The "Ask Anything" to Nicalandia Thread

[nicalandia]

I know the breeder said she was going to test him for the homozygous blue gene testing the featherIQ company now has

Being homozygous for the Blue egg shell Oocyan mutation will give him a pretty high probability of being also homozygous for the Pea Comb P/P, but not guarantee it.

 

[NatJ]

If it's less than 50 chicks then a single clutch can still produce all single combs..

I think your number is wrong.

If the rooster is P/p, and the hen is p/p, then we would expect half of chicks to show single combs, and half to show heterozygous pea combs.

If you hatch only 5 chicks (five), there is a 1 in 32 chance that they will all have single combs.

If you hatch 10 chicks (ten), the chance of having them all get single combs is about one in a thousand.

So I don't think you need anywhere close to 50 chicks to be pretty sure of seeing pea combs, if the rooster is P/p. (And since we've seen a photo of him, we know he is not p/p, the only case where 100% single comb offspring would be expected.)

 

[NatJ]

This goes the same for rose combs, right?

I'll be working with Australorp x Wyandotte for my Silver-Laced Australorp(ish) project. I've got one single-combed SLW to use, but the other SLW is rose-combed.

Um, sort of.

P/p often looks different than P/P or p/p.
Rose comb tends not to look different. So R/r looks the same as R/R.

But some of the other points work about the same:

Single comb to single comb breeds true. Single comb is r/r and p/p (not-rose and not-pea.)
It's also not-dupex.

If you breed R/R (pure for rose comb) to r/r (pure for not-rose), every chick will be R/r (split, showing rose and carrying not-rose.)

If you breed R/r (split) to r/r (single comb, pure for not-rose), half the chicks will be R/r (split for rose), and half will be r/r (pure for not-rose, so single comb.) If you keep the r/r chicks (single combs) for your breeding project, you will not see rose comb again, unless you breed to a rose comb bird again.

 

[JacinLarkwell]

He's an F2. His father was an F1

That male is clearly an F1 of sorts. The issue becomes more complicated when you take the F1 and keep breeding back to pure pea comb, in that case the P/p+ males(F1 back to Ameraucana) have smaller Combs than the F1s, but not as tight as the pure ones.

This is the rooster in question that confirms that P/p+ males that have been breed for generations can have small Combs.

View attachment 3212243


Before assuming anything, I would test breed him with a single comb hens. Let them be without a rooster for a few weeks, then put them with him and hatch at least a dozen eggs

 

[nicalandia]

I think your number is wrong.

With such small numbers you are actually falling for what is called "Gambler's Fallacy"

Law of small numbers may result in Gambler's Fallacy. For instance, when flipping a coin and get 6 heads in a row, individuals will start putting too much probability in the next flip being a tails. And this is a reasoning based on just small amount of data in the sample.

What I am trying to say is that "All Chicks Hatched with single comb" on a single clutch of eggs is still within probabilty(however small it is) In order to get 50% p+/p+ and 50% P/p+ we need larger number of hatches.

 

[nicalandia]

He's an F2. His father was an F1

F2 = F1 x F1

BC1 = F1 x Parent line(in this case Pea Comb Parent)

 

[JacinLarkwell]

F2 = F1 x F1

BC1 = F1 x Parent line(in this case Pea Comb Parent)

His father was pea x single. His mother was single

 

[nicalandia]

His father was pea x single. His mother was single

Yes, his large comb is a testament of that.

 

[3KillerBs]

P/p often looks different than P/P or p/p.
Rose comb tends not to look different. So R/r looks the same as R/R.

So scrupulous records will be required.

I'm tempted to ask Ideal if it's actually possible to have them select single-comb SLW hatchings for me in my next order. I suspect that it would not be, but I suppose that if I don't ask I'll never know if they might have.

 

[NanaK]

So scrupulous records will be required.

I'm tempted to ask Ideal if it's actually possible to have them select single-comb SLW hatchings for me in my next order. I suspect that it would not be, but I suppose that if I don't ask I'll never know if they might have.

You might have better luck looking for a breeder nearby and talk with them about that??