Distribution of ancestral proto-Actinopterygian chromosome arms within the genomes of 4R-derivative salmonid fishes (Rainbow trout and Atlantic salmon)

Table 1 Ancestral linkage group arm distributions within the salmonid genome.

Ancestral Linkage Groups	Danio rerio linkage groups¹	Oryzias latipes linkage groups¹	Number of whole linkage group arms⁴	Number of partial linkage group arms⁴	Partial arms syntenic only in Drer or Olat
A	17, 20	22, 24	2	1	1
B	16, 19, (1)³	11, 16	4	0	0
C	6, 9 (11)	2, 21	3 (2 = 1)²	2	1
D	12, 13, (17, 20, 1)	15, 19 (1)	3	5	1
E	3, 12, (1)	8, 19, (1)	2	3	0
F	1, (7)	1, 18 (10)	4	0	0
G H	14, 15, 10, 21, (1, 5)	13, 14 (10, 11)	5	2	2
I	5, 8, 10, 21	9, 12	3	2	0
J	7, 18, 25, (19)	3, 6	2	4	0
K	4, (18, 24, 25)	6, 23	2	3	0
L	11, 23 (6, 8, 17, 22, 24)	5, 7	2	3	0
M	2, 22, 24 (6, 8, 11)	4, 17, 20 (13)	5	3	0

¹ Linkage group arm affinities within zebrafish and medaka to their ancestral origins are from the model presented by Nakatani et al. 2007 [10], and data from the current study. The number of whole and partial arm affinities to these chromosomal regions in the two salmonid species are indicated in the last 3 columns.
² RT-5 represents a putative whole arm inversion (i.e., 2 of the whole arms indicated may only represent one ancestral arm).
³ Linkage groups specified in parentheses indicate descendancy of only minor ancestral chromosomal segments within the linkage groups specified.
⁴ Indicates that number of whole or partial chromosome arms in rainbow trout/Atlantic salmon that are syntenic with the ancestral linkage group designated in the first column.

ISSN: 1471-2164