Sentences with phrase «phylogenetic branch»

cladistic species concept: The concept of species, according to which a species is a lineage of populations between two phylogenetic branch points (or speciation events).

Although that approach has been successfully used to decipher relations between organisms, calibrating it to measure the time elapsed since the divergence of phylogenetic branches is problematic; concerning the early evolution of life, there is no generally accepted approach.

Major superphyla groups and Chordata phylum are labeled vertically near the roots of their phylogenetic branches and bilaterian lineages (Bilateria) are highlighted in yellow.

Not exact matches

To better understand how frogs evolved, scientists created a new phylogenetic tree — a branching diagram of evolutionary relationships — using data from hundreds of frog genomes.

«The key is having a phylogenetic tree to understand how these species are related to one another and the amount of time that has taken place between different evolutionary branching events,» said lead author Will Gearty, a graduate student at Stanford Earth.

The relationships between the various cancerous cells from a single person can be plotted out in much the same way as evolutionary biologists plot relationships between species: by drawing phylogenetic trees, branching diagrams that trace «descendants» back to a common ancestor.

Nevertheless, the eukaryotic stem on the phylogenetic tree of life spawns many branches before one gets to the split that separates the ancestors of plants from the ancestors of animals, which seems to have happened more than a billion years ago.

Each circle represents a phylogenetic node whose branching pattern suggests rapid expansion.

It also allowed the researchers to use phylogenetic software to pinpoint when Palmophyllales branched off from related plant species.

Although TMAdV retains the core genomic features common to all adenoviruses (Fig. 2C), phylogenetic analysis clearly places TMAdV within a separate branch, with no closely related neighbors (Figs. 3 and S1).

Future work, including new discoveries, will hopefully increase branch support for the phylogenetic arrangement of Pan-Inia (and basal inioids), and better refine this scenario for South American inioid evolution, and elsewhere.

The branch uniting the fungi and animals is well - supported based on a number of molecular phylogenetic datasets, including the nuclear small subunit ribosomal RNA gene (Wainwright et al., 1993; Bruns et al. 1993), unique and shared sequence insertions in proteins such as elongation factor 1α (Baldauf and Palmer, 1993), entire mitochondrial genomes (Lang et al., 2002), and concatenated protein - coding genes (Steenkamp et al., 2006).

Following in the footsteps of Charles Darwin, they grow phylogenetic trees — branching diagrams that depict lines of evolutionary descent back to a common ancestor.

We define phylogenetic strata as the deepest node in the branch at which at least one detectable homolog is present, where a detectable homolog is defined as a blastp hit where the alignment covers at least 50 % of the shorter protein with at least 30 % positives.

To further determine the evolutionary relationship of metazoan Boule homologs, we performed phylogenetic analysis of Boule homologs from the major animal branches, together with homologs of the other members of the DAZ family, Dazl and DAZ (Figure 2B and 2C).

Some of these genomes were even found to merit a new phylogenetic classification — a whole new branch of bacteria in the family tree of life — named PER or Peregrine.

(B) Phylogenetic treatment of homologs from major metazoan branches of human DAZ gene family members (BOULE, DAZL and DAZ) using conserved RRM domains.

These landrace dogs were the initial branches of the vast and mysterious phylogenetic tree the leaves of which are all of today's dog breeds — from chihuahuas to poodles to huskies.

The maternal wolf sequence that contributed to these breeds has not been matched across Eurasia [3] and its branch on the phylogenetic tree is rooted in the same sequence as the 33,000 year - old Altai dog (not a direct ancestor).