Validity of molecular phylogenetic trees for understanding morphological evolution
نویسندگان
چکیده
منابع مشابه
Understanding phylogenies: Constructing and Interpreting Phylogenetic trees
Interpretation of phylogenetic trees is fundamental in understanding the relationships between organisms, their traits or characteristics, their ecology and even their genomic and developmental biology. As trees appear more often in basic texts, many students, and even their teachers, clearly understand little of how they are constructed and even less about what can be inferred from them about ...
متن کاملEstimation of evolutionary distance for reconstructing molecular phylogenetic trees.
The most commonly used measure of evolutionary distance in molecular phylogenetics is the number of nucleotide substitutions per site. However, this number is not necessarily most efficient for reconstructing a phylogenetic tree. In order to evaluate the accuracy of evolutionary distance, D(t), for obtaining the correct tree topology, an accuracy index, A(t), was proposed. This index is defined...
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Using six plastid regions, we present a phylogeny for 26 species of the heterosporous fern genus Marsilea. Two well-supported groups within Marsilea are identified. Group I includes two subgroups, and is relatively species-poor. Species assignable to this group have glabrous leaves (although land leaves may have a few hairs), sporocarps lacking both a raphe and teeth, and share a preference for...
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How will the emerging possibility of inferring ultra-large phylogenies influence our ability to identify shifts in diversification rate? For several large angiosperm clades (Angiospermae, Monocotyledonae, Orchidaceae, Poaceae, Eudicotyledonae, Fabaceae, and Asteraceae), we explore this issue by contrasting two approaches: (1) using small backbone trees with an inferred number of extant species ...
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Within the biological sciences, phylogenetics has long been relegated to a selected sector of scientists interested in the evolutionary history of organisms. Recently, it has become widely accepted that molecular sequence data is best analyzed in a phylogenetic context if predictive statements are to be made concerning lineagebased relationships among genes in large gene families, origins of ge...
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ژورنال
عنوان ژورنال: PLANT MORPHOLOGY
سال: 1996
ISSN: 1884-4154,0918-9726
DOI: 10.5685/plmorphol.8.15