Defining entities in the Acacia saligna (Fabaceae) species complex using a population genetics approach.

MA Millar, M Byrne, W O'Sullivan

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Traditional morphological taxonomic classification is problematic in the Acacia saligna (Labill.) H.L.Wendl. species complex. Reliable identification of entities within the species is essential due to its extensive use both in Australia and overseas, its propensity for weediness, and its ongoing development for use in agroforestry. We use a Bayesian analysis approach to assess genetic structure in populations across the species natural range and to define the natural distributions of various genetic entities. The results indicate that three highly divergent genetic entities are apparent in the A. saligna species complex with further fine scale genetic subdivision present within two. The three primary genetic entities correspond to the informally described subsp. saligna and subsp. pruinescens combined, subsp. stolonifera, and subsp. lindleyi. Within this primary structure two further entities are apparent; one separating subsp. saligna/pruinescens into eastern and western populations and the other distinguishing north-western lindleyi populations from the rest of that subspecies distribution. The north-western catchments may have been an important refugium for the species diversity. The results of the study will aid in breeding programs, conservation of natural populations and control of invasive populations of this taxon.
Original languageEnglish
Pages (from-to)137-148
Number of pages12
JournalAustralian Journal of Botany
Volume59
Issue number2
Publication statusPublished - 2011

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Acacia saligna
species complex
population genetics
Fabaceae
Bayesian analysis
agroforestry
refugium
genetic structure
subspecies
conservation programs
species diversity
Bayesian theory
refuge habitats
breeding
catchment
geographical distribution
population structure
taxonomy
distribution

Cite this

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title = "Defining entities in the Acacia saligna (Fabaceae) species complex using a population genetics approach.",
abstract = "Traditional morphological taxonomic classification is problematic in the Acacia saligna (Labill.) H.L.Wendl. species complex. Reliable identification of entities within the species is essential due to its extensive use both in Australia and overseas, its propensity for weediness, and its ongoing development for use in agroforestry. We use a Bayesian analysis approach to assess genetic structure in populations across the species natural range and to define the natural distributions of various genetic entities. The results indicate that three highly divergent genetic entities are apparent in the A. saligna species complex with further fine scale genetic subdivision present within two. The three primary genetic entities correspond to the informally described subsp. saligna and subsp. pruinescens combined, subsp. stolonifera, and subsp. lindleyi. Within this primary structure two further entities are apparent; one separating subsp. saligna/pruinescens into eastern and western populations and the other distinguishing north-western lindleyi populations from the rest of that subspecies distribution. The north-western catchments may have been an important refugium for the species diversity. The results of the study will aid in breeding programs, conservation of natural populations and control of invasive populations of this taxon.",
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Defining entities in the Acacia saligna (Fabaceae) species complex using a population genetics approach. / Millar, MA; Byrne, M; O'Sullivan, W.

In: Australian Journal of Botany, Vol. 59, No. 2, 2011, p. 137-148.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Defining entities in the Acacia saligna (Fabaceae) species complex using a population genetics approach.

AU - Millar, MA

AU - Byrne, M

AU - O'Sullivan, W

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AB - Traditional morphological taxonomic classification is problematic in the Acacia saligna (Labill.) H.L.Wendl. species complex. Reliable identification of entities within the species is essential due to its extensive use both in Australia and overseas, its propensity for weediness, and its ongoing development for use in agroforestry. We use a Bayesian analysis approach to assess genetic structure in populations across the species natural range and to define the natural distributions of various genetic entities. The results indicate that three highly divergent genetic entities are apparent in the A. saligna species complex with further fine scale genetic subdivision present within two. The three primary genetic entities correspond to the informally described subsp. saligna and subsp. pruinescens combined, subsp. stolonifera, and subsp. lindleyi. Within this primary structure two further entities are apparent; one separating subsp. saligna/pruinescens into eastern and western populations and the other distinguishing north-western lindleyi populations from the rest of that subspecies distribution. The north-western catchments may have been an important refugium for the species diversity. The results of the study will aid in breeding programs, conservation of natural populations and control of invasive populations of this taxon.

KW - Bayesian analysis, genetic structure, microsatellite, genetic differentiation, bottleneck

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JO - Australian Journal of Botany

JF - Australian Journal of Botany

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