Nathan and Jeanine Corley

What is the actual, genetic difference between linebreeding and inbreeding? For ethical breeders, preserving breed type without compromising immunological health is a constant balancing act. Dive into the mathematics of the Coefficient of Inbreeding (COI), the historical impact of the Maine Coon "Clones," and how to use genomic data to protect your cattery's legacy.

To provide the best for the breed, you must master the Genetic Staircase: the sophisticated balance between linebreeding to fix the look, and strategic outcrossing to preserve the life. Explore the history of the Maine Coon foundation cats and learn how to audit your pedigrees for hybrid vigor.

For the preservation breeder, a pedigree is not a family tree—it is a forensic map of biological debt and assets. Learn how to decode the genetic grid, identify historical leakage, and audit the clinical data to build a structurally and immunologically sound cattery.