Re: Re: HYB: rebloom genetics
iris@hort.net
  • Subject: Re: Re: HYB: rebloom genetics
  • From: B* W* <a*@aol.com>
  • Date: Thu, 13 Jan 2011 22:34:21 -0500 (EST)
Ah, when I raised guppies, the half blacks and three quarter blacks never
seems quite as spirited or vigorous as the others.  Now I may know why.  Maybe
this would explain why I don't seem them any more.


<<though many seem to lack the vigor of their cousins of the same species to
one degree or another.>>

Betty W.





-----Original Message-----
From: Steve Szabo <steve@familyszabo.com>
To: iris <iris@hort.net>
Sent: Thu, Jan 13, 2011 7:46 pm
Subject: RE: [iris] Re: HYB: rebloom genetics


Black fish. I'd need to look at the betta blacks for more information, but
ther species who produce blacks tend to be shorter lived than their more
olorful siblings or cousins (black can and does breed true). Black fish
eed a diet that is higher in protein than their more colorful relatives of
he same species. Depending on their natural diet, this can be hard to
upply, if you even know the need for it.
Black fish also tend to get cancer at a much higher frequency than one would
xpect, based on knowledge of the species involved to produce the black;
ometimes one species sometimes two or more were originally used. For
xample, one variety of black molly had three species involved to develop
he rich black that it has.
Black fish also have a tendency to a higher rate of fish tuberculosis.
Black fish also tend to need higher temperatures than their relatives to do
ell, though many seem to lack the vigor of their cousins of the same
pecies to one degree or another.
So, there you have it, more than you wanted to know about black fish.
There is one important fact you need to keep in mind about genetics that I
earned from Neil Morgensen before he wandered off to tend that iris bed in
he sky. It is very difficult to take lessons learned in animal genetics and
pply them to iris genetics and it is the same going the other way. We did
ave some long discussions about this on and offlist.
\\Steve//
-----Original Message-----
rom: owner-iris@hort.net [o*@hort.net] On Behalf Of Linda
ann
ent: Thursday, January 13, 2011 10:05 AM
o: iris@hort.net
ubject: [iris] Re: HYB: rebloom genetics
Thanks Chuck.
Can you think of any instances where a dominant gene in multiple doses
as some kind of amplifying effect?  In other words where it has the
pposite effect of being lethal?  I guess it wouldn't be considered a
rue dominant in that case.
Any thoughts on the chemistry of what's going on when the cycle gene is
ff?  Is any of that chemistry reversible, or could it be speeded up by
n extra gene set?  Ok, this is getting way off the track - sorry.
It's just frustrating trying to interpret results since rebloom here is
o dependent on year to year seasonal weather variations as well as
eneral climate, so that even "dominant" genes can't be seen half the
ime (or more, or less).  Seems like a plant should have a hard time
iguring out how to grow at all with four sets of genes that don't agree
ith each other.  ;-)
Interesting example about the fish - does the color gene cause death or
s it another gene linked with it?
<I don't know of any situation of where a dominant gene is no longer
unctioning when it is in multiple dosages, unless it is a lethal gene in
ultiple dosages. Those exist, and the plant or animal just dies. One
xample
f this is black Siamese fighting fish. Males with two dosages of black gene
ie.

erhaps someone else knows of a situation where a dominant gene is
urned off
n multiple dosages, but I can't think of any off hand.>
Linda Mann east TN USA zone 7
etting a little cabin fever crazy!
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