent from the other taxa (D = 0.85) while including variant populations confused systematic alliances. The unusual placement of some of these populations and high degree of population differentiation (G(ST), 12.7%) supports the suggestion that these may represent a series of hybridisation events between the various taxa.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0018-067X
pubmed:author
pubmed:issnType
Print
pubmed:volume
88
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
250-7
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Genetic diversity within and divergence between rare and geographically widespread taxa of the Acacia acuminata Benth. (Mimosaceae) complex.
pubmed:affiliation
CALMScience, Western Australian Herbarium, Department of Conservation and Land Management, Locked Bag 104, Bentley Delivery Centre, Western Australia 6983.
pubmed:publicationType
Journal Article