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PHENIX: An R package to estimate a size-controlled phenotypic integration index
Rubén Torices1, A Jesús Muñoz-Pajares2
1Centro de Ecologia Funcional, Universidade de Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal ; Departamento de Ecología Funcional y Evolutiva, Estación Experimental de Zonas Áridas (EEZA-CSIC), Carretera de Sacramento s/n, 04120 La Cañada de San Urbano, Almería, Spain.
This study introduces PHENIX, an R package for analyzing phenotypic integration. It provides tools to accurately measure and statistically test trait correlations while controlling for body size effects.
Area of Science:
- Evolutionary biology
- Quantitative genetics
Background:
- Phenotypic integration describes interdependencies among organismal traits.
- Accurately measuring phenotypic integration while accounting for size is a significant challenge in evolutionary studies.
Purpose of the Study:
- To introduce PHENIX, an R package designed to facilitate the estimation and statistical testing of size-controlled phenotypic integration.
- To provide researchers with accessible tools for analyzing complex trait relationships.
Main Methods:
- Development of an R package (PHENIX) offering functions for size-controlled phenotypic integration index estimation.
- Implementation of bootstrapping for confidence intervals and randomization for null distribution simulation and significance testing.
Main Results:
- The PHENIX package provides functions to estimate phenotypic integration, effectively controlling for a third variable like organ size.
- It includes methods for robust statistical assessment of integration magnitude.
Conclusions:
- PHENIX offers a practical solution for researchers to estimate and statistically validate phenotypic integration, crucially incorporating size-corrected analyses.
- The package supports widely used methodological approaches in evolutionary and quantitative genetics.
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