Lyre swordtail male is beautiful, but because I am inexperienced in artificial insemination, having a very high ratio of male lyretail made me feel the project giving too much waste. Fortunately, I read about Kings lyre swordtail from Mr. Rainer's website and was very fascinated with it. So, I spent a lot of time to hunted for a few species of kings lyre to restart my lyre swordtail project from a new direction. Having done many try-and-error with all kings lyre swordtail males I collected from many sellers, but it seemed hopeless until a couple months ago, I got my first batch. The fact that all females used in my experiment are virginly paired to the kings lyre male, plus those females are all albino Kohaku swordtail (a good test model because females are fully recessive to all traits). Below is the video showing the Kings lyre father in my experiment: .My very first batch of swordtail frys born to the kings lyre father has 50% black eyed, bricked red body and 50% red eyed, albino yellowish gold color. A couple month passed, I was frustrated to find out that more than 70% of the wild type juveniles in the batch developed high fin, when only about 20% of albino has the high trait. This much difference between the two numbers kept me confused until present without any reasonable explanation (the ratio of high fin trait in both wild type and albino should be roughly the same at about 50%). Some events had shadowed my project that the laboring mother jumped out of her tank during a night, and the father with some of the best high fin boys were killed in an accident (bleach leaked to the tank). When those juveniles started to sex out, I was pretty much disappointed to say there was not any little clue of lyretail sighted, especially when I lost the parents. F1 inbreeding is the only way to keep the project go on, I thought. Should kings lyre trait is recessive, I doubted. Within an action of culling process, I isolated 04 early mature low fin males, "exiled" them to the outdoor pond testing the strain's resistance to temperature. Beautiful sunshine and cool rain water does positively contribute to the outgrowth of those guys; and guess what? I visited the pond today and was delighted that they are not only survived the low 60F, but also bore double swords; which meant they are carried on kings lyre trait from the father. Another detail is I found 2 female siblings (or at least their conformation convinced me their sex) with a bottom sword, an interesting fact was shared in Mr. Rainer's webiste. I will see how those females develop and keep you all updated later. So, kings lyre is not recessive at all if it appeared in F1. The fact that only male showed up lyretail trait does confirmed my hypothesis that kings lyre indeed lyretail gene resides on or links to Y (male) chromosome. Would a female with sword mean any thing to this inheritance model? Maybe some point of time, swordtail crossing to platy creating hybrid form that, for example, the pair of sex chromosome [WY] sexed out a female, yet has ability to protrude a sword. Also read related post about kings lyre swordtail and sex determination in platy fish. The video below is F1 kings lyre born in my project:
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September 2019
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