کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4496125 1623850 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Majority rule has transition ratio 4 on Yule trees under a 2-state symmetric model
ترجمه فارسی عنوان
قانون اکثریت، نرخ انتقال 4 درختان یول در زیر مدل متقارن دو حالت است
کلمات کلیدی
یول درخت تولد خالص، روند مارکوف، دولت اجدادی، از دست دادن اطلاعات
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی

Inferring the ancestral state at the root of a phylogenetic tree from states observed at the leaves is a problem arising in evolutionary biology. The simplest technique – majority rule – estimates the root state by the most frequently occurring state at the leaves. Alternative methods – such as maximum parsimony - explicitly take the tree structure into account. Since either method can outperform the other on particular trees, it is useful to consider the accuracy of the methods on trees generated under some evolutionary null model, such as a Yule pure-birth model. In this short note, we answer a recently posed question concerning the performance of majority rule on Yule trees under a symmetric 2-state Markovian substitution model of character state change. We show that majority rule is accurate precisely when the ratio of the birth (speciation) rate of the Yule process to the substitution rate exceeds the value 4. By contrast, maximum parsimony has been shown to be accurate only when this ratio is at least 6. Our proof relies on a second moment calculation, coupling, and a novel application of a reflection principle.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Theoretical Biology - Volume 360, 7 November 2014, Pages 315–318
نویسندگان
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