Genetic Parameters and Genome-Wide Association Studies for Fertility and Reproduction Traits in U.S. Katahdin Sheep Based on the Single-Step GBLUP Methodology. - Ospina AT; Lewis RM; Freking BA; Burke JM; Murphy TW; Wilson CS; Brito LF (Journal of animal breeding and genetics = Zeitschrift fur Tierzuchtung und Zuchtungsbiologie, 2026)