Citations with the tag: DIVERGENCE (Biology)

Results 151 - 200

  • Nuclear RFLP variation in Eucalyptus camaldulensis Dehnh. from northern Australia.
    Butcher, P.A.; Otero, A.; McDonald, M.W.; Moran, G.F. // Heredity; May2002, Vol. 88 Issue 5, p402 

    Examines the nuclear RFLP variation in Eucalyptus camaldulensis Dehnh. in northern Australia. Correlation of allele frequencies with longitude; Characteristics of E. camaldulensis Dehnh.; Influence of variation in flowering times on gene flow and the patterns of genetic diversity.

  • Relationships Among Ecologically Important Dimensions of Plant Trait Variation in Seven Neotropical Forests.
    Ian J. Wright; David D. Ackerly; Frans Bongers; Kyle E. Harms; Guillermo Ibarra-Manriquez; Miguel Martinez-Ramos; Susan J. Mazer; Helene C. Muller-Landau; Horacio Paz; Nigel C. A. Pitman; Lourens Poorter; Miles R. Silman; Corine F. Vriesendorp; Cam O. Webb; Mark Westoby; S. Joseph Wright // Annals of Botany; May2007, Vol. 99 Issue 5, p1003 

    Background and AimsWhen ecologically important plant traits are correlated they may be said to constitute an ecological ‘strategy’ dimension. Through identifying these dimensions and understanding their inter-relationships we gain insight into why particular trait...

  • The genomic landscape of species divergence in Ficedula flycatchers.
    Ellegren, Hans; Smeds, Linnéa; Burri, Reto; Olason, Pall I.; Backström, Niclas; Kawakami, Takeshi; Künstner, Axel; Mäkinen, Hannu; Nadachowska-Brzyska, Krystyna; Qvarnström, Anna; Uebbing, Severin; Wolf, Jochen B. W. // Nature; 11/29/2012, Vol. 491 Issue 7426, p756 

    Unravelling the genomic landscape of divergence between lineages is key to understanding speciation. The naturally hybridizing collared flycatcher and pied flycatcher are important avian speciation models that show pre- as well as postzygotic isolation. We sequenced and assembled the 1.1-Gb...

  • A systematic evaluation of hybridization-based mouse exome capture system.
    Gao, Qingsong; Wei Sun; Xintian You; Froehler, Sebastian; Wei Chen // BMC Genomics; 2013, Vol. 14 Issue 1, p1 

    Background: Exome sequencing is increasingly used to search for phenotypically-relevant sequence variants in the mouse genome. All of the current hybridization-based mouse exome capture systems are designed based on the genome reference sequences of the C57BL/6 J strain. Given that the...

  • Studying the Moisture Flux over South and Southwest of Iran: A Case Study from December 10 to 13, 1995 Rain Storm.
    Roshani, Ahmad; Parak, Fateme; Hejazizade, Zahra; Ghaemi, Hooshang // Earth Science Research; Aug2013, Vol. 2 Issue 2, p34 

    During December 10-13, 1995 a destructive flood occurred over the south part of Iran resulting from the intensive rainfall causing the social and economical damages over that area. This study intends to reveal the main moisture source flux which feeds in the rain fall weather system. The...

  • Reproductive asynchrony and population divergence between two tropical bird populations.
    Ignacio T. Moore; Frances Bonier; John C. Wingfield // Behavioral Ecology; Jul2005, Vol. 16 Issue 4, p755 

    High-latitude vertebrates generally breed seasonally and synchronously as the primary environmental cue used to time seasonal processes is photoperiod. Investigations of tropical vertebrates have also documented seasonal reproduction, but it is unclear how synchronous reproduction is, both...

