Table 2. Number of SNP loci genotyped in both parents and used for linkage mapping.

Female genotypea	Male genotype	SNPs in parents	SNPs used for mapping
ab	aa	51,817	1,603
aa	ab	32,654	942
ab	ab	793	0
ab	ac	99	0
aa	bb	300,107	0
Total		385,470	2,545

^aThe notations of a, b, c and d denote up to four possible alleles from two parents at an SNP site.