• Biological characteristics of Katahdin sheep selected for footrot resistance 

    Azarpajouh, Samaneh, 1984- ([University of Missouri--Columbia], 2014)
    The objectives of this study were to select sheep divergent for a footrot resistant genotype by screening with the DQA2 gene marker and to investigate the host resistant immune response, neutrophil phagocytic efficiency, ...
  • Genotype by environment interaction estimated by using reaction norms in cattle 

    Maricle, Elizabeth Ann (University of Missouri--Columbia, 2008)
    The objective of this study was to evaluate GxE by comparing reaction norms among U.S. Angus bulls. Dependent variables were adjusted weights at birth, 205 d weaning, and 365 d yearling. Environments were defined as progeny ...
  • Genotype by environment interactions for growth and stayability in US red Angus 

    Fennewald, Dennis (University of Missouri--Columbia, 2012)
    Genotype by environment interactions (GxE) may reduce accuracy of sire selection. The objectives of this study were to evaluate the presence of GxE by comparing reaction norms of bulls for birth weight, weaning weight, ...
  • Mitigation of effects from heat stress by Artemisia species 

    Selby, Catherine Clare (University of Missouri--Columbia, 2012)
    Artemisia afra (AF) is a herb used by indigenous peoples of South Africa to alleviate heat stress during desert travel, and Artemisia absinthium (AB) is a related plant grown in the U. S. Two experiments were conducted to ...
  • Selection for placental efficiency in swine 

    Mesa Echeverri, Henry, 1972- (University of Missouri--Columbia, 2004)
    With the overall goal of increasing profitability by increasing litter size, two lines of pigs were divergently selected for four generations on an index of reproductive traits (n = 193 litters). The selection index (SI) ...