  • Rapid Speciation with Gene Flow Following the Formation of Mt. Etna.
    Osborne, Owen G.; Batstone, Thomas E.; Hiscock, Simon J.; Filatov, Dmitry A. // Genome Biology & Evolution; Sep2013, Vol. 5 Issue 9, p1704 

    Environmental or geological changes can create new niches that drive ecological species divergence without the immediate cessation of gene flow. However, few such cases have been characterized. On a recently formed volcano, Mt. Etna, Senecio aethnensis and S. chrysanthemifolius inhabit...

  • Estimation of Euclidean Distance for Different Morpho-physiological Characters in Some Wild and Cultivated Rice Genotypes (Oryza sativa L.).
    Hoque, M. N.; Rahman, Lutfur // Journal of Biological Sciences; 2007, Vol. 7 Issue 1, p86 

    The pattern of genetic diversity and relation was studied in 2 wild and 3 cultivated rice genotypes of Bangladesh. Euclidean Distance among Jhora (Wild) 4325, Wild 4855, Dular, Hab. Aman 2 and Jagliboro was measured. Comparatively lower distance was found among Jhora 4325 and Jagliboro in...

  • Adaptive Functional Divergence of the Warm Temperature Acclimation-Related Protein (WAP65) in Fishes and the Ortholog Hemopexin (HPX) in Mammals.
    MACHADO, JOâO PAULO; VASCONCELOS, VITOR; ANTUNES, AGOSTINHO // Journal of Heredity; Mar/Apr2014, Vol. 105 Issue 2, p237 

    Gene duplication is an important mechanism that leads to genetic novelty. Different, nonexclusive processes are likely involved, and many adaptive and nonadaptive events may contribute to the maintenance of duplicated genes. In some teleosts, a duplicate copy of die mammalian ortholog Hemopexin...

  • Phenotypic integration of brain size and head morphology in Lake Tanganyika Cichlids.
    Tsuboi, Masahito; Gonzalez-Voyer, Alejandro; Kolm, Niclas // BMC Evolutionary Biology; 2014, Vol. 14 Issue 1, p1 

    Background Phenotypic integration among different anatomical parts of the head is a common phenomenon across vertebrates. Interestingly, despite centuries of research into the factors that contribute to the existing variation in brain size among vertebrates, little is known about the role of...

  • Functional Divergence among Silkworm Antimicrobial Peptide Paralogs by the Activities of Recombinant Proteins and the Induced Expression Profiles.
    Yang, Wanying; Cheng, Tingcai; Ye, Mingqiang; Deng, Xiaojuan; Yi, Huiyu; Huang, Yadong; Tan, Xiang; Han, Dong; Wang, Bo; Xiang, Zhonghuai; Cao, Yang; Xia, Qingyou // PLoS ONE; 2011, Vol. 6 Issue 3, p1 

    Antimicrobial peptides are small-molecule proteins that are usually encoded by multiple-gene families. They play crucial roles in the innate immune response, but reports on the functional divergence of antimicrobial peptide gene families are rare. In this study, 14 paralogs of antimicrobial...

  • Cross-Neutralization Potential of Native Human Papillomavirus N-Terminal L2 Epitopes.
    Conway, Michael J.; Cruz, Linda; Alam, Samina; Christensen, Neil David; Meyers, Craig // PLoS ONE; 2011, Vol. 6 Issue 2, p1 

    Background: Human papillomavirus (HPV) capsids are composed of 72 pentamers of the major capsid protein L1, and an unknown number of L2 minor capsid proteins. An N-terminal ''external loop'' of L2 contains cross-neutralizing epitopes, and native HPV16 virions extracted from 20-day-old...

  • Phylogenetic Status and Timescale for the Diversification of Steno and Sotalia Dolphins.
    Cunha, Haydeé A.; Moraes, Lucas C.; Medeiros, Bruna V.; Lailson-Brito Jr., José; Silva, Vera M. F. da; Solé-Cava, Antonio M.; Schrago, Carlos G. // PLoS ONE; 2011, Vol. 6 Issue 12, p1 

    Molecular data have provided many insights into cetacean evolution but some unsettled issues still remain. We estimated the topology and timing of cetacean evolutionary relationships using Bayesian and maximum likelihood analyses of complete mitochondrial genomes. In order to clarify the...

