Re: HYB: punnett squares for TBs (Facebook discussion)
iris@hort.net
  • Subject: Re: HYB: punnett squares for TBs (Facebook discussion)
  • From: L* M* <l*@lock-net.com>
  • Date: Sat, 08 Feb 2014 12:37:47 -0500
So Keith had at least 567 seedlings from one type of cross in order to get those data? 

Half a lifetime of careful work and record keeping.

On 2/8/2014 11:55 AM, Chuck Chapman wrote:

Kidd's analysis of Keith's data showed plicata is far enough away from
kinetechore  to be independent. Thus  tetraploid genetics operate on
random sorting, rather then  strictly  a  Punnett square assortment.
But  Punnett square still gives best predictions. The plants  don't care
what the genes are, they will all still sort out  via tetraploid
genetics. It would take specific data to assess what distance genes are
  from kinetechore and thus how much independence. That is if you can
identify a single gene affecting  phenotype.  As far as I know, Kidd
only looked at plicata  genes. Mostly as Keith was keeping good records
that Kidd could use. Geneticists need lots of good data  to work with.
Without it  you are just working at theories. That is why I'm always
asking people for data, particularly on long crosses.  I don't get good
  success rates on a lot of crosses in my problematic climate so  have
less data  then I would like to  work  out gene effects.

Chuck Chapman


Linda Mann

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