contain Our results indicate that the recent genome phylogeny may some erroneous
ID: 191132 • Letter: C
Question
contain Our results indicate that the recent genome phylogeny may some erroneous relationships induced by long branch attraction fromm parse taxon sampling. Maximum likelihood analysis of our sequence pruned down to a phylogenetically equivalent subsample of 48 species produces relationships along the neoavian 'backbone (Supplementary Fig. 8) that are entirely discordant with the phylogeny based on our full data set (Fig. 1). This reduced taxon analysis recovers iata some of the specific features of the recent genome phylogeny by Jarvis et al (Supplementary Fig, 8): for example, the placement of the pigeons, mesites, and sandgrouse (a subclade of Columbea) outside of the rest of the Neoaves. Differences in tree topology When taxa are excluded are to be expected if early internodes in Neoaves are very short. Adding taka that have diverged near nodes of interest has been theoretically demonstrated to constrain the possible historical substi ution patterns, and increase the accuracy of phylogenetic inference By increasing our táxor sampling to include all major avian lineages we have minimized the possibility that additional taxon sampling alone will alter the relationships in our tre.Explanation / Answer
Long branch attraction is a sort of taxonomic error or mistake committed during phylogenetic analysis in which distantly related lineages(organisms) are considered as closely related and are grouped together in a phylogenetic tree. The long branch attraction is a serious systematic problem because it leads to grouping together of unrelated lineages solely on the basis of genetic similarity and with considering ancestors.
In this study the possibility of long branch attraction has been minimized by evaluating large numbers of taxa for their relationship with each other.
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