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• W2808002105 abstract "Working with high-dimensional phylogenetic comparative data sets is challenging because likelihood-based multivariate methods suffer from low statistical performances as the number of traits |$p $| approaches the number of species |$n $| and because some computational complications occur when |$p $| exceeds |$n$|⁠. Alternative phylogenetic comparative methods have recently been proposed to deal with the large |$p $| small |$n $| scenario but their use and performances are limited. Herein, we develop a penalized likelihood (PL) framework to deal with high-dimensional comparative data sets. We propose various penalizations and methods for selecting the intensity of the penalties. We apply this general framework to the estimation of parameters (the evolutionary trait covariance matrix and parameters of the evolutionary model) and model comparison for the high-dimensional multivariate Brownian motion (BM), Early-burst (EB), Ornstein-Uhlenbeck (OU), and Pagel’s lambda models. We show using simulations that our PL approach dramatically improves the estimation of evolutionary trait covariance matrices and model parameters when |$p$| approaches |$n$|⁠, and allows for their accurate estimation when |$p$| equals or exceeds |$n$|⁠. In addition, we show that PL models can be efficiently compared using generalized information criterion (GIC). We implement these methods, as well as the related estimation of ancestral states and the computation of phylogenetic principal component analysis in the R package RPANDA and mvMORPH. Finally, we illustrate the utility of the new proposed framework by evaluating evolutionary models fit, analyzing integration patterns, and reconstructing evolutionary trajectories for a high-dimensional 3D data set of brain shape in the New World monkeys. We find a clear support for an EB model suggesting an early diversification of brain morphology during the ecological radiation of the clade. PL offers an efficient way to deal with high-dimensional multivariate comparative data." @default.
• W2808002105 created "2018-06-21" @default.
• W2808002105 creator A5003425663 @default.
• W2808002105 creator A5041451540 @default.
• W2808002105 creator A5084776094 @default.
• W2808002105 date "2018-06-19" @default.
• W2808002105 modified "2023-09-29" @default.
• W2808002105 title "A Penalized Likelihood Framework for High-Dimensional Phylogenetic Comparative Methods and an Application to New-World Monkeys Brain Evolution" @default.
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