Revisiting "Using Irises with SA/,,,,"
- To: "Space Age Robin" S*@yahoogroups.com
- Subject: [SpaceAgeRobin] Revisiting "Using Irises with SA/,,,,"
- From: "Neil A Mogensen" n*@charter.net
- Date: Thu, 22 Jan 2004 20:19:15 -0500
- Content-length: 8758
Kelly and others,
Let's try this again and get it right this
time. Pierre Rutten kindly and gently reminded me of the reduction
division to the haploid number before we get to Punnett Squares, etc. I
seem to be operating in a fog right now and slid right by that most basic bit of
genetic know-how--and there's a cause. I've been right on the edge between
a nasty bronchitis and crisis pneumonia for several days--as if I needed an
excuse. These things go with the turf over which I've traveled the past
couple of years...this makes the third time since June.
So....the possibilities with one factor in a
diploid are A, a. There are only four squares in a single factor array in
diploids. With two factors taken together one has on each side AB, Ab, aB,
ab, so the square has sixteen possible outcomes.
With tetraploids, the haploid number gives two of a
factor, so the one factor condition has AA, Aa, and aa--nine possible outcomes
for the single factor in the array. With two factors it gets a little
complicated--provided the factors are inherited independently. The
possible gametes are AABB, AABb, AaBB, AaBb, Aabb, aaBb and aabb, giving an
array of forty-nine outcomes--with only two factors.
The rest of what I said, I believe, stands as
stated. Only those assertions concerning the numbers involved were
grievously in error. When I'm wrong, I enjoy doing it up fine.
Better yet, read TWOI. It will give you a
headache, I guarantee.
On another track, I have transferred all our
messages to a set of Word files through post # 1017, and have begun editing
them, deleting extraneous advertising materials, and so on. Where messages
are copied in their entirety I am taking substantial liberties in removing the
duplication or selecting out the portion of the previous post being responded
to. If anyone objects to this approach, please let me know
offline.
I'm still here, still plodding along. Y'all
are doin' fine from what I can see...we're getting close to a workable consensus
on what SA's to use. We can then concentrate on what "ledge," non-ledge
and known breeders that have been reported to do this or that we may want to
use.
If anyone wants to see the extent of Sass ancestry
in pinks, look at the pedigree/family tree of CHERIE on the HIPS site.
FANTASY, mentioned by Sharon McAllister as one of the types having the ledge
under the beard, is one of the parents of Cherie, so the entire known ancestry
is right before our eyes.
That (Golden Eagle x 39-62) cross behind Hall
42-07 yielded several other seedlings than the one showing in the tree
behind Cherie. The earliest Hall seedlings used in Utah were mostly
or entirely sibs to that seedling if I remember correctly.
Neil Mogensen z 7 western
NC
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