A rapid loss of stripes : the evolutionary history of the extinct quagga.

• Twenty years ago, the field of ancient DNA was launched with the publication of two short mitochondrial (mt) DNA sequences from a single quagga (Equus quagga) museum skin, an extinct South African equid (Higuchi et al. 1984 Nature312, 282-284). This was the first extinct species from which genetic information was retrieved. The DNA sequences of the quagga showed that it was more closely related to zebras than to horses. However, quagga evolutionary history is far from clear. We have isolated DNA from eight quaggas and a plains zebra (subspecies or phenotype Equus burchelli burchelli). We show that the quagga displayed little genetic diversity and very recently diverged from the plains zebra, probably during the penultimate glacial maximum. This emphasizes the importance of Pleistocene climate changes for phylogeographic patterns in African as well as Holarctic fauna.

Ämnesord

NATURVETENSKAP  -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)

Nyckelord

Adaptation; Biological/*physiology

Africa

Animals

Base Sequence

Climate

DNA; Mitochondrial/*genetics/history

Equidae/*classification/genetics/physiology

Extinction; Biological

History; Ancient

Molecular Sequence Data

Phylogeny

Species Specificity

Cell and molecular biology

Cell- och molekylärbiologi

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)