Annals of Applied Statistics
- Ann. Appl. Stat.
- Volume 11, Number 2 (2017), 1146-1168.
Lateral transfer in Stochastic Dollo models
Lateral transfer, a process whereby species exchange evolutionary traits through nonancestral relationships, is a frequent source of model misspecification in phylogenetic inference. Lateral transfer obscures the phylogenetic signal in the data as the histories of affected traits are mosaics of the overall phylogeny. We control for the effect of lateral transfer in a Stochastic Dollo model and a Bayesian setting. Our likelihood is highly intractable, as the parameters are the solution of a sequence of large systems of differential equations representing the expected evolution of traits along a tree. We illustrate our method on a data set of lexical traits in Eastern Polynesian languages, and obtain an improved fit over the corresponding model without lateral transfer.
Ann. Appl. Stat., Volume 11, Number 2 (2017), 1146-1168.
Received: January 2016
Revised: March 2017
First available in Project Euclid: 20 July 2017
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Kelly, Luke J.; Nicholls, Geoff K. Lateral transfer in Stochastic Dollo models. Ann. Appl. Stat. 11 (2017), no. 2, 1146--1168. doi:10.1214/17-AOAS1040. https://projecteuclid.org/euclid.aoas/1500537738
- Supplemental Materials: Lateral transfer in Stochastic Dollo models. The supplement contains a proof of Theorem 1 and supporting material for the analyses in Sections 7 and 8.