Rose Comb Rhode Island Whites

[Sneebsey]

Test mating is not easy because there are four comb genes. Rr rr,rR rr,rr Rr or rr rR will still give you a rose comb. A single comb is rr rr.

A bird only has two loci, therefore a bird may be RR, rr, or Rr. The offspring get one gene from each parent, who got one gene from each of their parents and so on.

As @nicalandia posted above, R/R x r/r will produce all R/r. A gene from each parent.

Test breeding would be done by taking the bird that is in question (R/r or R/R, but we don't know which as they both appear the same) and breeding to a single combed bird (r/r). If any single combed offspring hatch, then the tested bird is impure for rose-comb, so is R/r.

 

[The Moonshiner]

Test breeding rose comb to see if they carry single is easy.
Breed the rose comb to a single comb bird (any breed as long as its single comb)
You'll have to produce more then a couple chicks but if produces all rose comb offspring then it is pure for single comb. If it produces any single comb birds then it carries the single comb gene.

 

[The Moonshiner]

A bird only has two loci, therefore a bird may be RR, rr, or Rr. The offspring get one gene from each parent, who got one gene from each of their parents and so on.

As @nicalandia posted above, R/R x r/r will produce all R/r. A gene from each parent.

Test breeding would be done by taking the bird that is in question (R/r or R/R, but we don't know which as they both appear the same) and breeding to a single combed bird (r/r). If any single combed offspring hatch, then the tested bird is impure for rose-comb, so is R/r.

D@mn you beat me.
But great minds think alike.

 

[Rancher3535]

Got a dumb question for you genetics experts... One of my Rhode Island Whites turned out to be a single comb bird. The rest are all rose comb. Is the single comb a recessive gene? My selected birds for breeding are all rose comb and are the best of my flock, do I need to watch for more single combs?

Just curious as to who you got your Rose Comb Rhode Island Whites from? I have a pretty large flock of them and there are not that many breeders out there in the breed.

 

[rjohns39]

Mine came from two different sources. A guy in FL and the other was up north.