Relaxed phylogenetics and dating with confidence drummond
“The Space of Ultrametric Phylogenetic Trees.” Journal of Theoretical Biology 403 (August): 197–208.
2016 “Phylodynamics with migration: A computational framework to quantify population structure from genomic data” Molecular Biology and Evolution Drummond, Alexei J., and Tanja Stadler. “Bayesian Phylogenetic Estimation of Fossil Ages.” Philosophical Transactions of the Royal Society of London.
In addition, the microfossil pollen record of Acacia is relatively rich and provides a good age constraint for the entire Acacia clade.
By using multiple reliable fossil constraints, we applied a combination of primary calibration points to produce a comprehensive study of divergence dates in Acacia s.s. Previous dating studies included very limited samples of the diversity of Australian Acacia and experienced difficulties in identifying appropriate age calibrations for the lineage, leading to considerable variation in their results.
This is not an indication of a security issue such as a virus or attack.
clade and for related lineages across the Mimosoideae subfamily.
Five decades have passed since the proposal of the molecular clock hypothesis, which states that the rate of evolution at the molecular level is constant through time and among species.
This hypothesis has become a powerful tool in evolutionary biology, making it possible to use molecular sequences to estimate the geological ages of species divergence events.
Although the methods used here do help to correct for lineage-specific heterogeneity in rates of molecular evolution (associated, for example, with evolutionary shifts in life history), we remain concerned that some such effects (e.g., the early radiation of herbaceous clades within angiosperms) may still be biasing our inferences.
Our understanding of the history of life depends critically on knowledge of the ages of major clades.