Table 2

Known homologies of sex chromosomes in teleost fish

Species

Linkage group (LG)

Genes

Gac

Tni

Ola

Dre

TEL


Threespine stickleback

Gasterosteus aculeatus

XX/XY - LG 19

CYP19B

WT1A

LG 19

LG 19

LG 13

Sc14539

LG 6

LG 6

LG 25

LG 25

7


Ninespine stickleback

Pungitius pungitius

XX/XY - LG 12

PAX7

MITFB

LG 12

LG 12

LG 11

LG 9

LG 5

LG 7

LG11

LG 23

3


Nile tilapia

Oreochromis niloticus

XX/XY - LG 1

CYP19A

WT1B

LG 2

LG 2

LG 5

LG 5

LG 3

LG 3

LG 18

LG 18

7


Spotted tilapia

Tilapia mariae

ZZ/ZW - LG 3

TRP1/TYRP1A

DMO/DMRT4

LG 7

LG 7

Sc14681

Sc7577

LG 18

LG 18

LG 7

NF

?


Lake Malawi cichlids

non-OB phenotype

XX/XY - LG 7

IGF2

WT1A

LG 19

LG 19

LG 13

Sc14539

Sc1060

LG 6

LG 25

LG 25

7


Lake Malawi cichlids

OB phenotype

ZZ/ZW - LG 5

PAX7

Opsins

LG 12

LG 17

LG 11

LG 11

LG 5

LG 5

LG 11

LG 6,11

3


Tiger pufferfish

Takifugu rubripes

XX/XY - LG 19

overall

AMHR2

LG 17

LG 17

LG 11

LG 11

LG 5

LG 7

NA

NF

3


Japanese medaka

Oryzias latipes and

Oryzias curvinotus

XX/XY - LG 1

TYRP1B

LEF1

LG 9

LG 9

Sc13631

LG 18

LG 1

LG 1

LG 1

LG 1

4


Oryzias luzonensis

XX/XY - LG 12

SLC45A2

(b locus)

LG 14

LG 4

LG 12

LG 21

6


Oryzias mekongensis

XX/XY - LG 2

XDH

POMC

LG 1

LG 3

LG 2

NF

1


Oryzias minutillus

XX/XY - LG 8

HOXBA

SOX9B

LG 11

LG 11

Sc14653

LG 3

LG 8

LG 8

LG 3

LG 3

1


Oryzias dancena

XX/XY - LG10

SOX3

FGF9

LG 4

LG 4

LG 1

LG 1

LG 10

LG 10

LG 14

LG 14

5


Oryzias hubbsi

ZZ/ZW - LG 5

Opsins

WNT4A

LG 17

LG 17

LG 11

LG 11

LG 5

LG 5

LG 6,11

LG 11

3


Oryzias javanicus

ZZ/ZW - LG 16

HOXAB

WNT4B

RSPO1

LG 10

NF

LG 20

LG 8

UN

NF

LG 16

LG 16

LG 16

LG 16

LG 16

LG 16

8


Guppy

Poecilia reticulata

XX/XY - LG 12

SLC45A2

LG 14

LG 4

LG 12

LG 21

6


Platyfish

Xiphophorus maculatus

XX/XY - LG 24

MC4R

LG 21

Sc14565

LG 20

LG 2

12


DMRT1

LG 13

LG 12

LG 9

LG 5

6


The positions of DMRT1 and various sex-linked genes in teleost fish species were identified by BLAT searches of the Gasterosteus aculeatus (Gac), Tetraodon nigrividis (Tni), Oryzias latipes (Ola), and Danio rerio (Dre) genomes in the Ensembl genome browser release 56. The positions of genes are indicated by linkage groups (LG), unless the gene was not found in a genome assembly (NF), in an unassembled region of the genome (UN), or on a scaffold (Sc) that has not yet been assigned to a linkage group. The homologies between different fish sex chromosomes can be seen in the column indicating its ancestral teleost protokaryotype (TEL), which was inferred on the basis of the assignment of sex-linked genes to the Tni, Ola, and Dre linkage groups [67]. AMHR2, anti-Müllerian hormone receptor, type II; CYP19A, cytochrome P450, family 19, paralogous gene a; CYP19B, cytochrome P450, family 19, paralogous gene b; DMRT4, doublesex and mab-3 related transcription factor 4; HOXAB, Hox cluster A, paralogous subgroup B; HOXBA, Hox cluster B, paralogous subgroup A; IGF2, insulin-related growth factor 2; LEF1, lymphoid enhancer-binding factor 1; MITFB, microphthalmia-associated transcription factor b; PAX7, paired box 7; POMC, proopiomelanocortin; MC4R, melanocortin 4 receptor; SLC45A2, solute carrier family 45, member 2; TYRP1A, tyrosinase-related protein 1; WT1A, Wilms tumor 1a; WT1B, Wilms tumor 1b; XDH, xanthine dehydrogenase.

Marshall Graves and Peichel Genome Biology 2010 11:205   doi:10.1186/gb-2010-11-4-205