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单词 evolutionary tree
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evolutionary tree
The pattern of historical relationships between species or other taxonomic groups resulting from divergence as a consequence of evolution or selective breeding; (also) a diagram or theoretical model of such relationships. Frequently with modifying word, as evolutionary tree, genealogical tree, phylogenetic tree, etc. Cf. also family tree n. 3.
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1792 J. S. Barr tr. Comte de Buffon Nat. Hist. V. 339 To give a clearer idea of the different kinds of dogs, of their degeneration in different climates, and of the mixture of their breed, I subjoin a kind of genealogical tree [Fr. arbre généalogique], in which all the different varieties may easily be distinguished. The shepherd's dog is the stock or body of the tree.
1817 W. Johnston tr. J. Beckmann Hist. Inventions & Disc. (ed. 3) IV. 268 We might form a genealogical tree of them [sc. the varieties or cultivars of Brassica oleracea]..; but a genealogical tree without proofs is as of little value in natural history as in claims for hereditary titles and estates.
1899 Science 29 Dec. 968/2 In a pictorial phylogenetic tree the type of the ganoid is given as the ‘gar-pike’.
1914 F. Rothwell tr. E. Boutroux Nat. Law in Sci. & Philos. x. 144 The followers of Lamarck and Darwin..are endeavouring to draw up the genealogical tree of species.
1992 Discover May 19/2 In a cladistic analysis, one tries to determine how a number of organisms are related and arrange them on the most plausible evolutionary tree—or cladogram..—by focusing on certain key characteristics.
2008 T. Audesirk et al. Biology (ed. 8) vii. 367/1 Notice the positions on the tree of the four human viruses (two strains of HIV-1 and two of HIV-2).
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