| |
Abstract
In recent years, the importance of horizontal gene transfer (HGT) in bacterial evolution has been elevated to such a degree that many bacteriologists now question the very existence of bacterial species. If gene transfer is as rampant as comparative genomic studies have suggested, how could bacterial species survive such genomic fluidity? And yet, most bacteriologists recognize, and name, as species, clusters of bacterial isolates that ...
|
| |
|
| |
posted to no-tag
by mrvaidya
on 2013-05-16 19:17:29
Abstract
In an era in which support for natural-history collections is waning, we wish to point out how effective even a small, young collection can be.We constructed a Google Scholar profile (called UAM Birds) of publications that used the bird collection we oversee at the ...
|
| |
by Enrique Ibarra-Laclette, Eric Lyons, Gustavo Hernandez-Guzman, et al.Claudia A. Perez-Torres, Lorenzo Carretero-Paulet, Tien-Hao Chang, Tianying Lan, Andreanna J. Welch, Maria J. Juarez, June Simpson, Araceli Fernandez-Cortes, Mario Arteaga-Vazquez, Elsa Gongora-Castillo, Gustavo Acevedo-Hernandez, Stephan C. Schuster, Heinz Himmelbauer, Andre E. Minoche, Sen Xu, Michael Lynch, Araceli Oropeza-Aburto, Sergio A. Cervantes-Perez, Maria de Jesus Ortega-Estrada, Jacob I. Cervantes-Luevano, Todd P. Michael, Todd Mockler, Douglas Bryant, Alfredo Herrera-Estrella, Victor A. Albert, Luis Herrera-Estrella
Abstract
It has been argued that the evolution of plant genome size is principally unidirectional and increasing owing to the varied action of whole-genome duplications (WGDs) and mobile element proliferation. However, extreme genome size reductions have been reported in the angiosperm family tree. Here we report the sequence of the 82-megabase genome of the carnivorous bladderwort plant Utricularia gibba. Despite its tiny size, the U. gibba ...
|
| |
Abstract
Some goods, such as widgets, are freely bought and sold in markets without protest, whereas others, such as indulgences, are not. Some mice that have been bred for use in laboratory experiments turn out to be surplus to requirements and are subsequently sacrificed. Falk and Szech (p. 707) studied the effect that marketplace negotiation has had on experimental subjects' willingness to pay for the upkeep of these surplus mice. Individuals were willing to pay much more to save the mice, but ...
|
| |
posted to no-tag
by mrvaidya
on 2013-05-12 22:22:07
|
| |
Abstract
The remarkably stable circadian oscillations of single cyanobacteria enable a population of growing cells to maintain synchrony for weeks. The cyanobacterial pacemaker is a posttranslational regulation (PTR) circuit that generates circadian oscillations in the phosphorylation state of the clock protein KaiC. Layered on top of the PTR is transcriptional-translational feedback regulation (TTR), common to all circadian systems, consisting of a negative feedback loop in which ...
|
| |
posted to no-tag
by mrvaidya
on 2013-05-09 01:48:48
|
| |
|
| |
posted to no-tag
by mrvaidya
on 2013-05-09 01:46:56
|
| |
posted to no-tag
by mrvaidya
on 2013-05-05 21:06:39
Abstract
Abstract Loss of small herbaria is an unfortunate global trend and initiation of new collections at small academic institutions is an increasingly rare occurrence. In 2006, a new herbarium was established at the State University of New York College at Plattsburgh. The PLAT herbarium has since grown to more than 7,000 specimens, many of them representative of the flora of northeastern New York (especially Clinton County). Previous to 2006, this region was without a recognized herbarium, the nearest in-state collections being ...
|
| |
Abstract
In the Origin of Species, Darwin struggled with how continuous changes within a species lead to the emergence of discrete species. Molecular analyses have since identified nuclear genes and organelles that underpin speciation. In this review, we explore the microbiota as a third genetic component that spurs species formation. We first recall Ivan Wallin's original conception from the early 20th century on the role that bacteria play in speciation. We then describe three fundamental observations that justify a prominent role for ...
