Comparing Covariance Matrices by Relative Eigenanalysis, with Applications to Organismal Biology
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Abstract
Most biologists are familiar with principal component analysis as an ordination tool for questions about within-group or between-group variation in systems of quantitative traits, and with multivariate analysis of variance as a tool for one useful description of the latter in the context of the former. Less familiar is the mathematical approach of relative eigenanalysis of which both of these are special cases: computing linear combinations for which two variance–covariance patterns have maximal ratios of variance. After reviewing this common algebraic–geometric core, we demonstrate the effectiveness of this exploratory approach in studies of developmental canalization and the identification of divergent and stabilizing selection. We further outline a strategy for statistical classification when group differences in variance dominate over differences in group averages.
Keywords
Classification Covariance matrix Developmental canalization Morphometrics Natural selection Principal component analysisNotes
Acknowledgments
This research was supported by the Focus of Excellence grant “Biometrics of EvoDevo” from the Faculty of Life Sciences, University of Vienna, to Philipp Mitteroecker, and Grant DEB-1019583 to Fred Bookstein and Joseph Felsenstein from the National Sciences Foundation of the United States. We thank Katharina Puschnig for drawing the skull used in Figs. 6 and 8.
References
- Anderson, T. W. (1958). An introduction to multivariate statistical analysis. New York: Wiley.Google Scholar
- Anderson, T. W. (1963). Asymptotic theory for principal component analysis. The Annals of Mathematical Statistics, 34, 122–148.CrossRefGoogle Scholar
- Atchley, W., & Rutledge, J. (1980). Genetic components of size and shape. I. Dynamics of components of phenotypic variability and covariablity during ontogeny in the laboratory rat. Evolution, 34, 1161–1173.CrossRefGoogle Scholar
- Badyaev, A. V., & Foresman, K. R. (2004). Evolution of morphological integration. I. Functional units channel stress-induced variation in shrew mandibles. The American Naturalist, 163, 868–879.PubMedCrossRefGoogle Scholar
- Bookstein, F. L. (1991). Morphometric tools for landmark data: Geometry and biology. Cambridge: Cambridge University Press.Google Scholar
- Bookstein, F. L. (2014). Measuring and reasoning: Numerical inferences in the sciences. Cambridge: Cambridge University Press.Google Scholar
- Bookstein, F.L., Connor, P.D., Huggins, J.E., Barr, H. M., Pimentel, K. D., & Streissguth, A. P. (2007). Many infants prenatally exposed to high levels of alcohol show one particular anomaly of the corpus callosum. Alcoholism: Clinical and Experimental Research, 31, 868–879.CrossRefGoogle Scholar
- Bookstein, F. L., Streissguth, A. P., Sampson, P. D., Connor, P. D., & Bar, H. M. (2002). Corpus callosum shape and neuropsychological deficits in adult males with heavy fetal alcohol exposure. Neuroimage, 15, 233–251.PubMedCrossRefGoogle Scholar
- Cheverud, J. M. (1988). A comparison of genetic and phenotypic correlations. Evolution, 42, 958–968.CrossRefGoogle Scholar
- Coquerelle, M., Bookstein, F. L., Braga, J., Halazonetis, D. J., Weber, G. W., & Mitteroecker, P. (2011). Sexual dimorphism of the human mandible and its association with dental development. American Journal of Physical Anthropology, 145, 192–202.PubMedCrossRefGoogle Scholar
- Debat, V., & David, P. (2001). Mapping phenotypes: Canalization, plasticity and developmental stability. Trends in Ecology & Evolution, 16, 555–561.CrossRefGoogle Scholar
- Falconer, D. S., & Mackay, T. F. C. (1996). Introduction to quantitative genetics. Essex: Longman.Google Scholar
- Felsenstein, J. (1985). Phylogenies and the comparative method. American Naturalist, 125, 1–15.CrossRefGoogle Scholar
- Felsenstein, J. (1988). Phylogenies and quantitative characters. Annual Review of Ecology, Evolution, and Systematics, 19, 445–471.CrossRefGoogle Scholar
- Flury, B. N. (1983). Some relations between the comparison of covariance matrices and principal component analysis. Computational Statistics & Data Analysis, 1, 97–109.CrossRefGoogle Scholar
- Flury, B. N. (1985). Analysis of linear combinations with extreme ratios of variance. Journal of the American Statistical Association, 80, 915–922.CrossRefGoogle Scholar
- Förstner W., & Moonen, B. (1999). A metric for covariance matrices. In: F. Krumm, V. S. Schwarze (Eds.), Quo vadis geodesia ...?, Festschrift for Erik W. Grafarend on the occasion of his 60th birthday. Stuttgart: Stuttgart University.Google Scholar
- Gibson, G., & Wagner, G. (2000). Canalization in evolutionary genetics: A stabilizing theory? Bioessays, 22, 372–380.Google Scholar
- Hallgrimsson, B., Brown, J. J., Ford-Hutchinson, A. F., Sheets, H. D., Zelditch, M. L., & Jirik, F. R. (2006). The brachymorph mouse and the developmental-genetic basis for canalization and morphological integration. Evolution & Development, 8, 61–73.CrossRefGoogle Scholar
