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Genetic diversity and dispersal of the moss Sarconeurum glaciale on Ross Island, East Antarctica

Skotnicki, Mary; Ninham, J; Selkirk, Patricia M

Description

The extent of genetic variation and dispersal mechanisms were investigated over short distances of 1-100 m, and up to 3 km, by the random amplified polymorphic DNA (RAPD) technique, for the moss Sarconeurum glaciale, at three locations on Ross Island, Antarctica. At Arrival Heights, genetic variation occurred within single colonies, and the relationships between clumps indicated that they were dispersed down small, meltwater drainage channels by water. The genetic similarities between the...[Show more]

dc.contributor.authorSkotnicki, Mary
dc.contributor.authorNinham, J
dc.contributor.authorSelkirk, Patricia M
dc.date.accessioned2015-12-13T23:34:59Z
dc.identifier.issn0962-1083
dc.identifier.urihttp://hdl.handle.net/1885/93703
dc.description.abstractThe extent of genetic variation and dispersal mechanisms were investigated over short distances of 1-100 m, and up to 3 km, by the random amplified polymorphic DNA (RAPD) technique, for the moss Sarconeurum glaciale, at three locations on Ross Island, Antarctica. At Arrival Heights, genetic variation occurred within single colonies, and the relationships between clumps indicated that they were dispersed down small, meltwater drainage channels by water. The genetic similarities between the colonies from Arrival Heights and others from Scott Base and Crater Hill, a few km away, together with the prevailing wind direction and absence of this moss in the intervening snow-covered area, suggested longer-distance dispersal by wind. Overall, the Ross Island samples appeared to form a single, polymorphic population that was distinct from another population at Canada Glacier, 110 km distant. Somatic mutation, rather than immigration of genetically different propagules from elsewhere, appeared to be the most probable cause of genetic variability in these haploid, vegetatively reproducing Antarctic moss populations. Initiation of recolonization of S. glaciale across a dirt track at Arrival Heights was also investigated by RAPDs, to investigate how regrowth of mosses in disturbed areas occurred in the extreme environment of Antarctica.
dc.publisherBlackwell Publishing Ltd
dc.sourceMolecular Ecology
dc.subjectKeywords: antarctica; canada; dispersal; environment; genetic difference; genetic diversity; haploidy; plant growth; random amplified polymorphic DNA; somatic mutation; Sarconeurum glaciale Antarctica; Colonization; Genetic diversity; Moss; RAPD; Sarconeurum glaciale
dc.titleGenetic diversity and dispersal of the moss Sarconeurum glaciale on Ross Island, East Antarctica
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume8
dc.date.issued1999
local.identifier.absfor060308 - Life Histories
local.identifier.ariespublicationMigratedxPub25096
local.type.statusPublished Version
local.contributor.affiliationSkotnicki, Mary, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationNinham, J, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationSelkirk, Patricia M, Macquarie University
local.description.embargo2037-12-31
local.bibliographicCitation.startpage753
local.bibliographicCitation.lastpage762
local.identifier.doi10.1046/j.1365-294X.1999.00619.x
dc.date.updated2015-12-12T09:38:13Z
local.identifier.scopusID2-s2.0-0033025629
CollectionsANU Research Publications

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