Genome Size: A Novel Genomic Signature in Support of Afrotheria |
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Authors: | Carlo Alberto Redi Silvia Garagna Maurizio Zuccotti Ernesto Capanna |
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Institution: | (1) Fondazione IRCCS Policlinico San Matteo, Pavia, Italy;(2) Dipartimento di Biologia Animale, Laboratorio di Biologia dello Sviluppo, Piazza Botta 9, 27100 Pavia, Italy;(3) Dipartimento di Medicina Sperimentale, Universitì di Parma, Parma, Italy;(4) Dipartimento di Biologia Animale e dell’Uomo, Universitì “La Sapienza”, Roma, Italy |
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Abstract: | Molecular phylogenetic analyses suggest an emerging phylogeny for the extant Placentalia (eutherian) that radically departs
from morphologically based constructions of the past. Placental mammals are partitioned into four supraordinal clades: Afrotheria,
Xenarthra, Laurasiatheria, and Euarchontoglires. Afrotheria form an endemic African clade that includes elephant shrews, golden
moles, tenrecs, aardvarks, hyraxes, elephants, dugongs, and manatees. Datamining databases of genome size (GS) shows that
till today just one afrotherian GS has been evaluated, that of the aardvark Orycteropus afer. We show that the GSs of six selected representatives across the Afrotheria supraordinal group are among the highest for
the extant Placentalia, providing a novel genomic signature of this enigmatic group. The mean GS value of Afrotheria, 5.3
± 0.7 pg, is the highest reported for the extant Placentalia. This should assist in planning new genome sequencing initiatives.
Reviewing Editor: Dmitri Petrov] |
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Keywords: | Genome size Mammals Afrotheria Xenarthra Laurasiatheria Euarchontoglires |
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