How is genetic variability in the threatened rainforest vine Marsdenia longiloba distributed at different geographical scales?

Alison Shapcott; Robert W Lamont; Katie M O'Connor; Heather E James; Andrew Benwell

doi:10.1111/boj.12494

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How is genetic variability in the threatened rainforest vine Marsdenia longiloba distributed at different geographical scales?

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How is genetic variability in the threatened rainforest vine Marsdenia longiloba distributed at different geographical scales?

Alison Shapcott, Robert W Lamont, Katie M O'Connor, Heather E James and Andrew Benwell

Botanical Journal of the Linnean Society, Vol.183(1), pp.106-123

2017

DOI: https://doi.org/10.1111/boj.12494

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Abstract

apocynaceae

asclepiadoideae

conservation genetics

DNA barcoding

endangered species.

Genetic analysis of rainforest vines has seldom been undertaken. Thus the genetic implications of habitat fragmentation are largely unknown, making guidance for conservation, recovery and translocations of threatened rainforest vines unpredictable. The threatened rainforest vine Marsdenia longiloba (Apocynaceae) has potentially been impacted by development and habitat fragmentation. This Australian species has rarely been observed to reproduce sexually leading to ambiguity in field identification and it was thought populations may be largely clonal. Genetic analysis was undertaken to clarify field identification, examine patterns of genetic variability and related aspects of its breeding system and identify patterns of genetic variation within and between populations of M. longiloba across the range of the species. Genetic variability was examined at fine, medium and broad geographical scales. The combination of DNA barcoding and microsatellite analysis has resolved potential species misidentifications in the field collections. Genetic analysis indicated that M. longiloba is not genetically depauperate and that larger populations contain more genetic diversity than smaller ones. Populations were not primarily composed of clones, although partial clonal structuring was detected especially in the southern part of its distribution. There was evidence of genetic clustering of plants at a medium landscape scale, but little evidence of broad regional genetic differences.

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Title: How is genetic variability in the threatened rainforest vine Marsdenia longiloba distributed at different geographical scales?
Authors: Alison Shapcott (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Robert W Lamont (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Katie M O'Connor (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Heather E James (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Andrew Benwell (Author) - ECOS Environmental Pty Ltd
Publication details: Botanical Journal of the Linnean Society, Vol.183(1), pp.106-123
Publisher: Wiley-Blackwell Publishing Ltd.
Date published: 2017
DOI: 10.1111/boj.12494
ISSN: 0024-4074
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy; Academic Support Unit; School of Science, Technology and Engineering; School of Law and Society; Centre for Bioinnovation
Language: English
Record Identifier: 99450478802621
Output Type: Journal article

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