Paige Rockett's MSc Defence
Heat stress can negatively impact the sustainability and productivity of a dairy production system even in temperate regions such as Canada. A possible mitigation strategy is to use genetic selection to improve heat tolerance. However, it is difficult to study heat stress using weather station data due to the sparsity of stations and inconsistencies within datasets. Therefore, the aim of this study was to assess the impact of heat stress and to estimate genetic parameters for heat tolerance in Canadian Holsteins using an alternative meteorological data resource known as NASA POWER.