|
| |
Abstract
Microscopic eukaryotes are abundant, diverse and fill critical ecological roles across every ecosystem on Earth, yet there is a well-recognized gap in understanding of their global biodiversity. Fundamental advances in DNA sequencing and bioinformatics now allow accurate en masse biodiversity assessments of microscopic eukaryotes from environmental samples. Despite a promising outlook, the field of eukaryotic marker gene surveys faces significant challenges: how to generate data that are most useful to the community, especially in the face of evolving sequencing technologies and ...
|
| |
posted to no-tag
by mrvaidya
on 2013-05-04 22:36:55
Abstract
The total numbers of published synonymous species and genus names were counted for all species of bdelloid rotifers (which are exclusively parthenogenic) and monogonont rotifers (which occasionally reproduce sexually). Synonymous genus names are about equally frequent in both groups, but synonymous species names are less frequent in bdelloids than in monogononts. The difference is not a secondary effect of differences in time since first publication of species, effort or competence of systematists, size of genera, or taxonomic complexity of species. These ...
|
| |
posted to no-tag
by mrvaidya
on 2013-05-04 20:32:44
Abstract
COMPASS shares a decade of experience in helping scientists become effective leaders by navigating a path from outreach to meaningful engagement with journalists and policymakers. ...
|
| |
Abstract
Online social media tools can be some of the most rewarding and informative resources for scientists—IF you know how to use them. ...
|
| |
posted to no-tag
by mrvaidya
on 2013-05-04 07:20:13
Abstract
Botanists estimate that 80 to 90% of existing plant species have already been described and it is expected that most undescribed species are rare or narrow endemic ones. Here we map the geographical distribution of Gymnanthes boticario, a species described in 2010, and show that the species is not only widespread, but was well-collected in the Caatinga semiarid vegetation prior to its description. During a revision of the genus Gymnanthes we also found collections of G. boticario in the Brazilian Mato ...
|
| |
Abstract
BACKGROUND:Personalised medicine provides patients with treatments that are specific to their genetic profiles. It requires efficient data sharing of disparate data types across a variety of scientific disciplines, such as molecular biology, pathology, radiology and clinical practice. Personalised medicine aims to offer the safest and most effective therapeutic strategy based on the gene variations of each subject. In particular, this is valid in oncology, where knowledge about genetic mutations has already led to new therapies. Current molecular biology techniques (microarrays, proteomics, ...
|
| |
posted to no-tag
by mrvaidya
on 2013-05-02 04:38:43
Abstract
As a result of taxonomic uncertainty, generic and higher taxonomic ranks (family, order, class or phylum) are often treated as units in calculating diversity indices, instead of species. In this paper, the errors introduced by such practices are examined for various diversity indices (Shannon - Wiener Index, Maximum Information Index, Evenness, Margalef's Species Richness Index and Hurlbert's Probability of Interspecific Encounter). The use of higher taxonomic ranks may invalidate comparison of diversity indices. In a single study, substantial error and erroneous ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-29 07:16:04
|
| |
The Wilson Journal of Ornithology, Vol. 121, No. 3. (25 August 2009), pp. 618-620, doi:10.1676/09-003.1
posted to no-tag
by mrvaidya
on 2013-04-29 02:45:06
Abstract
Abstract Linnaeus (1766) proposed Certhia pinus based on two different entities, the Blue-winged Warbler (Vermivora pinus) and the Pine Warbler (Dendroica pinus). The confusion was noted by Wilson (1808?1814) who restricted Latham's (1790) Sylvia pinus, based on C. pinus, to the Pine Warbler (in 1811) and proposed, as a new species (in 1810), S. solitaria, for the Blue-winged Warbler. Wilson's effective lectotypification, long ignored, following which Bonaparte (1824) unequivocally restricted C. pinus to the Pine Warbler, has resulted in misapplication of ...
|
| |
Abstract
BACKGROUND:The semantic integration of biomedical resources is still a challenging issue which is required for effective information processing and data analysis. The availability of comprehensive knowledge resources such as biomedical ontologies and integrated thesauri greatly facilitates this integration effort by means of semantic annotation, which allows disparate data formats and contents to be expressed under a common semantic space. In this paper, we propose a multidimensional representation for such a semantic space, where dimensions regard the different perspectives in biomedical research ...
|
| |
Abstract
BACKGROUND:Ontologies are being developed for the life sciences to standardise the way we describe and interpret the wealth of data currently being generated. As more ontology based applications begin to emerge, tools are required that enable domain experts to contribute their knowledge to the growing pool of ontologies. There are many barriers that prevent domain experts engaging in the ontology development process and novel tools are needed to break down these barriers to engage a wider community of scientists.RESULTS:We present Populous, ...
