Systematic and conservation implications of mitochondrial DNA diversity in emu-wrens,<i>Stipiturus</i>(Aves: Maluridae)

Donnellan, Stephen C.; Armstrong, Jeffrey D.; Pickett, Marcus; Milne, Tim; Baulderstone, J.; Hollfelder, T.; Bertozzi, Terry

doi:10.1071/mu07011

Cited by 23 publications

(17 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• Stipiturus : Evolutionary relationships within the Stipiturus genus have been well studied [38], [40], [43]. Our study is consistent with the previous findings: S. mallee and S. ruficeps are closer to each other than they are to S. malachurus .…”

Section: Resultssupporting

confidence: 91%

Accurate Phylogenetic Tree Reconstruction from Quartets: A Heuristic Approach

2014

View full text Add to dashboard Cite

Supertree methods construct trees on a set of taxa (species) combining many smaller trees on the overlapping subsets of the entire set of taxa. A ‘quartet’ is an unrooted tree over taxa, hence the quartet-based supertree methods combine many -taxon unrooted trees into a single and coherent tree over the complete set of taxa. Quartet-based phylogeny reconstruction methods have been receiving considerable attentions in the recent years. An accurate and efficient quartet-based method might be competitive with the current best phylogenetic tree reconstruction methods (such as maximum likelihood or Bayesian MCMC analyses), without being as computationally intensive. In this paper, we present a novel and highly accurate quartet-based phylogenetic tree reconstruction method. We performed an extensive experimental study to evaluate the accuracy and scalability of our approach on both simulated and biological datasets.

show abstract

Section: Resultssupporting

confidence: 91%

Accurate Phylogenetic Tree Reconstruction from Quartets: A Heuristic Approach

2014

View full text Add to dashboard Cite

show abstract

“…Indeed, as in Elphinstone's (2008) study, our data revealed a clear lack of phylogenetic distinctness or monophyly, which Moritz (1994) advocated was needed to support such a distinction. While Phillimore and Owens (2006) have shown that 36% of cases of avian sub-specific taxonomy are justified based on corresponding monophyly, our findings add to a growing number of recent studies of Australian passerines that have uncovered discordance between traditional and molecular taxonomy (Joseph et al 2006;Lee and Edwards 2008;Donnellan et al 2009). For example, Lee and Edwards (2008) revealed incorrect subspecies boundaries in the Red-backed Fairy-wren (Malurus melanocephalus complex), while Donellan et al (2009) found that the boundaries of eight subspecies of the Southern Emu-wren (Stipiturus malachurus) were not concordant with the pattern of molecular evolution of haplotypes, and their spatial distribution.…”

Section: Discussionmentioning

confidence: 45%

Population genetic structure of the endangered Eastern Bristlebird, Dasyornis brachypterus; implications for conservation

2011

View full text Add to dashboard Cite

For species that are habitat specialists or sedentary, population fragmentation may lead to genetic divergence between populations and reduced genetic diversity within populations, with frequent inbreeding. Hundreds of kilometres separate three geographical regions in which small populations of the endangered Eastern Bristlebird, Dasyornis brachypterus, a small, grounddwelling passerine that occurs in fire-prone bushland in eastern Australia, are currently found. Here, we use mitochondrial and microsatellite DNA markers to: (i) assess the sub-specific taxonomy designated to northern range-edge, and central and southern range-edge D. brachypterus, respectively, and (ii) assess levels of standing genetic variation and the degree of genetic subdivision of remnant populations. The phylogenetic relationship among mtDNA haplotypes and their spatial distribution did not support the recognised subspecies boundaries. Populations in different regions were highly genetically differentiated, but in addition, the two largest, neighboring populations (located within the central region and separated by *50 km) were moderately differentiated, and thus are likely closed to migration (microsatellites, F ST = 0.06; mtDNA, F ST = 0.12, H ST = 0.08). Birds within these two populations were genotypically diverse and apparently randomly mating. A long-term plan for the conservation of D. brachypterus's genetic diversity should consider individual populations as separate management units. Moreover, managers should avoid actively mixing birds from different populations or regions, to conserve the genetic integrity of local populations and avoid outbreeding depression, should further translocations be used as a recovery tool for this species.

show abstract

“…eugenii populations and the lack of recent gene flow between them, allowing each to evolve independently. A similar pattern of genetic divergence is also present between eastern and western populations (or species pairs) in many taxa across southern Australia, including grey kangaroos [66], dasyurids [67,68], bandicoots [69], rodents [70], birds [71–73] and reptiles [74]. This widespread pattern of east/west divergence is believed to reflect the separation of mesic fauna by the arid Nullarbor Barrier, as a consequence of the increasing aridity of Australia during the Pleistocene [75,76].…”

Section: Discussionmentioning

confidence: 85%

Extensive genetic differentiation detected within a model marsupial, the tammar wallaby (Notamacropus eugenii)

et al. 2017

View full text Add to dashboard Cite

The tammar wallaby (Notamacropus eugenii) is one of the most intensively studied of all macropodids and was the first Australasian marsupial to have its genome sequenced. However, comparatively little is known about genetic diversity and differentiation amongst the morphologically distinct allopatric populations of tammar wallabies found in Western (WA) and South Australia (SA). Here we compare autosomal and Y-linked microsatellite genotypes, as well as sequence data (~600 bp) from the mitochondrial DNA (mtDNA) control region (CR) in tammar wallabies from across its distribution. Levels of diversity at autosomal microsatellite loci were typically high in the WA mainland and Kangaroo Island (SA) populations (A = 8.9–10.6; He = 0.77–0.78) but significantly reduced in other endemic island populations (A = 3.8–4.1; He = 0.41–0.48). Autosomal and Y-linked microsatellite loci revealed a pattern of significant differentiation amongst populations, especially between SA and WA. The Kangaroo Island and introduced New Zealand population showed limited differentiation. Multiple divergent mtDNA CR haplotypes were identified within both SA and WA populations. The CR haplotypes of tammar wallabies from SA and WA show reciprocal monophyly and are highly divergent (14.5%), with levels of sequence divergence more typical of different species. Within WA tammar wallabies, island populations each have unique clusters of highly related CR haplotypes and each is most closely related to different WA mainland haplotypes. Y-linked microsatellite haplotypes show a similar pattern of divergence although levels of diversity are lower. In light of these differences, we suggest that two subspecies of tammar wallaby be recognized; Notamacropus eugenii eugenii in SA and N. eugenii derbianus in WA. The extensive neutral genetic diversity and inter-population differentiation identified within tammar wallabies should further increase the species value and usefulness as a model organism.

show abstract

Systematic and conservation implications of mitochondrial DNA diversity in emu-wrens,Stipiturus(Aves: Maluridae)

Cited by 23 publications

References 51 publications

Accurate Phylogenetic Tree Reconstruction from Quartets: A Heuristic Approach

Accurate Phylogenetic Tree Reconstruction from Quartets: A Heuristic Approach

Population genetic structure of the endangered Eastern Bristlebird, Dasyornis brachypterus; implications for conservation

Extensive genetic differentiation detected within a model marsupial, the tammar wallaby (Notamacropus eugenii)

Contact Info

Product

Resources

About