>Yes the first leaf of allium is a true leaf. the cotyledon is still
>attached to the seed.
Allium seeds may be attached to the cotyledon, but the seed coat is
above ground at the tip of the cotyledon, just as you would expect for
>I am not a fruit fly specialist actually worked only 1 year with
>them I have first a general degree in Biology ( takes here 6 years
>including 50 % botany . Then a PHD (another 4 years) in fungal
I greatly respect your intelligence, but I find that you make some
very broad assumptions in the articles you have in the Hosta Journal
that are not supported by any evidence. You now admit that mutations
are rare, but yet you still think that mutations can partly account
for the high rate of sporting in hostas and you seem to imply that
hostas have a high rate of mitotic crossing over but never present any
evidence of it.
Could you also explain to me how it is that a mutated gene can never
have more then 99% of its original activity as you implied in the
Journal and can you please site the references to support this.
>I forgot about the mitotic crossing over. It is the most likely
>explanation for a green edge appearing as a sport on a yellow plant,
>not very rare in hosta as can be seen in my book on sports.
As to high levels of mitotic crossing over, I would not rule it out as
something that may be unique to hostas, but if it did occure there
should be some other consequences that should show up. In your
Journal article you seem to imply that mitotic crossing over can be
the cause of quite a few sports. If mitotic crossing over did occure
it could occure in ANY cell undergoing mitosis. This should result in
some daughter cells that are now recessive for a trait that was
heterozygous, such as yellow leaves. If mitotic crossing over does
occure wouldn't we see patches of recessive traits showing up
scattered throughout the plant?
Also, I'm not going to believe that mitotic crossing over is common in
hostas just because you say so when you don't present any evidence for
it. If you want to convince me, show me the evidence! Your book of
sports is mostly unsupported assumptions, so I am not going to accept
that as an authority to explain sporting in hostas.
The point I've been trying to make is that your three rules of thumb
for figuring out sports in hosta is inadequate. I don't make any
claims to know the answer, but I am working on it. If you observe
hostas very carefully and how they sport you will come up with a few
bits and pieces of information that should give you an insight into
some possible explainations why hostas sport. If you can convince me
that you have figured out the clues, then maybe I'll discuss some of
my ideas with you.
I know you said you grow about 60 hostas. I would guess, however,
that you have never propagated hostas by the thousand as a commerical
venture as I have. I'll give you a hint to the answer to the offer in
the previous paragraph - if you learn to propagate hostas rather then
just grow hostas you may discover some very interesting things.
Now, would you please answer the questions you seem to keep averting.
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