|
| |
Abstract
BACKGROUND:Because of the increasing number of electronic resources, designing efficient tools to retrieve and exploit them is a major challenge. Some improvements have been offered by semantic Web technologies and applications based on domain ontologies. In life science, for instance, the Gene Ontology is widely exploited in genomic applications and the Medical Subject Headings is the basis of biomedical publications indexation and information retrieval process proposed by PubMed. However current search engines suffer from two main drawbacks: there is limited user ...
|
| |
Abstract
BACKGROUND:Semantic Web technologies have been developed to overcome the limitations of the current Web and conventional data integration solutions. The Semantic Web is expected to link all the data present on the Internet instead of linking just documents. One of the foundations of the Semantic Web technologies is the knowledge representation language Resource Description Framework (RDF). Knowledge expressed in RDF is typically stored in so-called triple stores (also known as RDF stores), from which it can be retrieved with SPARQL, a ...
|
| |
Abstract
BACKGROUND:SPARQL query composition is difficult for the lay-person, and even the experienced bioinformatician in cases where the data model is unfamiliar. Moreover, established best-practices and internationalization concerns dictate that the identifiers for ontological terms should be opaque rather than human-readable, which further complicates the task of synthesizing queries manually.RESULTS:We present SPARQL Assist: a Web application that addresses these issues by providing context-sensitive type-ahead completion during SPARQL query construction. Ontological terms are suggested using their multi-lingual labels and descriptions, leveraging existing support ...
|
| |
posted to swat4ls2010
by mrvaidya
on 2013-04-28 07:17:38
Abstract
As Semantic Web technologies mature and new releases of key elements, such as SPARQL 1.1 and OWL 2.0, become available, the Life Sciences continue to push the boundaries of these technologies with ever more sophisticated tools and applications. Unsurprisingly, therefore, interest in the SWAT4LS (Semantic Web Applications and Tools for the Life Sciences) activities have remained high, as was evident during the third international SWAT4LS workshop held in Berlin in December 2010. Contributors to this workshop were invited to submit extended ...
|
| |
posted to description_patterns
by mrvaidya
on 2013-04-24 18:38:59
|
| |
posted to no-tag
by mrvaidya
on 2013-04-24 17:52:56
Abstract
Using a database that includes nearly half (46%) of the estimated 68,000 described species of extant crustaceans, as well as the names of the authors who described each species and the date of description, we plotted the number of species described vs. year of description to examine rates of, and trends in, crustacean species descriptions over time. Plots were generated for all crustaceans and for selected major taxonomic "subgroups" (currently recognized classes and selected subclasses). The cumulative number of species plotted ...
|
| |
Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 368, No. 1618. (19 May 2013), doi:10.1098/rstb.2012.0341
posted to no-tag
by mrvaidya
on 2013-04-23 23:25:52
Abstract
Examining biological diversity in an explicitly evolutionary context has been the subject of research for several decades, yet relatively recent advances in analytical techniques and the increasing availability of species-level phylogenies, have enabled scientists to ask new questions. One such approach is to quantify phylogenetic signal to determine how trait variation is correlated with the phylogenetic relatedness of species. When phylogenetic signal is high, closely related species exhibit similar traits, and this biological similarity decreases as the evolutionary distance between species ...
|
| |
Hystrix, the Italian Journal of Mammalogy (3 May 2013)
Abstract
Ontological and epistemological properties of the Phylogenetic Species Concept (PSC) as applied in recent mammalian taxonomic works are redefined and defended against criticisms raised by Zachos and Lovari (2013), which we find inapplicable to taxonomy because they relate more to the field of population biology. We summarize the negative impacts of the polytypic species concept for conservation and evolutionary biology, with emphasis on Rhinocerotidae. The priority need to embrace and strengthen museum-based taxonomic research is emphasized. ...
