7Raadsma H W. Fleece rot and body strike in Merino sheep Ⅴ heritability of liability to body strike in weaner sheep under flywave conditions. Australian Journal of Agricultural Research, 1991, 42: 279-293.
8Andersson L, Rask L. Characterization of the MHC class Ⅱ region in cattle. The number of DQ genes varies between haplotypes. Immunogenetics, 1988, 27:110-120.
9Scott P C, Choi H L, Brandon M R. Genetic organization of the ovine MHC class Ⅱ region. Immunogenetics, 1987, 25:116-122.
10Hickford J G, Zhou H, Fang Q. Haplotype analysis of the DQA genes in sheep: evidence supporting recombination between the loci. American Society of Animal Science, 2007, 85: 577-582.
