'Tree Of Life' Has Lost A Branch, According To Largest Genetic Comparison Of Higher Life Forms Ever
ScienceDaily (2008-01-22) -- Biologists have made a startling discovery about the relationship between organisms that most people have never heard of. The Tree of Life must be re-drawn, textbooks need to be changed, and the discovery may also have significant impact on the development of medicines. The discovery has gained attention from biologists worldwide. The findings come from the largest ever genetic comparison of higher life forms on the planet. ... > read full article
ScienceDaily (2008-01-22) -- Biologists have made a startling discovery about the relationship between organisms that most people have never heard of. The Tree of Life must be re-drawn, textbooks need to be changed, and the discovery may also have significant impact on the development of medicines. The discovery has gained attention from biologists worldwide. The findings come from the largest ever genetic comparison of higher life forms on the planet. ... > read full article
http://www.sciencedaily.com
참고
3 Domains system 발표 이 후 새로운 새로운 트리가 그려짐.
4개의 super group으로 나눔.
Unikonts(Opisthokonts): 아메바, 곰팡이, 사람을 포함한 동물
Excavates: Protista의 일종으로 인식되어 왔다, free-living and symbiotic form(free living organism and
parasites)
Plantae: 식물(녹조, 홍조류, 식물)
SAR: S, Stramenopiles, 대부분의 조류, 대부분 플랑크톤의 구성원
A, Alvelates Protista의 일종으로 알려져왔고, 일반적인 protozoa, parasitic protozoa, 대부분의 marine flagellates를 포함.
R, Rhizaria Protista의 일종, 대부분의 아메바성 섬모류, 해양저서생물, 대부분의 해양플랑크톤
트리를 만든 재료는 전체 분류군의 5000여개의 유전자를 확인하여 공통적으로 가지고 있는 123개의 유전자를 이용해 tree를 만든 결과.