Relationships between gene trees and species trees.
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ID: 291565
1988
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Abstract
It is well known that a phylogenetic tree (gene tree) constructed from DNA sequences for a genetic locus does not necessarily agree with the tree that represents the actual evolutionary pathway of the species involved (species tree). One of the important factors that cause this difference is genetic polymorphism in the ancestral species. Under the assumption of neutral mutations, this problem can be studied by evaluating the probability (P) that a gene tree has the same topology as that of the species tree. When one gene (allele) is used from each of the species involved, the probability can be expressed as a simple function of Ti = ti/(2N), where ti is the evolutionary time measured in generations for the ith internodal branch of the species tree and N is the effective population size. When any of the Ti's is less than 1, the probability P becomes considerably less than 1.0. This probability cannot be substantially increased by increasing the number of alleles sampled from a locus. To increase the probability, one has to use DNA sequences from many different loci that have evolved independently of each other.
| Reference Key |
openalex_W2142718629
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| Authors | Pekka Pamilo, M Nei |
| Journal | molecular biology and evolution |
| Year | 1988 |
| DOI |
10.1093/oxfordjournals.molbev.a040517
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| URL | |
| Keywords | Keywords not found |
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