Endlers

Wow, as hein24 mentioned, breath taking is a understatement!!!!

Thanks Prof, I real asset to TASA, bow down to the great PROF!!!hehe

But all jokes aside, really interesting facts, will try and google the topic,just as a read. I might be prolonging this, but when a gene becomes dominant, will all the fry be as well? Or not? My feeling is no?

And have you seen any type of defect? , as in humans, when the 21st or 22nd chromosome is missing? (can’t remember, as per the girls in the class…) and one sits with a “special” fish? Or am I asking a dumb question? I can remember a few things, but as hein24 will know, my memory, she is very bad. But I was fascinated with DNA and RNA, and testing to see the differences between dominant genes.

Vez

 

or is it when another chromosome is added???????

 

I think they should change it to getting guppies to mate is easy, breeding what you want is a different ballgame.

 

Lol my bad, jis but generics is amazing hay....

 

Yes Vis, you are quite correct breeding them into something that does not look like another LFS guppy is not so easy.

Hein boet, we call medicines that have the same contents but are made by someone without the expensive licence as "generics", but what we are talking about here is "genetics" with a "t"!

Oh, and Vez and Hein, in my days if a girl looked attractive we called her "hot" now you say she is "cool", where are we going with all this man? I suppose guppies must be cool right?

Groete,

Dirk

 

Jip, i think, we can call it a day?

thanks for the info, from a Prof's side!! and yip, guppies are cool little fish, and thanks to ppl like you, they will stay cool.

if no1 has anything more to say, may i close this thread?

Vez

 

No, I think you should leave the thread open if anyone else wishes to comment, there is no reason to close it really.

Perhaps I should start on a genetics for yuppies, I mean guppies, sometime. I just start with a very heavy lecture schedule next week and do not have the time now.

Kind regards,

Dirk

 

okey, dis shap met my.

sound interesting, looking forward to the read,!

 

Hi Guys,


I have written before that I would describe some of my recent Endler guppy crossing experiments so I have put together a few pics and a story.


When one wishes to perform a cross one should set oneself objectives with regard to what you would like to achieve before the time and so this is how I argued:


Endler guppies have very intensive flourescent green colouration on their bodies, much more than normal guppies, they also have very nice tail fine edge colouration, but they do not have double swords or lyretails.



There are very nice normal guppy strains which do have lyretails or double swords.


As a result of these observations I said to myself that if I crossed an Endler guppy with a double sword, I may be able to breed a double sword guppy which would have the fin edge colouration of the Endler as well as the flourescent green body colouration.


So I bought a male guppy with a double sword which looked pretty wild type for the rest of his colouration, and his double swords were about one cm long. I then used this male to cross to an Endler female. In the pic below you can see the Endler guppies that I have showing a variety of colours in the males, and mostly showing variation in the amount of black coloration on the body. Note the fin edge colour of the males, all of them have it.





The F1 generation (the babies of this cross) all grew out well and were all very similar in coloration. None of the males showed any tail edge markings, so I deduce from this that these characters are dominated by the normal guppy genes. See the pic below:





None of them had double swords, so I deduce from this that the Endler genes dominated this.


Some of the females, about 50%, had the yellow fin edges that this female shows, so maybe this is the fin edge colouration of the Endlers showing in the female?


Well I then crossed the F1 generation amongst themselves (I only used females showing the yellow fin markings) which is what you do if you want to generate new combinations of the original parent genes and some of the males had double swords, others had single swords. I only kept double swords which is what the following pics show:










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So what do we note from these F2s:


The color of the tail edge from the Endlers has reappeared but not so much of the orange but rather just yellow. So we can deduce that edge colouration of Endlers must be a recessive gene.


The double sword reappeared in the F2 generation, but the length of the extensions of the double swords was far less than the original male normal guppy. So we can deduce that the double sword character of normal guppies must be a recessive gene.


The flourescent coloration of the Endlers is far less and must be recessive to the normal guppy grey body colouration.


The orange and the black body coloration of the original normal guppies is maintained in the F1 and F2 generation.


What to do next? Should I start again or continue?


Well if I would continue I would have to select youngsters with the original objective: double swords with color and more body coloration. Is this going to happen? Maybe after a few generations of selection?


Should I start again? Yes maybe, but then I would start with a male sword tail guppy with a much bigger swordtail and much longer fin extensions. This would be beneficial because the F2 would most probably have longer fin extensions and therefore I would have less selective breeding to do to get to the original objective. Also if the normal guppy might have more body coloration the F2 generation would also have more body coloration. Well, I already have some special long double sword guppies with red body coloration lined up for the next experiment.


Watch this space…..


Kind regards,


Dirk

 

Whoah prof baie cool geniet die thread baie baie cool.
Excellent read.