|
| |
by Melissa H. Pespeni, Eric Sanford, Brian Gaylord, et al.Tessa M. Hill, Jessica D. Hosfelt, Hannah K. Jaris, Michèle LaVigne, Elizabeth A. Lenz, Ann D. Russell, Megan K. Young, Stephen R. Palumbi
posted to no-tag
by mrvaidya
on 2013-04-23 22:25:02
Abstract
Rising atmospheric carbon dioxide (CO2) conditions are driving unprecedented changes in seawater chemistry, resulting in reduced pH and carbonate ion concentrations in the Earth’s oceans. This ocean acidification has negative but variable impacts on individual performance in many marine species. However, little is known about the adaptive capacity of species to respond to an acidified ocean, and, as a result, predictions regarding future ecosystem responses remain incomplete. Here we demonstrate that ocean acidification generates striking patterns of genome-wide selection in purple ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 09:07:51
Abstract
To mark UNESCO's World Book and Copyright Day on 23 April, Josie Glausiusz asks science editors at leading book publishers about trends and technology. ...
|
| |
by Chris T. Amemiya, Jessica Alföldi, Alison P. Lee, et al.Shaohua Fan, Hervé Philippe, Iain MacCallum, Ingo Braasch, Tereza Manousaki, Igor Schneider, Nicolas Rohner, Chris Organ, Domitille Chalopin, Jeramiah J. Smith, Mark Robinson, Rosemary A. Dorrington, Marco Gerdol, Bronwen Aken, Maria A. Biscotti, Marco Barucca, Denis Baurain, Aaron M. Berlin, Gregory L. Blatch, Francesco Buonocore, Thorsten Burmester, Michael S. Campbell, Adriana Canapa, John P. Cannon, Alan Christoffels, Gianluca De Moro, Adrienne L. Edkins, Lin Fan, Anna M. Fausto, Nathalie Feiner, Mariko Forconi, Junaid Gamieldien, Sante Gnerre, Andreas Gnirke, Jared V. Goldstone, Wilfried Haerty, Mark E. Hahn, Uljana Hesse, Steve Hoffmann, Jeremy Johnson, Sibel I. Karchner, Shigehiro Kuraku, Marcia Lara, Joshua Z. Levin, Gary W. Litman, Evan Mauceli, Tsutomu Miyake, M. Gail Mueller, David R. Nelson, Anne Nitsche, Ettore Olmo, Tatsuya Ota, Alberto Pallavicini, Sumir Panji, Barbara Picone, Chris P. Ponting, Sonja J. Prohaska, Dariusz Przybylski, Nil R. Saha, Vydianathan Ravi, Filipe J. Ribeiro, Tatjana Sauka-Spengler, Giuseppe Scapigliati, Stephen M. J. Searle, Ted Sharpe, Oleg Simakov, Peter F. Stadler, John J. Stegeman, Kenta Sumiyama, Diana Tabbaa, Hakim Tafer, Jason Turner-Maier, Peter van Heusden, Simon White, Louise Williams, Mark Yandell, Henner Brinkmann, Jean-Nicolas Volff, Clifford J. Tabin, Neil Shubin, Manfred Schartl, David B. Jaffe, John H. Postlethwait, Byrappa Venkatesh, Federica Di Palma, Eric S. Lander, Axel Meyer, Kerstin Lindblad-Toh
Abstract
The discovery of a living coelacanth specimen in 1938 was remarkable, as this lineage of lobe-finned fish was thought to have become extinct 70 million years ago. The modern coelacanth looks remarkably similar to many of its ancient relatives, and its evolutionary proximity to our own fish ancestors provides a glimpse of the fish that first walked on land. Here we report the genome sequence of ...
|
| |
Abstract
The way Willi Hennig discovered evolutionary relationships should not be forgotten, say Quentin Wheeler, Leandro Assis and Olivier Rieppel. ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 09:06:32
Abstract
We used a recent passerine phylogeny and comparative method to evaluate the macroevolution of body and egg mass, incubation and fledging periods, time to independence and time with parents of the main passerine lineages. We hypothesised that passerine reproductive traits are affected by adaptation to both past and present environmental factors and phenotypic attributes such as body mass. Our results suggest that the evolution of body and egg mass, time to independence, incubation and fledging times are affected by strong phylogenetic ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 09:05:23
along with 1 person
kvalyi
Abstract
Understanding drivers of biodiversity patterns is of prime importance in this era of severe environmental crisis. More diverse plant communities have been postulated to represent a larger functional trait-space, more likely to sustain a diverse assembly of herbivore species. Here, we expand this hypothesis to integrate environmental, functional and phylogenetic variation of plant communities as factors explaining the diversity of lepidopteran assemblages along elevation gradients in the Swiss Western Alps. According to expectations, we found that the association between butterflies and ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 09:02:45
Abstract
Facultative symbionts can represent important sources of adaptation for their insect hosts and thus have the potential for rapid spread. Drosophila neotestacea harbours a heritable symbiont, Spiroplasma, that confers protection against parasitic nematodes. We previously found a cline in Spiroplasma prevalence across central Canada, ending abruptly at the Rocky Mountains. Resampling these populations 9 years later revealed that Spiroplasma had increased substantially across the region, resembling a Fisherian wave of advance. Associations between Spiroplasma infection and host mitochondrial DNA indicate that the ...
