Long branch attraction - Revision history

Christoph at 04:51, 13 September 2006

2006-09-13T04:51:35Z

Christoph at 04:47, 13 September 2006

2006-09-13T04:47:01Z

Christoph: added more info. + refs

2005-12-31T01:43:26Z

added more info. + refs

Christoph: Started article

2005-12-30T02:24:59Z

Started article

New page

'''Long branch attraction''' (LBA) is a phenomenon in [[phylogenetic]] analyses (most commonly those employing [[maximum parsimony]]) when rapidly evolving lineages are inferred to be closely related, regardless of their true [[evolution|evolutionary]] relationships. The problem arises when the [[DNA]] of two (or more) lineages evolves rapidly. There are only four possible [[nucleotides]] and when [[mutation|DNA substitution]] rates are high, the probability that two lineages will independently evolve the same nucleotide at the same site increases. When this happens, parsimony erroneously interprets this similarity as a [[synapomorphy]] (i.e., evolving once in the common ancestor of the two lineages).

This problem can be minimized by using methods that incorporate differential rates of substitution among lineages (e.g., maximum likeihood).

== See also ==
* [[Maximum parsimony]]

== References ==
* Felsenstein J (2004). Inferring Phylogenies. ''Sinauer Associates'' (Sunderland, MA).

== External links ==
* [http://en.wikipedia.org/wiki/Long_branch_attraction Wikipedia article on '''Long branch attraction''']

[[Category:Academic Research]]
[[Category:Phylogenetics]]

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 * [http://en.wikipedia.org/wiki/Long_branch_attraction Wikipedia article on '''Long branch attraction''']
 [[Category:Academic Research]]
 [[Category:Phylogenetics]]

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-'''Long branch attraction''' (LBA) is a phenomenon in [[phylogenetic]] analyses (most commonly those employing [[maximum parsimony]]) when rapidly evolving lineages are inferred to be closely related, regardless of their true [[evolution|evolutionary]] relationships. The problem arises when the [[DNA]] of two (or more) lineages evolves rapidly.  There are only four possible [[nucleotides]] and when [[mutation|DNA substitution]] rates are high, the probability that two lineages will independently evolve the same nucleotide at the same site increases. When this happens, parsimony erroneously interprets this similarity as a [[synapomorphy]] (i.e., evolving once in the common ancestor of the two lineages).
+'''Long branch attraction''' ('''LBA''') is a phenomenon in [[phylogenetic]] analyses (most commonly those employing [[maximum parsimony]]) when rapidly evolving lineages are inferred to be closely related, regardless of their true [[evolution|evolutionary]] relationships. The problem arises when the [[DNA]] of two (or more) lineages evolves rapidly.  There are only four possible [[nucleotides]] and when [[mutation|DNA substitution]] rates are high, the probability that two lineages will independently evolve the same nucleotide at the same site increases. When this happens, parsimony erroneously interprets this similarity as a [[synapomorphy]] (i.e., evolving once in the common ancestor of the two lineages).
-This problem can be minimized by using methods that incorporate differential rates of substitution among lineages (e.g., maximum likeihood).
+This problem can be minimized by using methods that incorporate differential rates of substitution among lineages (e.g., [[maximum likeihood]]).
 == See also ==
 * [[Maximum parsimony]]
 == References ==
-* Felsenstein J (2004). Inferring Phylogenies. ''Sinauer Associates'' (Sunderland, MA).
+* Felsenstein J (2004). ''Inferring Phylogenies''. Sinauer Associates (Sunderland, MA).
 == External links ==