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Undersampling Taxa Will Underestimate Molecular Divergence Dates : An Example from the South American Lizard Clade Liolaemini
المؤلف
المصدر
International Journal of Evolutionary Biology
العدد
المجلد 2013، العدد 2013 (31 ديسمبر/كانون الأول 2013)، ص ص. 1-12، 12ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2013-10-09
دولة النشر
مصر
عدد الصفحات
12
التخصصات الرئيسية
الملخص EN
Methods for estimating divergence times from molecular data have improved dramatically over the past decade, yet there are few studies examining alternative taxon sampling effects on node age estimates.
Here, I investigate the effect of undersampling species diversity on node ages of the South American lizard clade Liolaemini using several alternative subsampling strategies for both time calibrations and taxa numbers.
Penalized likelihood (PL) and Bayesian molecular dating analyses were conducted on a densely sampled (202 taxa) mtDNA-based phylogenetic hypothesis of Iguanidae, including 92 Liolaemini species.
Using all calibrations and penalized likelihood, clades with very low taxon sampling had node age estimates younger than clades with more complete taxon sampling.
The effect of Bayesian and PL methods differed when either one or two calibrations only were used with dense taxon sampling.
Bayesian node ages were always older when fewer calibrations were used, whereas PL node ages were always younger.
This work reinforces two important points: (1) whenever possible, authors should strongly consider adding as many taxa as possible, including numerous outgroups, prior to node age estimation to avoid considerable node age underestimation and (2) using more, critically assessed, and accurate fossil calibrations should yield improved divergence time estimates.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Schulte, James A.. 2013. Undersampling Taxa Will Underestimate Molecular Divergence Dates : An Example from the South American Lizard Clade Liolaemini. International Journal of Evolutionary Biology،Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-486390
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Schulte, James A.. Undersampling Taxa Will Underestimate Molecular Divergence Dates : An Example from the South American Lizard Clade Liolaemini. International Journal of Evolutionary Biology No. 2013 (2013), pp.1-12.
https://search.emarefa.net/detail/BIM-486390
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Schulte, James A.. Undersampling Taxa Will Underestimate Molecular Divergence Dates : An Example from the South American Lizard Clade Liolaemini. International Journal of Evolutionary Biology. 2013. Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-486390
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-486390
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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