|
| |
by Claire de Mazancourt, Forest Isbell, Allen Larocque, et al.Frank Berendse, Enrica De Luca, James B. Grace, Bart Haegeman, H. Wayne Polley, Christiane Roscher, Bernhard Schmid, David Tilman, Jasper van Ruijven, Alexandra Weigelt, Brian J. Wilsey, Michel Loreau
posted to no-tag
by mrvaidya
on 2013-04-21 09:02:07
Abstract
As biodiversity is declining at an unprecedented rate, an important current scientific challenge is to understand and predict the consequences of biodiversity loss. Here, we develop a theory that predicts the temporal variability of community biomass from the properties of individual component species in monoculture. Our theory shows that biodiversity stabilises ecosystems through three main mechanisms: (1) asynchrony in species’ responses to environmental fluctuations, (2) reduced demographic stochasticity due to overyielding in species mixtures and (3) reduced observation error (including spatial ...
|
| |
by Erin E. Peterson, Jay M. Ver Hoef, Dan J. Isaak, et al.Jeffrey A. Falke, Marie-Josée Fortin, Chris E. Jordan, Kristina McNyset, Pascal Monestiez, Aaron S. Ruesch, Aritra Sengupta, Nicholas Som, E. Ashley Steel, David M. Theobald, Christian E. Torgersen, Seth J. Wenger
posted to no-tag
by mrvaidya
on 2013-04-21 09:00:16
Abstract
Dendritic ecological networks (DENs) are a unique form of ecological networks that exhibit a dendritic network topology (e.g. stream and cave networks or plant architecture). DENs have a dual spatial representation; as points within the network and as points in geographical space. Consequently, some analytical methods used to quantify relationships in other types of ecological networks, or in 2-D space, may be inadequate for studying the influence of structure and connectivity on ecological processes within DENs. We propose a conceptual taxonomy ...
|
| |
by C. Packer, A. Loveridge, S. Canney, et al.T. Caro, S. T. Garnett, M. Pfeifer, K. K. Zander, A. Swanson, D. MacNulty, G. Balme, H. Bauer, C. M. Begg, K. S. Begg, S. Bhalla, C. Bissett, T. Bodasing, H. Brink, A. Burger, A. C. Burton, B. Clegg, S. Dell, A. Delsink, T. Dickerson, S. M. Dloniak, D. Druce, L. Frank, P. Funston, N. Gichohi, R. Groom, C. Hanekom, B. Heath, L. Hunter, H. H. DeIongh, C. J. Joubert, S. M. Kasiki, B. Kissui, W. Knocker, B. Leathem, P. A. Lindsey, S. D. Maclennan, J. W. McNutt, S. M. Miller, S. Naylor, P. Nel, C. Ng'weno, K. Nicholls, J. O. Ogutu, E. Okot-Omoya, B. D. Patterson, A. Plumptre, J. Salerno, K. Skinner, R. Slotow, E. A. Sogbohossou, K. J. Stratford, C. Winterbach, H. Winterbach, S. Polasky
posted to no-tag
by mrvaidya
on 2013-04-21 08:59:01
Abstract
Conservationists often advocate for landscape approaches to wildlife management while others argue for physical separation between protected species and human communities, but direct empirical comparisons of these alternatives are scarce. We relate African lion population densities and population trends to contrasting management practices across 42 sites in 11 countries. Lion populations in fenced reserves are significantly closer to their estimated carrying capacities than unfenced populations. Whereas fenced reserves can maintain lions at 80% of their potential densities on annual management budgets ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 08:57:30
|
| |
by Chris Yesson, Peter W. Brewer, Tim Sutton, et al.Neil Caithness, Jaspreet S. Pahwa, Mikhaila Burgess, W. Alec Gray, Richard J. White, Andrew C. Jones, Frank A. Bisby, Alastair Culham
Abstract
There is a concerted global effort to digitize biodiversity occurrence data from herbarium and museum collections that together offer an unparalleled archive of life on Earth over the past few centuries. The Global Biodiversity Information Facility provides the largest single gateway to these data. Since 2004 it has provided a single point of access to specimen data from databases of biological surveys and collections. Biologists now have rapid access to more than 120 million observations, for use in many biological analyses. ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 08:53:32
Abstract
Ecologists have long studied the temporal dynamics of plant and animal communities with much less attention paid to the temporal dynamics exhibited by microbial communities. As a result, we do not know if overarching temporal trends exist for microbial communities or if changes in microbial communities are generally predictable with time. Using microbial time series assessed via high-throughput sequencing, we conducted a meta-analysis of temporal ...
