Inferring Speciation Times under an Episodic Molecular Clock
نویسندگان
چکیده
منابع مشابه
Inferring speciation times under an episodic molecular clock.
We extend our recently developed Markov chain Monte Carlo algorithm for Bayesian estimation of species divergence times to allow variable evolutionary rates among lineages. The method can use heterogeneous data from multiple gene loci and accommodate multiple fossil calibrations. Uncertainties in fossil calibrations are described using flexible statistical distributions. The prior for divergenc...
متن کاملInferring Speciation Tunes under an Episodic Molecular Clock
— We extend our recently developed Markov chain Monte Carlo algorithm for Bayesian estimation of species divergence times to allow variable evolutionary rates among lineages. The method can use heterogeneous data from multiple gene loci and accommodate multiple fossil calibrations. Uncertainties in fossil calibrations are described using flexible statistical distributions. The prior for diverge...
متن کاملR8s: Inferring Absolute Rates of Molecular Evolution, Divergence times in the Absence of a Molecular Clock
SUMMARY Estimating divergence times and rates of substitution from sequence data is plagued by the problem of rate variation between lineages. R8s version 1.5 is a program which uses parametric, nonparametric and semiparametric methods to relax the assumption of constant rates of evolution to obtain better estimates of rates and times. Unlike most programs for rate inference or phylogenetics, r...
متن کاملEstimating metazoan divergence times with a molecular clock.
Accurately dating when the first bilaterally symmetrical animals arose is crucial to our understanding of early animal evolution. The earliest unequivocally bilaterian fossils are approximately 555 million years old. In contrast, molecular-clock analyses calibrated by using the fossil record of vertebrates estimate that vertebrates split from dipterans (Drosophila) approximately 900 million yea...
متن کاملEstimating divergence times in phylogenetic trees without a molecular clock.
were nonstationary at first positions for the ingroup at P = 0.01 using the chi-square test in PAUP*. The chi-square test in PAUP∗ appears to do a good job of identifying the worst offenders and although crude, is effective for a large data set when analyzing individual genes. We certainly anticipate that as more refined tests of stationarity are implemented (e.g., Foster, 2004), discrimination...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Systematic Biology
سال: 2007
ISSN: 1063-5157,1076-836X
DOI: 10.1080/10635150701420643