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Re: Aphysemion australe gold
- To: KillieTalk at aka_org
- Subject: Re: Aphysemion australe gold
- From: "Prof D U Bellstedt, Biochemie" <Dub at land_sun.ac.za>
- Date: Fri, 30 Jan 1998 13:32:35 +0200
- In-reply-to: <199801301028.FAA27635 at acme_actwin.com>
About a year ago, a friend of mine from Berlin, Germany,
brought me some specimens of Aphysemion australe gold. Although
common in the rest of the world, they are hard to come by here in
South Africa. The one strain that was in the country was severely
inbred and I felt that some 'new blood' would do wonders. These
fishes were carefully chosen from two different dealers so that the
material brought in furthermore had greater genetic diversity. The
original fish have produced quite a few offspring (F1) and these
have been bred into the local strain with the result that the strain
is far better established here now. Some of the F1 offspring could be
called 'standard' male and female A australe gold i.e. the males as
shown in the AKA gallery and the females with the pale yellow
colouration. However, some of the F1 females are bright canary yellow
and some of the F1 males look like 'normal' A australe gold but they
do not have the brown markings in the tail. These females are quite
striking, the males on the other hand do not look so attractive as
the contrasting colours in the tail are absent. My assumption is that
this coloration is the result of the combination of the two different
strains that were originally obtained.
My questions are:
1) Is this a common form of A australe gold?
2) Do the golden yellow females have the same genetic makeup as the
males described above.
3) If the males and females are of the same genetic makeup how does
this fit in with the recently described inheritance patterns of A
australe gold. Are these perhaps the fish with the genotype aabb, and
are the other golden types aaB_ or A_bb?
The publication that I am referring to is that of Frankel, J.S. 1997,
"Inheritance of body coloration in the lyretail toothcarp (Aphysemion
australe Cypriodontidae), J. Hered. 88(5): 445 - 446.
This publication was discussed by Bruce J Turner, Dept Biology, VPISU
Blacksburg, VA on some mailing lists. He indicated that coloration
was controlled by two recessive autosomal recessive genes. All fish
with A_B_ are brown or 'wildtype' and with aaB_, A_bb or aabb are
Any comments would be appreciated.
Professor Dirk U. Bellstedt
Department of Biochemistry,
University of Stellenbosch,