Relaxed phylogenies and dating with confidence dating site for kids under 13
At around the same time, Sanderson (1997) published his nonparametric rate-smoothing algorithm, which operates by minimizing the magnitude of rate changes between adjacent branches in the tree.
Another species of interest is Strigocuscus celebensis, whose morphologically based taxonomic affinity has habitually been with trichosurins. This study uses nuclear sequence data from the breast cancer and ovarian cancer susceptibility gene 1 (BRCA1) to test previous mitochondrial DNA results and uses relaxed molecular clock methods to estimate divergence dates. celebensis and this clade as sister to Phalangerini.
There is now a general appreciation that the procedure of divergence dating is considerably more complex than that initially described in the 1960s by Zuckerkandl and Pauling (1962, 1965).
In particular, there has been much critical attention toward the assumption of a global molecular clock, resulting in the development of increasingly sophisticated techniques for inferring divergence times from sequence data.
Characterization of the living species of cuscus (Marsupialia: Phalangeridae).
(Surrey Beatty & the Royal Zoological Society of New South Wales: Sydney.) (1987).