Hello there and welcome to BYC! I am sorry, but I have no idea! But you might ask this question in this section of our forums....https://www.backyardchickens.com/f/16188/exhibition-genetics-breeding-to-the-standard-of-perfection I hope someone can help you there. Welcome to our flock!
Hello and Welcome To BYC! You might also want to ask on the Rosecomb breed thread https://www.backyardchickens.com/t/372105/rosecomb-thread
Welcome to BYC. Glad you decided to join our flock. I don't think you will be able to get Rosecombs with carnation combs. As far as I know the only two breeds that ever have carnation combs are Empordanesas and Penedesencas. Please feel free to ask any other questions you may have. We are here to help in any way we can. Cheers.
Welcome to BYC! You will find a lot of good information here. Keep on asking questions and you will get many good answers. You may also want to read the FAQ below.