dog_glenn123 wrote:Hi all i have been breeding IRN's for 12 years and was basicly just breeding standard calours.
I had a pair of Lutino,s that always had 2 offspring and where always hens (4 yrs in arrow)
In birds, unlike in mammals, the offspring sex depends on the mother. If you only got females from your pair of lutinos there are at least 3 possibilities:
1. A statistic fact: 4 hens/clutch X 2 clutch/year X 4 years = 32 hens. You can have a (1/2)
32 (that is 1/2 x 1/2 x 1/2 ... 32 times) of getting all those hens from a "normal" lutino pair. This is a very, very low probability.
2. Ovocytes carrying the X gene from the female did not develop, and she only had Y ovocytes.... she only produces female offspring.
3. Male embryo would be homozygous for a sex-linked letal mutation and, thus, they do not develop, while female embryos would be heterozygous (just one X cromosome) and this mutation would not be letal for the female embryos (something similar to hemophilic disease in humans).
After the hen died i paired the cock bird with one of his daughters and in the 1st go i got the usual 2 lutino hens but also had 1 turquoise cock bird which is mainly green except for some tail feathers which are turquoise and the feathers next to the flight faethers on the wing.
Any ideas on how this happened?
I can not find any rational explanation with the present knowledge about IRN genetics. Let's analyse:
1. Let's imagine that the lutino cock is a SL-ino type .... thus his daughter is necessarily a lutino hen of the same type (SL-ino). If you pair him to his daughter all the offspring would be yellow (or white if the father and the daughter were split blue, or DF creamino if they were split turquoise, but never turquoise). In this case it does not matter if the lutino hen was SL-ino or NSL-ino since the daughter inherits the SL-ino gene from the father.
2. Let's imagine that the father was a NSL-ino type ... thus the mother must also have been NSL-ino in order to get all the offspring (32 hens) lutino. If she had been SL-ino the expected offspring would have been green split NSL-ino and also split SL-ino. Again pairing the father with the daugther will produce all lutino offspring (or white if the father and the daughter were split blue, or DF creamino if they were split turquoise, but never turquoise).
3. You can try any other combination with both types of lutino and splits ... you can never get a turquoise male from any genetics for lutino father and lutino daugther.
The only possibility is that the lutino cock is not the father of the hen: he is SL-ino and she is NSL-ino ... all the females from them will be lutino and if both birds are splits (blue or turquoise) and (blue or turquoise) you could get a turquoise male. Are you sure that the lutino hen is a daughter of the lutino cock?
To me this question seems similar to the one about the male cinnamon with a violet mother:
IT IS NOT TRUE/POSSIBLE ... but it was a great time thinking about it
Also i was thinking of pairing it to a blue lacewing cleartail any other ideas on what to pair it with?
A blue lacewing cleartail is in fact a blue pallid cleartail. How can you make the difference with a blue clairtail?
Regards
Recio
