Canine Science Briefs
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By Caroline Coile Ph.D.
New Canine Genome Unveiled
The initial dog genome was released in 2000. Now a new and improved dog genome has been developed using new DNA sequencing methods. The new technology has reduced the number of genome gaps from more than 23,000 to just 585.
The improved genome will help disease research not only in dogs, but in humans as more direct comparison can be made between the two species diseases and DNA.
The new dog reference genome and annotation, GSD_1.0, is available publicly for download (DDBJ/ENA/GenBank: JAAHUQ000000000) or for online browsing via UCSC and Ensembl.
Chao Wang, et al. A novel canine reference genome resolves genomic architecture and uncovers transcript complexity. Communications Biology, 2021; 4 (1) DOI: 10.1038/s42003-021-01698-x
Ancient Canine Diversity
A global study of ancient dog DNA led by scientists from more than 10 countries found evidence that there were different types of dogs more than 11,000 years ago in the period immediately following the Ice Age.
By analyzing ancient DNA from skeletal material from 27 dogs, some of which lived up to nearly 11,000 years ago, across Europe, the Near East and Siberia, they found there were already at least five different types of dog with distinct genetic ancestries. Note that at this time no other species was domesticated. This ancient diversity occurred when all humans were still hunters and gatherers.
This finding reveals that the diversity observed between dogs in different parts of the world today originated when all humans were still hunters and gatherers. These early lineages have since mixed and migrated to give rise to the dogs of today.
Anders Bergström, et al. Origins and genetic legacy of prehistoric dogs. Science, 2020 DOI: 10.1126/science.aba9572
Sledge Dogs Originated Earlier Than Previously Thought
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Short URL: https://caninechronicle.com/?p=198087
Posted by AnthonyA
on Mar 22 2021. Filed under Current Articles, Featured.
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