The properties of artificially produced pearls are determined by the nacre and the mantle inserted. In the prior art, the pearl mother shell and the shell from which the mantle is derived were of the same type, so the types of pearls that could be produced artificially were limited. The present invention relates to a pearl mother shell, in which cells derived from different types of shells are held in the body, a method for producing the pearl mother shell, and the pearl mother shell. A method for producing pearls using The pearl oyster shell of the present invention can suppress the enucleation rate and the mortality rate even if a mantle slice of a different kind of shell is inserted into the pearl oyster shell. Further, since the pearl is formed from the inserted mantle slice, a pearl having the properties of a shell from which the mantle slice is derived can be produced. [Selection] Figure 4【課題】人工的に生産される真珠の性質は、真珠母貝及び挿入される外套膜によって決定される。従来技術では真珠母貝と外套膜の由来となる貝とは同種であったため、人工的に生産が可能な真珠の種類が限定されていた。【解決手段】本発明は、真珠母貝であって、真珠母貝に対して異種の貝に由来する細胞を体内に保持した真珠母貝、該真珠母貝の生産方法、及び該真珠母貝を用いた真珠の生産方法を提供する。本発明の真珠母貝は、真珠母貝に対して異種の貝の外套膜切片を挿入しても、脱核率や死亡率が低く抑えられる。また、挿入された外套膜切片から真珠が形成されるため、外套膜切片の由来となる貝の性質を有する真珠を生産することができる。【選択図】図４