|
| |
by Daniel McDonald, Jose C. Clemente, Justin Kuczynski, et al.Jai Ram R. Rideout, Jesse Stombaugh, Doug Wendel, Andreas Wilke, Susan Huse, John Hufnagle, Folker Meyer, Rob Knight, J. Gregory Caporaso
posted to no-tag
by mrvaidya
on 2013-04-21 08:52:38
Abstract
We present the Biological Observation Matrix (BIOM, pronounced "biome") format: a JSON-based file format for representing arbitrary observation by sample contingency tables with associated sample and observation metadata. As the number of categories of comparative omics data types (collectively, the "ome-ome") grows rapidly, a general format to represent and archive this data will facilitate the interoperability of existing bioinformatics tools and future meta-analyses. ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 08:48:40
Abstract
Evidence can provide support for or against a particular biogeographical hypothesis. Treating a hypothesis as if it were evidence or an empirical observation confounds many biogeographical analyses. We focus on two recent publications that address, in part, the evolution of the biota of Sulawesi, the large Indonesian island in the centre of the Indo-Australian Archipelago. Many biogeographical explanations are hampered by invoking simple notions of mechanism or process – dispersal and vicariance – or constraints, such as dispersal from a centre ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 08:48:11
Abstract
Aim We sought to understand the variables that limit the distribution range of a clade (here the danthonioid grasses). We tested time, area of origin, habitat suitability, disjunction width and nature, and wind direction as possible range determinants. Location Global, but predominantly the Southern Hemisphere. Methods We mapped the range of the subfamily Danthonioideae, and used 39,000 locality records and an ensemble modelling approach to define areas with suitable danthonioid habitat. We used a well-sampled, dated phylogeny to estimate the number ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 08:44:32
Abstract
Aim To examine mechanisms related to the formation of hybrid zones between the Mediterranean narrow-leaved ash tree Fraxinus angustifolia Vahl and the common ash Fraxinus excelsior L., a mostly temperate tree species, at the continental scale. Location Temperate and Mediterranean Europe and the western part of the Black Sea basin. Methods We used species distribution models to determine the potential zones of sympatry between the two species, which remain largely unknown. In addition, we analysed 58 populations and 456 samples of ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 08:44:02
Abstract
Aim We investigated genetic variation in Bistorta vivipara, a widespread Northern Hemisphere tundra species, to infer patterns of migration and where it may have survived during the Last Glacial Maximum (LGM). Location Samples came primarily from western North America, with a few from the Arctic and Eurasia. Methods We sequenced two chloroplast DNA spacer regions, trnH–psbA and trnS–G, in individuals from 199 populations and mapped haplotype distributions and their relationships using a haplotype network. We calculated genetic and molecular diversity statistics ...
|
| |
posted to no-tag
by mrvaidya
on 2013-04-21 08:41:05
Abstract
Aim Our objective was to reconstruct a species-level phylogeny of the genus Delias, to elucidate their finer-scale biogeography and to test boundaries between closely related taxa. Location Indo-Australian region, with a focus on Wallacea. Methods Sequence data from 131 taxa, representing all recognized species groups and more than half of the known species of Delias, were used in the analysis. Phylogenetic analyses based on molecular characters of the mitochondrial gene cytochrome c oxidase subunit I (COI) and nuclear genes wingless and ...
|
Search