  • Genetic mapping of two components of reproductive isolation between two sibling species of moths, Ostrinia nubilalis and O. scapulalis.
    Streiff, Réjane; Courtois, Brigitte; Meusnier, Serge; Bourguet, Denis // Heredity; Apr2014, Vol. 112 Issue 4, p370 

    We report the quantitative trait loci (QTL) mapping of reproductive isolation traits between Ostrinia nubilalis (the European corn borer) and its sibling species O. scapulalis (the Adzuki bean borer), focusing on two traits: mating isolation (mi) and pheromone production (Pher). Four genetic...

  • Genetic differentiation and species cohesion in two widespread Central American Begonia species.
    Twyford, A D; Kidner, C A; Ennos, R A // Heredity; Apr2014, Vol. 112 Issue 4, p382 

    Begonia is one of the ten largest plant genera, with over 1500 species. This high species richness may in part be explained by weak species cohesion, which has allowed speciation by divergence in allopatry. In this study, we investigate species cohesion in the widespread Central American Begonia...

  • Population divergence in the wheat leaf rust fungus Puccinia triticina is correlated with wheat evolution.
    Liu, M; Rodrigue, N; Kolmer, J // Heredity; Apr2014, Vol. 112 Issue 4, p443 

    Co-evolution of fungal pathogens with their host species during the domestication of modern crop varieties has likely affected the current genetic divergence of pathogen populations. The objective of this study was to determine if the evolutionary history of the obligate rust pathogen on wheat,...

  • molecular clock (1967) Biology.
    Liu, M; Rodrigue, N; Kolmer, J // Dictionary of Theories; 2002, p349 

    Information on the theory of molecular clock is presented. The theory states that the rate of accumulation of genetic difference between two species is approximately proportional to the evolutionary time that has passed since the species diverged. The studies suggest that the divergence occurred...

  • Dynamic evolution of mir-17-92 gene cluster and related miRNA gene families in vertebrates.
    Guo, Li; Yang, Sheng; Zhao, Yang; Wu, Qian; Chen, Feng // Molecular Biology Reports; Apr2013, Vol. 40 Issue 4, p3147 

    mir-17-92 gene cluster is widely distributed in vertebrates and plays an important role in regulating multiple biological processes. Its dysregulation may be associated with risk of some human cancers. The microRNA (miRNA) members are identified in the three gene families: mir-17, mir-19 and...

  • Zoogeography of Intertidal Communities in the West Indian Ocean as Determined by Ocean Circulation Systems: Patterns from the Tetraclita Barnacles.
    Ling Ming Tsang; Yair Achituv; Ka Hou Chu; Benny Kwok Kan Chan; Senjie Lin // PLoS ONE; Sep2012, Vol. 7 Issue 9, Special section p1 

    The Indian Ocean is the least known ocean in the world with the biogeography of marine species in the West Indian Ocean (WIO) understudied. The hydrography of WIO is characterized by four distinct oceanographic systems and there were few glacial refugia formations in the WIO during the...

  • Applications of Ecological Niche Modeling for Species Delimitation: A Review and Empirical Evaluation Using Day Geckos (Phelsuma) from Madagascar.
    Raxworthy, Christopher J.; Ingram, Colleen M.; Rabibisoa, Nirhy; Pearson, Richard G. // Systematic Biology; Dec2007, Vol. 56 Issue 6, p907 

    Although the systematic utility of ecological niche modeling is generally well known (e.g., concerning the recognition and discovery of areas of endemism for biogeographic analyses), there has been little discussion of applications concerning species delimitation, and to date, no empirical...

