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Tulip tree's genome is 'molecular fossil'

The "extraordinary level of conservation" of genetic data in the tulip tree remains largely unchanged since the dinosaurs, a study suggests.

The species' genomic change is about 2,000 times slower than in humans, making it a "molecular fossil", a team of US researchers said.

The new information has affected our understanding of flowering plants' evolution, they added.

The findings have been published in the open access journal BMC Biology.

The team from the universities of Indiana and Arkansas sequenced the mitochondrial genome of the species (Liriodendron tulipifera), only to discover it had one of the slowest silent mutation rates (a process that does not affect gene function).

They added that the sequencing showed that many of the genes that had been lost during 200 million years of flowering plants' (angiosperms) evolution had been preserved.

"Based on this, it appears that the genome has been more-or-less frozen in time for millions and millions of years," explained co-author Prof Jeffrey Palmer.

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It is always a shame when a nursery is prepared to let someone buy a poor specimin like this in the first place - at least if you go and choose one, you will make sure it does not have co-dominent leaders!"
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Mike Lish left a comment for Mike Lish
"Thanks for that Phil. It gave me the opportunity to revise.  Sorry to learn of your condition. Hope you are on the mend."
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Mike Lish replied to Mike Lish's discussion Tethering A Runaway
"Thanks for that Gary, what a good idea.  I have looked at some draw bar springs but they are the wrong configuration. Perhaps as you suggest trailer manufactrurers may be able to point me in the right direction."
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Gary RK replied to Mike Lish's discussion Tethering A Runaway
"I'd talk to one of the UK trailer manufactures - IforW or Wessex Trailers.
They build to spec and/or customise trailers and will probably have come across a similar requirement, so may be able to size/supply ?
 "
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Tethering A Runaway

I have been specialising in stump grinding for the past 18 years throughout Anglia.  Over that time period I have experienced  loss of drive to the wheels on a number of occassions while on site (a real bummer) and twice while up/down loading from…

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5 Replies · Reply by Mike Lish yesterday