Table 1.

Expected genotypic ratios for SDA-DDA linkages assuming tetrasomic or hexasomic inheritance^a

	Tetrasomic	Hexasomic
ABb	1/2–1/6r	1/2–1/5r
A	1/6r	1/5r
B	1/3 + 1/6r	3/10 + 1/5r
0	1/6–1/6r	1/5–1/5r

^aExpected genotypic ratio of progeny for single dose allele (SDA; A000 × 0000) and double dose allele (DDA; BB00 × 0000) markers linked in coupling

^b‘AB’ indicates presence of segregating alleles in both SDA and DDA markers, ‘A’ indicates presence of the segregating allele for only the SDA marker, ‘B’ indicates presence of the segregating allele for only the DDA marker, ‘0’ indicates that neither segregating allele is present