「日本猫」ってやはり正しい血統があるのかな【再】
The question of whether "Japanese Cats" actually have a proper pedigree is resurfacing online.
Delving into how they differ from purebreds and what constitutes a native Japanese cat reveals surprisingly deep discussions.
These insights are sparking "I see!" reactions among cat enthusiasts.
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Nihon Neko (Native Japanese Cat)
The term "Nihon Neko" generally refers not just to any cat found in Japan, but specifically to a group of cats that have naturally established themselves in the Japanese archipelago since ancient times, adapting to local environments and developing unique characteristics. Academically, they are often called "native cats." Their origins are believed to date back to the Yayoi period, having arrived from the Chinese mainland along with rice cultivation, primarily for rodent control. They have not been managed as a specific pedigree breed; rather, they have maintained genetic diversity through repeated natural interbreeding. Typical features include short tails like bobtails or curled tails, a high prevalence of calico cats (especially among females), and a relatively sturdy build. However, there is a growing concern that the population of "pure" Nihon Neko, meaning individuals with distinct genetic traits of native cats, is decreasing due to interbreeding with purebred cats introduced from overseas. The question of a "proper pedigree" in this article highlights not artificial pedigree management like that of purebreds, but rather the historical, cultural, and genetic roots and uniqueness of Nihon Neko.
Purebred (Purebred Cat Breed)
A "purebred" refers to a cat breed that has been artificially managed through strict criteria (breed standards) for breeding, in order to maintain specific physical traits and genetic characteristics. Major international cat organizations such as CFA (Cat Fanciers' Association) and TICA (The International Cat Association) recognize many breeds, with famous examples including Persians, Siamese, Maine Coons, and Bengals. Purebred cats can be traced back several generations through pedigree certificates, and are systematically bred by breeders to manage the risk of specific hereditary diseases and maintain the health of the breed. Their conformity to breed standards and beauty are evaluated in events like cat shows. The question "proper pedigree" in the article's title raises the question of whether Nihon Neko fits this definition of a purebred, or if their "lineage" should be understood through a different concept. As Nihon Neko primarily engage in natural breeding and do not undergo strict pedigree management like purebreds, it is crucial not to confuse these two concepts to deepen the discussion.
Genetic Diversity
"Genetic diversity" refers to the richness of genetic variations present within a species or population of organisms. The greater the differences in genes among individuals, the higher the genetic diversity. This diversity serves as a crucial foundation for the entire species to adapt and survive against environmental changes and the emergence of new pathogens. For instance, even if individuals with a specific genetic sequence are susceptible to a particular disease, a population with diverse genes would have individuals resistant to that disease, reducing the risk of species extinction. In the case of purebreds, inbreeding is often repeated to fix specific appearances or traits, which can lead to a loss of genetic diversity and an increased risk of specific hereditary diseases (e.g., heart disease, kidney disease, bone and joint disorders). On the other hand, Nihon Neko (native cats), which have primarily engaged in natural breeding, are generally considered to have high genetic diversity because interbreeding has occurred freely among individuals with different genes. However, concerns are also being raised that the genetic diversity of native cats is diminishing due to habitat fragmentation caused by urbanization and interbreeding with non-native cats, drawing attention to the importance of their conservation. Considering the "pedigree of Nihon Neko" from the perspective of diversity encompasses a profound theme related to the healthy survival of the species, going beyond mere appearance or classification.