Assignment of Atlantic salmon (Salmo salar) linkage groups to specific chromosomes: Conservation of large syntenic blocks corresponding to whole chromosome arms in rainbow trout (Oncorhynchus mykiss)

Table 2 Homologous chromosome arms of Atlantic salmon and rainbow trout**.

Atlantic Salmon		Rainbow Trout		Atlantic Salmon		Rainbow Trout
Chr.	LG	Chr.	LG	Chr.	LG	Chr.	LG
1p	17	19q	14q	13qa	5	16q	22q
1qa	"	23	30	13qb	"	12p	9p
1qb	"	5p	8p	14qa	3	8q	23q
2p	1 (sex)	3p	31p	14qb	"	14p	3p
2q	"	17p	29p	15qa	8	8p	23p
3p	11	28	13	15qb	"	9q	21q
3q	"	12q	9q	16qa	23	1p	6p
4p	28	19p	14p	16qb	"	18p	16p
4q	"	10p	20p	17qa	22	15q	7q
5p	12	14q	3q	17qb	"	7p	12p
5q	"	2p	27p	18qa	16	1q	6q
6p	4	4q	24q	18qb	"	9p	21p
6q	"	13q	2q	19qa	13	11p	19p
7p	24	21p	15p	19qb	"	16p	22p
7q	"	21q	15q	20qa	25	11q	19q
8p*	rDNA	20p*	rDNA	20qb	"	27	11
8q	19	10q	20q	21	14	22p, q	5
9qa	10	25	4	22	32	7q	12q
9qb	"	29	25	23	18	4p	24p
9qc	"	24	26	24	7	6p	10p
10qa	2	5q	8q	25	20	3q	31q
10qb	"	2q	27q	26	21	6q	10q
11qa	9	sex	1	27	15	18q	16q
11qb	"	26	18	28	33	20q	17q
12qa	6	13p/17p	2p/29p	29	31	15p	7p
12qb	"	17q	29q

*Note: The short arm of chromosome 8 (LG 19p) in Atlantic salmon and chromosome 20 (LG 17p) in rainbow trout are composed entirely of ribosomal DNA, and so are not counted as one of the 50 haploid chromosome arms. Table 2 is an updated version of part of Table 1 [11] with a couple of corrections. In that table, the homologies between rainbow trout 7p and 7q were assigned an inverted orientation. As shown here, rainbow trout LG 7p corresponds to Atlantic salmon LG 31 whereas rainbow trout LG 7q corresponds to Atlantic salmon LG 22qa. In addition, Atlantic salmon LG 1q corresponds to rainbow trout LG 29p (i.e., RT-29 arms were previously reported in an inverted orientation).
** It should be noted that there are only 29 linkage groups in the Atlantic salmon genetic map. The nomenclature for the linkage groups is historical, and linkage groups 26, 27, 29 and 30 no longer exist. Similarly, there are only 30 linkage groups in rainbow trout as linkage group 28 no longer exists.

ISSN: 2730-6844