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nafex - [NAFEX] 60 vs 90 chromosomes?

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  • From: Lucky Pittman <lucky.pittman@murraystate.edu>
  • To: North American Fruit Explorers <nafex@lists.ibiblio.org>
  • Subject: [NAFEX] 60 vs 90 chromosomes?
  • Date: Thu, 02 Dec 2004 14:20:37 -0600

At 01:53 PM 12/2/2004 -0500, Jerry wrote:
 Be sure the understock is 90 C virginiana as 60 C virginiana keep their leaves well after the 90 chromosome. I can supply seed. These trees should harden off early.

Jerry, Lon, or anyone else,
Is there a simple way to determine if you have 60 or 90 chromosome races?
Seems like Don Compton intimated that the Ohio River was a 'dividing line', of sorts, between the 60s & 90s, but I may have misunderstood.
I usually grow my own seedlings from seed collected from a tree just up the street from my office, which I've designated '816' (the street no.); I suspect that it's probably Early Golden or Meader, but until my own graft of it and EG & M fruit out in my orchard so that I can compare them in close proximity, I can't be sure that that is the case. 
I presume that if it is Early Golden or Meader, it's a 90?

Lucky


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