apple_20K_marker_position_data.txt

List of the 10295 SNP loci genotyped with the Illumina Infinium 20K array on the apple FBo-Hi Elite material. The column "Index_20K" indicates the SNP index number on the 20K array that is used as column name in the file apple_FBo-Hi_Elite_marker_data.txt. The column "Original_Locus_Name" indicates the full name of the SNP; the column "Affymetrix_id" indicates the name of the SNP on the Affymetrix Axiom 480K SNP array (Bianco et al 2016); the columns "chr" and "position" indicate the position of the SNP on GDDH13 v1.1 reference genome (Daccord et al 2017). A value of "0" in column "chr" means the SNP is located on an unmapped portion of GDDH13 v1.1 genome. A value of "19" in column "chr" means the position of the SNP could not be deduced from BLAST results. A value "not robust on 480K" in columns "chr" and "position" means the SNP was not considered robust when genotyped on the Affymetrix Axiom 480K SNP array and thus not used for imputation. The column "Used ot not" indicates if the SNP was used for imputation in the work of Cazenave et al (2021). The subset of 10295 robust SNPs was filtered from the 20K genotyping results as described in Howard et al (2021).本数据集收录了通过Illumina Infinium 20K芯片对苹果FBo-Hi Elite材料进行基因分型得到的10295个单核苷酸多态性（Single Nucleotide Polymorphism, SNP）位点信息。其中，"Index_20K"列代表该位点在20K芯片上的SNP索引编号，同时作为文件apple_FBo-Hi_Elite_marker_data.txt中的列名；"Original_Locus_Name"列标注该SNP的完整名称；"Affymetrix_id"列标注该位点在Affymetrix Axiom 480K SNP芯片上的编号（Bianco等，2016）；"chr"与"position"列分别标注该SNP在GDDH13 v1.1参考基因组上的染色体编号与物理位置（Daccord等，2017）。若"chr"列取值为"0"，则代表该SNP位于GDDH13 v1.1基因组的未定位区域；若"chr"列取值为"19"，则代表无法通过BLAST比对结果推断该SNP的染色体位置；若"chr"与"position"列取值为"not robust on 480K"，则代表该位点在Affymetrix Axiom 480K SNP芯片上的分型结果不稳健，因此未用于基因型填充。"Used or not"列标注该SNP是否在Cazenave等（2021）的研究中被用于基因型填充。本数据集中的10295个稳健SNP位点子集，是按照Howard等（2021）所述方法从20K芯片分型结果中筛选得到的。