North American Fruit Explorers mailing list at ibiblio

[mIEKAL aND <qazingulaza@gmail.com>]

Thanks for that Lucky.

For us northern growers the real issue beyond resistance is hardiness.
 I'm pretty sure both Japanese Walnut & Heartnut are not hardy here
tho I am planting several varieties of Heartnut to see if that is the
case.  Anything with a bit of butternut in the genes seems to have a
much better chance in Z4.

The one observation I've made in my planting is that the trees which
produce nuts that look more like butternuts tend to be less resistant.
 The trees that produce nuts with the traditional heart shape coming
to a point, look to be healthier & in better shape.

My trees, which are from Bear Creek, were obviously in a very early
generation of breedings.  Each tree produces nuts that are different
enough that I can tell from the look of the nuts which exact tree they
came from.

~mIEKAL



On Tue, Jan 25, 2011 at 9:30 AM, Dr. Lucky Pittman
<lucky.pittman@murraystate.edu> wrote:
> I dug back through my files and found Dr. Spurgeon's article in the Sept
> 2004 issue of the NNGA Nutshell - "Butternuts - the Bad and the Good News",
> observations from his 25+ years of experience with
> butternut/buartnut/heartnut clones on black walnut rootstock.
>
> Dr. Spurgeon's observations:
> "1. All true butternuts are at risk from the Sirococcus fungus and those
> that appear healthy are either hybrids with Japanese walnut(or the heartnut
> bud sport), or are in isolated stands that have not been exposed to the
> fungus.
> 2. Butterjap and buarts are variably tolerant of the Sirococcus fungus;
> resistance ranges from partial to complete.
> 3. Pure Japanese walnut and the bud sport heartnut are completely tolerant
> of the Siroccoccus fungus, presumably because both have evolved together."
>
> The 'butternut' clones 'Ayres', 'Bountiful', 'Cobles #1', 'Kenworthy' have
> been shown by genetic testing to be buartnuts, and have exhibited complete
> resistance/tolerance in Dr. Spurgeon's orchard.
> 'Pierce' and 'Wallick' buartnuts were unaffected, healthy, and productive
> 'Mitchell' and 'Hancock' butternut hybrids appear to be mildly affected, as
> was 'Kinneyglen'.
> All heartnut clones appear to be fully resistant.
> Presumed pure butternut clones - Bear Creek, Beckwith, Booth, Buckley,
> Chamberlin, Creighton, My Joy, Van Syckle - were all severely affected, and
> are probably no longer in existence in his orchard, as in 2004 Dr. Spurgeon
> opined that they probably would all be dead within a few years.
>
> So... Dr. Spurgeon's message was that the Bad News is that pure butternut is
> probably a dying species that will be extinct in the near future, but the
> Good News is that canker-resistant hybrids of butternut with Japanese walnut
> and heartnut are already here - and some have been propagated for 75 years
> or more as 'butternuts', with no one knowing that they were actually hybrids
> until the advent of genetic testing through DNA analysis.
>
> LLP
>
>
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