Trees within Trees: Genes and Species, Molecules and Morphology
نویسندگان
چکیده
منابع مشابه
Trees within trees: genes and species, molecules and morphology.
The construction and interpretation of gene trees is fundamental in molecular systematics. If the gene is defined in a historical (coalescent) sense, there can be multiple gene trees within the single contiguous set of nucleotides, and attempts to construct a single tree for such a sequence must deal with homoplasy created by conflict among divergent histories. On a larger scale, incongruence i...
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The availability of whole-genome sequence data has provided a rich resource of deep insights into many biological, medical and pharmaceutical problems and applications, and is promising even more. Yet, along with these insights and promises, genomic data have given rise to many challenging problems, mainly due to the quantity and heterogeneity of such data. One of these major challenges is the ...
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The association between two or more lineages over evolutionary time is a recurrent theme spanning several different fields within biology, from molecular evolution to coevolution and biogeography. In each `historical association', one lineage is associated with another, and can be thought of as tracking the other over evolutionary time with a greater or lesser degree of fidelity. Examples inclu...
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—Exploration of the relationship between gene trees and their containing species trees leads to consideration of how to reconstruct species trees from gene trees and of the concept of phylogeny as a cloud of gene histories. When gene copies are sampled from various species, the gene tree relating these copies might disagree with the species phylogeny. This discord can arise from horizontal tran...
متن کاملTangled trees: the challenge of inferring species trees from coalescent and noncoalescent genes.
Phylogenies based on different genes can produce conflicting phylogenies; methods that resolve such ambiguities are becoming more popular, and offer a number of advantages for phylogenetic analysis. We review so-called species tree methods and the biological forces that can undermine them by violating important aspects of the underlying models. Such forces include horizontal gene transfer, gene...
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ژورنال
عنوان ژورنال: Systematic Biology
سال: 1997
ISSN: 1076-836X,1063-5157
DOI: 10.1093/sysbio/46.3.537