  • Species Concepts and Species Delimitation.
    De Queiroz, Kevin // Systematic Biology; Dec2007, Vol. 56 Issue 6, p879 

    The issue of species delimitation has long been confused with that of species conceptualization, leading to a half century of controversy concerning both the definition of the species category and methods for inferring the boundaries and numbers of species. Alternative species concepts agree in...

  • Comparing the Usefulness of Distance, Monophyly and Character-Based DNA Barcoding Methods in Species Identification: A Case Study of Neogastropoda.
    Shanmei Zou; Qi Li; Lingfeng Kong; Hong Yu; Xiaodong Zheng // PLoS ONE; 2011, Vol. 6 Issue 10, p1 

    Background: DNA barcoding has recently been proposed as a promising tool for the rapid species identification in a wide range of animal taxa. Two broad methods (distance and monophyly-based methods) have been used. One method is based on degree of DNA sequence variation within and between...

  • Repeated Lake-Stream Divergence in Stickleback Life History within a Central European Lake Basin.
    Moser, Dario; Roesti, Marius; Berner, Daniel // PLoS ONE; Dec2012, Vol. 7 Issue 12, p1 

    Life history divergence between populations inhabiting ecologically distinct habitats might be a potent source of reproductive isolation, but has received little attention in the context of speciation. We here test for life history divergence between threespine stickleback inhabiting Lake...

  • A Passerine Bird's Evolution Corroborates the Geologic History of the Island of New Guinea.
    Deiner, Kristy; Lemmon, Alan R.; Mack, Andrew L.; Fleischer, Robert C.; Dumbacher, John P. // PLoS ONE; 2011, Vol. 6 Issue 5, p1 

    New Guinea is a biologically diverse island, with a unique geologic history and topography that has likely played a role in the evolution of species. Few island-wide studies, however, have examined the phylogeographic history of lowland species. The objective of this study was to examine...

  • Ancient Gene Duplicates in Gossypium (Cotton) Exhibit Near-Complete Expression Divergence.
    Renny-Byfield, Simon; Gallagher, Joseph P.; Grover, Corrinne E.; Szadkowski, Emmanuel; Page, Justin T.; Udall, Joshua A.; Wang, Xiyin; Paterson, Andrew H.; Wendel, Jonathan F. // Genome Biology & Evolution; Mar2014, Vol. 6 Issue 3, p559 

    Whole genome duplication (WGD) is widespread in flowering plants and is a driving force in angiosperm diversification. The redundancy introduced by WGD allows the evolution of novel gene interactions and functions, although the patterns and processes of diversification are poorly understood. We...

  • A new dendroecological method to differentiate growth responses to fine-scale disturbance from regional-scale environmental variation.
    Thompson, R. Douglas; Daniels, Lori D.; Lewis, Kathy J. // Canadian Journal of Forest Research; Jun2007, Vol. 37 Issue 6, p1034 

    A new dendroecological method is developed to differentiate growth responses to fine-scale disturbance from regional-scale environmental variation. In spruce�fir forests of central British Columbia, release from suppression in response to overhead canopy tree mortality was calibrated as...

  • Laser Transmission Holograms Maximum Permissible Exposure.
    Dawson, Paula; Wilksch, P. A. // AIP Conference Proceedings; 5/31/2010, Vol. 1226 Issue 1, p147 

    The laser illumination of holograms for public display is governed by international standard IEC 60825-3, to which the Australian Standard AS/NZS 2211.3 conforms. These standards do not accommodate vital mitigating factors of hologram replay that impinge on the level of laser power i.e. angle of...

  • Accounting for the Error due to Unresolved Scales in Ensemble Data Assimilation: A Comparison of Different Approaches.
    Hamill, Thomas M.; Whitaker, Jeffrey S. // Monthly Weather Review; Nov2005, Vol. 133 Issue 11, p3132 

    Insufficient model resolution is one source of model error in numerical weather predictions. Methods for parameterizing this error in ensemble data assimilations are explored here. Experiments were conducted with a two-layer primitive equation model, where the assumed true state was a T127...

