Defining the limits of taxonomic conservatism in host-plant use for phytophagous insects: Molecular systematics and evolution of host-plant associations in the seed-beetle genus Bruchus Linnaeus (Coleoptera: Chrysomelidae: Bruchinae)

Gaël J. Kergoat, Jean François Silvain, Alex Delobel, Midori Tuda, Klaus Werner Anton

研究成果: Contribution to journalArticle査読

38 被引用数 (Scopus)

抄録

In this study, we have investigated the limits of taxonomic conservatism in host-plant use in the seed-beetle genus Bruchus. To reconstruct the insect phylogeny, parsimony and multiple partitioned Bayesian inference analyses were conducted on a combined data set of four genes. Permutation tests and both global and local maximum-likelihood optimizations of host preferences at distinct taxonomic levels revealed that host-fidelity is still discernible beyond the host-plant tribe level, suggesting the existence of more important than previously thought evolutionary constraints, which are further discussed in details. Our tree topologies are also mostly consistent with extant taxonomic groups. Through the analysis of this empirical data set we also provide meaningful insights on two methodological issues. First, Bayesian inference analyses suggest that partitioning by using codon positions greatly increase the accuracy of phylogenetical reconstructions. Regarding reconstruction of ancestral character states through maximum likelihood, the present study also highlights the usefulness of local optimizations. The issue of over-parameterization is also addressed, as the optimizations with the most parameter-rich models have returned the most counterintuitive results.

本文言語英語
ページ(範囲)251-269
ページ数19
ジャーナルMolecular Phylogenetics and Evolution
43
1
DOI
出版ステータス出版済み - 4 2007

All Science Journal Classification (ASJC) codes

  • 生態、進化、行動および分類学
  • 分子生物学
  • 遺伝学

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