WASHINGTON, Dec. 11 (Xinhua) -- An international team led by Chinese researchers has sequenced the genomes of 48 species of birds to create the most reliable avian tree of life to date.
This massive project, which took more than four years to complete and involved hundreds of researchers from 20 different countries around the world, analyzed at least one genome from every major bird lineage, including the woodpecker, owl, penguin, hummingbird and flamingo, and produced dozens of reports, eight of which are published Thursday in Science.
The results "have enabled us to answer numerous fundamental questions to an unprecedented scale," said co-lead author Guojie Zhang of the National Genebank at BGI in China and the University of Copenhagen.
"This is the largest whole genomic study across a single vertebrate class to date. The success of this project can only be achieved with the excellent collaboration of all the consortium members," Zhang said.
The findings supported a "big bang" theory for the evolutionary expansion of birds during the 10 to 15 million years that followed a mass extinction event about 66 million years ago that killed off all dinosaurs except some birds.
This contradicted the idea that birds blossomed 10 to 80 million years earlier before the mass extinction event, as some recent studies suggested.
This massive project, which took more than four years to complete and involved hundreds of researchers from 20 different countries around the world, analyzed at least one genome from every major bird lineage, including the woodpecker, owl, penguin, hummingbird and flamingo, and produced dozens of reports, eight of which are published Thursday in Science.
The results "have enabled us to answer numerous fundamental questions to an unprecedented scale," said co-lead author Guojie Zhang of the National Genebank at BGI in China and the University of Copenhagen.
"This is the largest whole genomic study across a single vertebrate class to date. The success of this project can only be achieved with the excellent collaboration of all the consortium members," Zhang said.
The findings supported a "big bang" theory for the evolutionary expansion of birds during the 10 to 15 million years that followed a mass extinction event about 66 million years ago that killed off all dinosaurs except some birds.
This contradicted the idea that birds blossomed 10 to 80 million years earlier before the mass extinction event, as some recent studies suggested.