  • Systematics of the North American menhadens: molecular evolutionary reconstructions in the genus Brevoortia (Clupeiformes: Clupeidae).
    Anderson, Joel D. // Fishery Bulletin; Jul2007, Vol. 105 Issue 3, p368 

    Evolutionary associations among the four North American species of menhadens (Brevoortia spp.) have not been thoroughly investigated. In the present study, classifications separating the four species into small-scaled and large-scaled groups were evaluated by using DNA data, and genetic...

  • An overview of the processes shaping protein evolution.
    Sleator, Roy D. // Science Progress; Mar2010, Vol. 93 Issue 1, p1 

    From a comparatively small number of protein structural domains a staggering array of structural variants has evolved which has, in turn, facilitated an expanse of functional derivatives. Herein I review the primary mechanisms which have contributed to the vastness of our existing, and...

  • Molecular phylogeny of Alnus (Betulaceae), inferred from nuclear ribosomal DNA ITS sequences.
    Navarro, Elisabeth; Bousquet, Jean; Moiroud, Andr�; Munive, Antonio; Piou, Dominique; Normand, Philippe // Plant & Soil; Jul2003, Vol. 254 Issue 1, p207 

    The nuclear ITS region of 19 species of Alnus was amplified and sequenced. The inferred molecular phylogeny shows that all species of the genus Alnus form a monophyletic group close to Betula and that the fundamental dichotomy within the genus lies between the subgenera Alnaster and...

  • Evolution of Dystaenia takesimana (Apiaceae), endemic to Ullung Island, Korea.
    Pfosser, M.; Jakubowsky, G.; Schl�ter, P.; Fer, T.; Kato, H.; Stuessy, T.; Sun, B.-Y. // Plant Systematics & Evolution; Nov2005, Vol. 256 Issue 1-4, p159 

    Dystaenia (Apiaceae) consists of two species, one distributed in Japan ( D. ibukiensis), and the other endemic to Ullung Island, Korea ( D. takesimana). In comparison with representative outgroup taxa in Ligusticum, Seseli, Angelica, and Osmorhiza, Dystaenia is shown to be monophyletic based on...

  • Normapolles plants: a prominent component of the Cretaceous rosid diversification.
    Friis, E.; Pedersen, K.; Sch�nenberger, J. // Plant Systematics & Evolution; Sep2006, Vol. 260 Issue 2-4, p107 

    The Normapolles complex, characterised by its oblate and triaperturate pollen, constitutes an important and diverse element of many Late Cretaceous and Early Cainozoic floras of the Northern Hemisphere. Based on the dispersed pollen record alone it has been difficult to assess systematic...

  • Internal Repetition and Intraindividual Variation in the rDNA ITS1 of the Anopheles punctulatus Group (Diptera: Culicidae): Multiple Units and Rates of Turnover.
    Bower, James E.; Cooper, Robert D.; Beebe, Nigel W. // Journal of Molecular Evolution; Jan2009, Vol. 68 Issue 1, p66 

    The rapid divergence of repetitive sequences makes them desirable markers for phylogenetic studies of closely related groups, provided that a high level of sequence homogeneity has been maintained within species. Intraspecific polymorphisms are found in an increasing number of studies now, and...

  • Genetic structure of peripheral, island-like populations: a case study of Saponaria bellidifolia Sm. (Caryophyllaceae) from the Southeastern Carpathians.
    Cserg�, Anna-M�ria; Sch�nswetter, Peter; Mara, Gy�ngyv�r; De�k, Tam�s; Boscaiu, Nicolae; H�hn, M�ria // Plant Systematics & Evolution; Mar2009, Vol. 278 Issue 1/2, p33 

    Geographically peripheral populations often experience a reduction of genetic diversity and divergence from the core populations. Habitat geometry and quality can induce a local genetic diversity pattern, which overlies the regional variability issued from the range-wide phylogeography. We...

