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Australia's kangaroos are genetically similar to humans and may have first evolved in China, Australian researchers said.

Scientists said they had for the first time mapped the genetic code of the Australian marsupials and found much of it was similar to the genome for humans, the government-backed Center of Excellence for Kangaroo Genomics said.

"There are a few differences, we have a few more of this, a few less of that, but they are the same genes and a lot of them are in the same order," center Director Jenny Graves told reporters in Melbourne.

Humans and kangaroos last shared an ancestor at least 150 million years ago, the researchers found, while mice and humans diverged from one another only 70 million years ago.

Kangaroos first evolved in China, but migrated across the Americas to Australia and Antarctica, they said.

"Kangaroos are hugely informative about what we were like 150 million years ago," Graves said.

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  • mmmm
    Lv 5
    1 decade ago
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    澳洲的研究人員表示:“澳洲的袋鼠從基因上來說與人類是相似的,且最初的演化可能是發生在中國大陸”。

    具政府機關背景的澳洲袋鼠基因組中心宣稱:“科學家說他們破天荒首次繪製出澳洲有袋動物的基因密碼,並且發現其中有許多都與人類的基因組相似。”

    中心的主任珍妮葛瑞夫對莫爾本的記者表示:”是有著一些差異性,我們這個多了一些,那個少了一些,但是他們是相同的基因,而且其中許多都有著相同的序列。”

    研究人員發現,人類和袋鼠至少在1.5億年以前還擁有著共同的祖先,而老鼠與人類演化分岐則只是在7千萬年前的事。(註:英文字面上來說,人類與袋鼠最後擁有共同的祖先至少是在1.5億年以前的事,而老鼠與人類開始發展成各自不相同的物種則只是7千萬年以前的事)

    他們說:”袋鼠最初的演化是在中國大陸,但是卻橫越美洲而遷移至澳洲及南極洲。”

    葛瑞夫說:”對於1.5億年以前的人類是什麼樣子,袋鼠可提供大量的有益資訊。”

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