Developmental plasticity, morphological variation and evolvability: a multilevel analysis of morphometric integration in the shape of compound leaves

Journal of Evolutionary Biology - Tập 25 Số 1 - Trang 115-129 - 2012
Christian Peter Klingenberg1, Sascha H. Duttke2, Simon Whelan1, Minsoo Kim1
1Faculty of Life Sciences, University of Manchester, Manchester, UK
2Present address: Section of Molecular Biology, University of California at San Diego, La Jolla, CA, USA.

Tóm tắt

AbstractThe structure of compound leaves provides flexibility for morphological change by variation in the shapes, sizes and arrangement of leaflets. Here, we conduct a multilevel analysis of shape variation in compound leaves to explore the developmental plasticity and evolutionary potential that are the basis of diversification in leaf shape. We use the methods of geometric morphometrics to study the shapes of individual leaflets and whole leaves in 20 taxa ofPotentilla(sensu lato). A newly developed test based on the bootstrap approach suggests that uncertainty in the molecular phylogeny precludes firm conclusions whether there is a phylogenetic signal in the data on leaf shape. For variation among taxa, variation within taxa, as well as fluctuating asymmetry, there is evidence of strong morphological integration. The patterns of variation are similar across all three levels, suggesting that integration within taxa may act as a constraint on evolutionary change.

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