  • Genetic Structure in Contemporary South Tyrolean Isolated Populations Revealed by Analysis of Y-Chromosome, mtDNA, and Alu Polymorphisms.
    Pichler, Irene; Mueller, Jakob C.; Stefanov, Stefan A.; de Grandi, Alessandro; Volpato, Claudia Beu; Pinggera, Gerd K.; Mayr, Agnes; Ogriseg, Martin; Ploner, Franz; Meitinger, Thomas; Pramstaller, Peter P. // Human Biology; Aug2006, Vol. 78 Issue 4, p441 

    Most of the inhabitants of South Tyrol in the eastern Italian Alps can be considered isolated populations because of their physical separation by mountain barriers and their sociocultural heritage. We analyzed the genetic structure of South Tyrolean populations using three types of genetic...

  • Prevalence of monochloroacetate degrading genotypes among soil isolates of Pseudomonas sp.
    Kocabiyik, Semra; Caba, Ebru // Biodegradation; 1998, Vol. 8 Issue 6, p371 

    This study reports the isolation of Pseudomonas sp. strains with monochloroacetate (MCA) degradation function, from uncontaminated soil, and the use of Southern blot hybridization technique to detect MCA degrading catabolic genes and their divergence. Based on their capacity to remove Cl- from...

  • An outline of the theory of the genetic divergence of dry-land and bog populations of Pinus sylvestris L.
    Sannikov, S.; Petrova, I. // Russian Journal of Ecology; Sep2010, Vol. 41 Issue 5, p393 

    The thesis of the genetic divergence of Pinus sylvestris L. populations that have spread to bogs from the original dry-land populations has been deduced from the concept of the cyclicity of helio- and geophysical processes, derivative postulates on climatic cycles, formation of Holocene high...

  • Late ontogeny growth acceleration and size form transformations in Transbaikalian Arctic charr, Salvelinus alpinus complex: evidence from fin ray cross section growth layers.
    Alekseyev, Sergey; Mina, Mikhail; Smirina, Ella; Sokolov, Aleksey // Environmental Biology of Fishes; Dec2009, Vol. 86 Issue 4, p487 

    In some polymorphic populations of Arctic charr in Transbaikalia, an individual can transform from a smaller to larger size form during their lifetime as a result of accelerated growth that follows a period of slow growth and reproduction as a small size form. Alternating periods of slow and...

  • Inherited maternal effects on the drought tolerance of a natural hybrid aquatic plant, Potamogeton anguillanus.
    Iida, Satoko; Yamada, Ayumi; Amano, Momoe; Ishii, Jun; Kadono, Yasuro; Kosuge, Keiko // Journal of Plant Research; Jul2007, Vol. 120 Issue 4, p473 

    We tested whether maternal effects have led to the adaptive divergence of strains of the natural hybrid Potamogeton anguillanus, whose putative parents show contrastingly divergent ecologies. To examine the correlation between phenotypic characters and maternal types, we conducted drought...

  • Ecological diversity and speciation in land snails of the genus Mandarina from the Bonin Islands.
    Chiba, Satoshi // Population Ecology; Dec2002, Vol. 44 Issue 3, p0179 

    Endemic land snails of the genus Mandarina of the oceanic Bonin Islands offer an example of habitat and character divergence among closely related species. The molecular phylogenies of Mandarina show that a divergence of arboreal, semiarboreal, and ground-dwelling species has occurred repeatedly...

  • The origins of postmating reproductive isolation: testing hypotheses in the grasshopper Chorthippus parallelus.
    Tregenza, Tom; Pritchard, Victoria L.; Butlin, Roger K. // Population Ecology; Dec2002, Vol. 44 Issue 3, p0137 

    Although there are several well-established hypotheses for the origins of postmating isolation during allopatric divergence, there have been very few attempts to determine their relative importance in nature. We have developed an approach based on knowledge of the differing evolutionary...

