The backcross of F1s is not carrying out after for Mb and Mc are I can regard those optimum temperature ranges as narrow as compared with other asterias. It is observed the seeds slowly against other asterias budding all at once. It is generally said that the asterias seedling inherits a father's charactor, this is not usually applied for the seedlings of miracle family. I consider the following. The miracle seedlings are equipped with the character which pulls out intensely the character which inherited from the ancestor and hidden. Is this the "recessive inheritance" said well?In the backcross of miracle helmet F1s (Mb, Mc), this character appeared and became very slow-growing seedlings. Therefore, the culture of F1s was difficult. Probably, this is the result of pulling out intensely the slow-growing character which the original miracle asterias imagined from the figure has. The backcross of F1s is not carrying out in first year. Since both Mb and Mc rotted, I am making me avoid the pollination to F1.