- Hallgrimsson, B., & Hall, B. K. (2005). Variation: A central concept in biology. New York: Elsevier Academic Press.Google Scholar
- Hallgrimsson, B., Willmore, K., & Hall, B. K. (2002). Canalization, developmental stability, and morphological integration in primate limbs. American Journal of Physical Anthropology Supplement, 35, 131–158.CrossRefGoogle Scholar
- Hansen, T. F., & Houle, D. (2008). Measuring and comparing evolvability and constraint in multivariate characters. Journal of Evolutionary Biology, 21, 1201–1219.PubMedCrossRefGoogle Scholar
- Houle, D., & Fierst, J. (2013). Properties of spontaneous mutational variance and covariance for wing size and shape in Drosophila melanogaster. Evolution, 67, 1116–1130.PubMedCrossRefGoogle Scholar
- Howells, W. W. (1996). Howells craniometric data on the internet. American Journal of Physical Anthropology, 101, 441–442.PubMedCrossRefGoogle Scholar
- Huttegger, S., & Mitteroecker, P. (2011). Invariance and meaningfulness in phenotype spaces. Evolutionary Biology, 38, 335–352.CrossRefGoogle Scholar
- Klingenberg, C. P., Debat, V., & Roff, D. A. (2010). Quantitative genetics of shape in cricket wings: Developmental integration in a functional structure. Evolution, 64, 2935–2951.PubMedGoogle Scholar
- Koots, K. R., & Gibson, J. P. (1996). Realized sampling variances of estimates of genetic parameters and the difference between genetic and phenotypic correlations. Genetics, 143:1409–1416.PubMedCentralPubMedGoogle Scholar
- Lande, R. (1979). Quantitative genetic analysis of multivariate evolution, applied to brain: Body size allometry. Evolution, 33, 402–416.CrossRefGoogle Scholar
- Manly, B. F. J., & Rayner, J. C. W. (1987). The comparison of sample covariance matrices using likelihood ratio tests. Biometrika, 74, 841–847.CrossRefGoogle Scholar
- Mardia, K. V., Kent, J. T., & Bibby, J. M. (1979). Multivariate analysis. London: Academic Press.Google Scholar
- Martin, G., Chapuis, E., & Goudet, J. (2008). Multivariate QST-FST comparisons: A neutrality test for the evolution of the g matrix in structured populations. Genetics, 180, 2135–2149.PubMedCentralPubMedCrossRefGoogle Scholar
- Mitteroecker, P. (2009). The developmental basis of variational modularity: Insights from quantitative genetics, morphometrics, and developmental biology. Evolutionary Biology, 36, 377–385.CrossRefGoogle Scholar
- Mitteroecker, P., & Bookstein, F. L. (2009). The ontogenetic trajectory of the phenotypic covariance matrix, with examples from craniofacial shape in rats and humans. Evolution, 63, 727–737.PubMedCrossRefGoogle Scholar
- Mitteroecker, P., & Bookstein, F. L. (2011). Classification, linear discrimination, and the visualization of selection gradients in modern morphometrics. Evolutionary Biology, 38, 100–114.CrossRefGoogle Scholar
- Mitteroecker, P., Gunz, P., Neubauer, S., & Müller, G. B. (2012). How to explore morphological integration in human evolution and development? Evolutionary Biology, 39, 536–553.CrossRefGoogle Scholar
- Mitteroecker, P., & Huttegger, S. (2009). The concept of morphospaces in evolutionary and developmental biology: Mathematics and metaphors. Biological Theory, 4, 54–67.CrossRefGoogle Scholar
- Morrison, D. F. (1976). Multivariate statistical methods. New York: McGraw-Hill.Google Scholar
- Nonaka, K., & Nakata, M. (1984). Genetic variation and craniofacial growth in inbred rats. Journal of Craniofacial Genetics and Developmental Biology, 4, 271–302.PubMedGoogle Scholar
- Philipps, P. C., & Arnold, S. J. (1989). Visualizing multivariate selection. Evolution, 43, 1209–1222.CrossRefGoogle Scholar
- Rao, C. R. (1948). The utilization of multiple measurements in problems of biological classification. Journal of the Royal Statistical Society. Series B, 10, 159–203.Google Scholar
- Roff, D. (1995). The estimation of genetic correlations from phenotypic correlations: A test of Cheverud’s conjecture. Heredity, 74, 481–490.CrossRefGoogle Scholar
- Roff, D. (2000). The evolution of the G matrix: Selection or drift? Heredity (Edinb), 84, 135–142.CrossRefGoogle Scholar
- Smith, S. T. (2005). Covariance, subspace, and intrinsic Cramer-Rao bounds. IEEE Transactions on Signal Processing, 53, 1610–1630.CrossRefGoogle Scholar
- Tanner, J. M. (1963). Regulation of growth in size in mammals. Nature, 199, 845–850.PubMedCrossRefGoogle Scholar
- Tyler, D. E., Critchley, F., Dümbgen, L., & Oja, H. (2009). Invariant co-ordinate selection. Journal of the Royal Statistical Society: Series B, 71, 549–592.CrossRefGoogle Scholar
- Zelditch, M. L., Bookstein, F. L., & Lundrigan, B. (1992). Ontogeny of integrated skull growth in the cotton rat Sigmodon fulviventer. Evolution, 46, 1164–1180.CrossRefGoogle Scholar
- Zelditch, M. L., Lundrigan, B. L., & Garland, T. (2004). Developmental regulation of skull morphology. I. Ontogenetic dynamics of variance. Evolution & Development, 6, 194–206.CrossRefGoogle Scholar
- Zelditch, M. L., Mezey, J. G., Sheets, H. D., Lundrigan, B. L., & Garland, T. (2006). Developmental regulation of skull morphology II: Ontogenetic dynamics of covariance. Evolution & Development, 8, 46–60.CrossRefGoogle Scholar