  • Antitropicality of Pacific Fishes: Molecular Insights.
    Burridge, Christopher P. // Environmental Biology of Fishes; Oct2002, Vol. 65 Issue 2, p151 

    Twenty-one molecular genetic studies of thirteen antitropical Pacific fishes are herein reviewed. High dispersal potentials and Plio-Pleistocene transequatorial divergence are suggested for approximately half of the taxa studied, consistent with movement across the tropics during glacial...

  • Ecological speciation! Or the lack thereof?
    Hendry, Andrew P. // Canadian Journal of Fisheries & Aquatic Sciences; Aug2009, Vol. 66 Issue 8, p1383 

    Ecological speciation occurs when adaptation to different environments or resources causes the evolution of reproductive isolation. This process is now thought to be very important in the evolution of biological diversity. Indeed, support for ecological speciation is so often asserted in the...

  • Estimating Divergence Times in Large Phylogenetic Trees.
    Britton, Tom; Anderson, Cajsa Lisa; Jacquet, David; Lundqvist, Samuel; Bremer, K�re // Systematic Biology; Oct2007, Vol. 56 Issue 5, p741 

    A new method, PATHd8, for estimating ultrametric trees from trees with edge (branch) lengths proportional to the number of substitutions is proposed. The method allows for an arbitrary number of reference nodes for time calibration, each defined either as absolute age, minimum age, or maximum...

  • Accounting for Solvent Accessibility and Secondary Structure in Protein Phylogenetics Is Clearly Beneficial.
    SI QUANG LE; GASCUEL, OLIVIER // Systematic Biology; May2010, Vol. 59 Issue 3, p277 

    Amino acid substitution models are essential to most methods to infer phylogenies from protein data. These models represent the ways in which proteins evolve and substitutions accumulate along the course of time. It is widely accepted that the substitution processes vary depending on the...

  • Accommodating Heterogenous Rates of Evolution in Molecular Divergence Dating Methods: An Example Using Intercontinental Dispersal of Plestiodon (Eumeces) Lizards.
    BRANDLEY, MATTHEW C.; YUEZHAO WANG; XIANGUANG GUO; NIETO MONTES DE OCA, ADR�A N.; FER�A-ORT�Z, MANUEL; HIKIDA, TSUTOMU; OTA, HIDETOSHI // Systematic Biology; Jan2011, Vol. 60 Issue 1, p3 

    Identifying and dating historical biological events is a fundamental goal of evolutionary biology, and recent analytical advances permit the modeling of factors known to affect both the accuracy and the precision of molecular date estimates. As the use of multilocus data sets becomes...

  • Fitness Landscapes in Individual-Based Simulation Models of Adaptive Radiation.
    Paperin, Greg; Green, David; Dorin, Alan // AIP Conference Proceedings; 11/2/2007, Vol. 952 Issue 1, p268 

    We provide a brief overview of the use of FLs in evolutionary biology and introduce an FL model suitable for individual-based models of species evolution. Our model combines different features of several analytic FL models used in evolutionary biology. Our new model overcomes several...

  • Maximum tree: a consistent estimator of the species tree.
    Liang Liu; Yu, Lili; Pearl, Dennis K. // Journal of Mathematical Biology; Jan2010, Vol. 60 Issue 1, p95 

    We propose a model based approach to use multiple gene trees to estimate the species tree. The coalescent process requires that gene divergences occur earlier than species divergences when there is any polymorphism in the ancestral species. Under this scenario, speciation times are restricted to...

  • An irregular complex valued solution to a scalar uniformly elliptic equation.
    Frehse, Jens // Calculus of Variations & Partial Differential Equations; Nov2008, Vol. 33 Issue 3, p263 

    We present an irregular weak solution $${u : \mathbb {R}^n \to \mathbb {C}}$$ of a uniformly elliptic scalar equation in divergence form with measurable coefficients. The solution has a square integrable gradient. Such examples have been known for dimension n = 5 only.

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