Re: yellow leaf = nuclear encoded
RE:>>3. One of my first controlled crosses was to bring pollen of a
fully yellow-leaved hosta onto a green mother plant. 50 % of the ofspring
was yellow This clearly proofs that yellow in hosta is a dominant nuclear
character. If we cannot agree on this it is pointless to continue.
Good afternoon, Ben,
Let me see if I can understand your basic assumptions, deduce
your hypothesis and than later I will try to understand the conclusions
1) Any ALL green pod parent is either homozygous GG, OR heterozygous
Gy, Gb, Gw, or Gr AND
2) Any ALL yellow pollen parent is either homozygous YY, OR heterozygous
Yg, Yb, Yw, or Yr.
How am I doing so far? Are these two assumptions correct?
Are there better symbols for this statement that I should be using?
3) The coloration in this pod parent (and extrapolated, possibly all
Hostas) is controlled by one set of genes at one specific locus, not multiple
genes at multiple loci.
While I don't know that this is true, have I correctly stated this
4) The pollen parent does not bring any chloroplast DNA to the party,
so if there are any changes in the color of the leaf of the resultant F1
progeny, then any changes to chloroplast makeup (DNA) in the prodgeny are
forced because of DNA changes in the nucleus as a result of the cross.
1) If you cross a yellow (in appearance) pollen parent with a green
(in appearance) pod parent, and you get 50% of the prodgeny to exhibit
the color of the pollen parent, then ANY and ALL yellow prodgeny are due
to a dominant nuclear DNA trait in the pollen parent.
I want to make sure I understand the assumptions and your hypothesis
BEFORE we move on to examining the results and any conclusions drawn.
Please comment, if you will as to the accuracy of my assessment.
This is my FIRST attempt to understand your LAST attempt to make sense
out of this mess. :-)
#1 Plantsman at http://hostahaven.com
1250 41st St
Des Moines, IA 50311-2516