R-locus for roaned coat is associated with a tandem duplication in an intronic region of USH2A in dogs and also contributes to Dalmatian spotting

DNA was extracted from buccal swab samples collected by dog owners and extracted by Illumina, Inc. Genotypes of the dogs were collected by using custom Illumina Canine high-density SNP arrays (a total of 220,484 markers).DNA提取自犬主采集的口腔拭子样本，该提取流程由Illumina公司完成。研究采用定制化Illumina犬高密度单核苷酸多态性（Single Nucleotide Polymorphism, SNP）芯片（共计220,484个标记位点）收集犬只的基因型数据。