نتایج جستجو برای: ancestral state reconstruction
تعداد نتایج: 984857 فیلتر نتایج به سال:
1. Modern phylogenetic comparative biology uses data from the relationships between species (phylogeny) combined with comparative information for phenotypic traits to draw model-based statistical inferences about the evolutionary past. Recent years have seen phylogeny methods for evolutionary inference become central in the study of organic evolution. 2. Here, I present two different graphical ...
Carotenoid-based colors are thought to play an important signaling role in many animal taxa. However, little is known about evolutionary changes in carotenoid coloration, especially among closely related species. We used a phylogenetic perspective to examine carotenoid color changes within New World orioles (genus Icterus). Oriole color was quantitatively measured using reflectance spectrometry...
One of the main aims in phylogenetics is the estimation of ancestral sequences based on present-day data like, for instance, DNA alignments. One way to estimate the data of the last common ancestor of a given set of species is to first reconstruct a phylogenetic tree with some tree inference method and then to use some method of ancestral state inference based on that tree. One of the best-know...
Ancestral sequence reconstruction (ASR) is the calculation of ancient protein sequences on the basis of extant ones. It is most powerful in combination with the experimental characterization of the corresponding proteins. Such analyses allow for the study of problems that are otherwise intractable. For example, ASR has been used to characterize ancestral enzymes dating back to the Paleoarchean ...
We present a 6-gene, 420-species maximum-likelihood phylogeny of Ascomycota, the largest phylum of Fungi. This analysis is the most taxonomically complete to date with species sampled from all 15 currently circumscribed classes. A number of superclass-level nodes that have previously evaded resolution and were unnamed in classifications of the Fungi are resolved for the first time. Based on the...
The bacterial genomes of Thermotoga species show evidence of significant interdomain horizontal gene transfer from the Archaea. Members of this genus acquired many genes from the Thermococcales, which grow at higher temperatures than Thermotoga species. In order to study the functional history of an interdomain horizontally acquired gene we used ancestral sequence reconstruction to examine the ...
In this paper, we report on the discovery of hidden biodiversity genus Dendronotus (Gastropoda: Nudibranchia) in bathyal areas North Pacific (the Sea Okhotsk and Kuril Islands). We also test different scenarios expansion to deeper waters. An integrative analysis was implemented based morphological data (light microscopy SEM) molecular data, which included phylogenetic four markers (COI, 16S, H3...
anterior cruciate ligament (acl) reconstruction surgery has significantly evolved in recent years. this has led to development of new technologies that facilitate the diagnosis of acl injury and the application of state of the art methods for treatment. in particular, individualized anatomical acl reconstruction aims to restore native acl function. treatment is tailored to each patient based on...
Genome rearrangements are a valuable source of information about early evolution, as well as an important factor in speciation processes. Reconstruction of ancestral gene orders on a phylogeny is thus one of the crucial tools contributing to understanding of evolution of genome organization. For most models of evolution, this problem is NP-hard. We have developed a universal method for reconstr...
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