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DC85
Member (Idle past 415 days)
Posts: 876
From: Richmond, Virginia USA
Joined: 05-06-2003


Message 1 of 8 (158521)
11-11-2004 8:31 PM


I am sorry this is a short topic.

I seem to remember a topic on a new species of rat.... Can someone please direct me to that topic?


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AdminAsgara
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Message 2 of 8 (158522)
11-11-2004 8:37 PM
Reply to: Message 1 by DC85
11-11-2004 8:31 PM


If you're talking about the tetraploidy rat, there has been some discussion here

This message has been edited by AdminAsgara, 11-11-2004 08:38 PM


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DC85
Member (Idle past 415 days)
Posts: 876
From: Richmond, Virginia USA
Joined: 05-06-2003


Message 3 of 8 (158550)
11-11-2004 9:28 PM


That is it... thank you... but I thought there was a source in that topic... Anyone have one?


My site The Atheist Bible

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Replies to this message:
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AdminAsgara
Administrator (Idle past 1536 days)
Posts: 2073
From: The Universe
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Message 4 of 8 (158551)
11-11-2004 9:32 PM


Thread moved here from the Proposed New Topics forum.

  
Morte
Member (Idle past 5336 days)
Posts: 140
From: Texas
Joined: 05-03-2004


Message 5 of 8 (158601)
11-12-2004 12:26 AM
Reply to: Message 1 by DC85
11-11-2004 8:31 PM


Message 3

Not sure if this will help now, but here's another post by Lam about it - it doesn't have a link to any info about the rats, but it does say that the species was only recently discovered and there isn't much information on it.


This message is a reply to:
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Asgara
Member (Idle past 1536 days)
Posts: 1783
From: Wisconsin, USA
Joined: 05-10-2003


Message 6 of 8 (158602)
11-12-2004 12:34 AM
Reply to: Message 3 by DC85
11-11-2004 9:28 PM


Just a quick google search brought up 750 hits. I don't know the quality of any of them....

Tetraploidy Rat


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pink sasquatch
Member (Idle past 5256 days)
Posts: 1567
Joined: 06-10-2004


Message 7 of 8 (158846)
11-12-2004 4:25 PM
Reply to: Message 3 by DC85
11-11-2004 9:28 PM


here's the original article
Access via pubmed here, you need journal access for full text.

Nature. 1999 Sep 23;401(6751):341.

Discovery of tetraploidy in a mammal.

Gallardo MH, Bickham JW, Honeycutt RL, Ojeda RA, Kohler N.

Instituto de Ecologia y Evolucion, Universidad Austral de Chile, Valdivia. mgallard@uach.cl

"Nevertheless, genetic evidence indicates that the red viscacha rat, Tympanoctomys barrerae (Octodontidae), is tetraploid. T. barrerae, which is a highly specialized desert rodent, has the largest chromosome complement in mammals with a single XY sex-chromosome system (Fig. 1). Although little is known about meiotic chromosome pairing in T. barrerae, the constant diploid number found in 13 specimens examined at three localities in Argentina indicates that segregation occurs normally."

PMID: 10517628

If you can access the article they have a great comparative figure showing that the tetraploid rat has enormous sperm to accommodate the extra DNA.


This message is a reply to:
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DC85
Member (Idle past 415 days)
Posts: 876
From: Richmond, Virginia USA
Joined: 05-06-2003


Message 8 of 8 (158971)
11-12-2004 11:40 PM



  
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