A question about platy hybrids

ducatigirl

ducatigirl

AC Members
Jan 2, 2010
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Bunbury, Western Australia
Back in january, my platy had 30+ fry.
Now half of them are gold, some are blue and some are orange.
Thing is, there are 3 or 4 which have a super long top fin, looks really out of proportion to rest of body, all the platys I have have a short top fin.
Except one, and I'm not sure if its a platy or a big guppy.

It's got me stumped!

Tried taking photos but they are just mental.lol
So this is the best I could get
The top photo is the long fin adult possibly not a parent but its the only long fin fish I have.
the second is the fry

DSC01913.JPG DSC01935.JPG
 
I wouldn't worry about it being a guppy because guppies and platies can't inter- breed together. Guppies and Mollies can and Platies and Swordtails can but to my understanding guppies and platies can't inter- breed.

There is a Hi-Fin variety of Platy which is probably what you have in your line somewhere even if the rest of the siblings are reg. finned. I think they look a bit out of whack too, LOL.

Oh very pretty platies by the way!!!
 
Hi
Have bred platies swords for many tears but the laws of genetics for them stiill elude me LOL. To my knowledge there are at least 200 named cultivars of platies /swords. Which means your odd of getting either a wild ofr line bred strain is almost zilch lol
The HI fin platy ,again to my knowledge was the first established . this was then crossed with a sword This results in what is known as A HI fin lyretail sword it is also possible to have a sword in both males and females as well as a sword on both sides of the caudal fin.
I would suggest that your HI fin probaly has at least 3 generations of the trait in it's lineage. Feek certain that it;s at least double recessive and can't be "Fixed " In other words all offpring having the trait.
Now if you were to mate that one with mother/ father would result in 75 percent shoing the trait.
The highest "line breeding" that I've heard of is this "Red eyed red hi fin lyretail with sex rirelevant double swordtail.l lol Every one of these traits is double to triple recessive as well as all offspring are sterile as well as bein incapable of breeding , Must be done with artificial insemination.
I line bred flor several years to produce what is known as a "Red Jet" half red and hal black unlike "WAG which displays solid colored body with black fins .
To my knowledge Platies and swords were first crossed in 1909 lol
If your interested in producing more showing the exagerated dorsal your already half way there by haveeing the trait spontaneously appear.
Okay there a thousand time more than you EVER wanted know I'm sure lol
Enjoy your fish lol gary
 
Hi
Because either the mother or father is carrying a double dose of the gene. I'm not familiar with the high fin or lyre tail trait but is recessive meaning that all offspring will never be 100 percent hi fin. If you want to increase the number showing the trait you will have to cross brother and sister in the next generation. Usually with most recessive traits a better result is had with a mosther son cross with both showing the hi fin..
Are the ones showing the trait male or female?? Some traits are sex linked meaning that the trait is only displayed by one sex.
A classic natural example is the "Sword" on a swordtail never displayed by females.
They appear to be of the Variatus strain?? I believe that is the origin of both hi fin and lyretail strrains.
The genetics of these fish become VERY complicated due to the fact that that all the wild species will cross and and result in fertile off spring. Therefore almost every trait can be moved to the next generation.
My guess would be that the parents of your fish both had the Hi fin trait ??
I'm not sure if the gene is single or double recessive.
If your interested in the genetics there are some books on the subject but WOW is it complicated lol. For example these fish have 58 pairs of chromosomes where mammals have only 48. gary
 
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