Colocalization of the ribosomal gene families in Conger conger (Anguilliformes, Congridae)

Figures & data

Figure 1 A, 45S rDNA FISH and B, sequential CMA₃ staining; C, 5S rDNA FISH and D, sequential CMA₃ staining; arrows indicate the short arm of pair 19. E, Pair 19 with different stainings, showing the region where the ribosomal gene families are colocalized; this region shows the length polymorphism between homologues.

Table I. Cytogenetic data on ribosomal gene families in Anguilliformes. Abbreviations: +, positivity; −, negativity; /, no data available; A, terminal in the short arm of a middle submetacentric; B, proximal in a large/middle acrocentric; C, the entire short arm of a small/middle acro‐subtelocentric; D, centromeric in a small acrocentric; E, proximal in the long arm of a large submetacentric.

Species	45S rDNA					5S rDNA			References
	Chr. location	Ag‐NOR	CMA3	FISH	C‐bands	Chr. location	CMA3	FISH
Anguillidae
Anguilla anguilla	A	+	+	+	+	D	−	+	1
A. rostrata	A	+	+	+	+	D	−	+	1
Congridae
Anago anago	B	+	/	/	+	/	/	/	2
Conger conger	C	+	+	+	+	C	+	+	3, present report
Muraenidae
Gymnothorax eurostus	C	+	/	/	/	/	/	/	4
G. kidako	C	+	/	/	/	/	/	/	4
G. unicolor	B	+	+	+	+	/	/	/	5, 6
Muraena helena	A	+	+	+	+	E	−	+	6, 7, 8, 9
M. pardalis	C	+	/	/	/	/	/	/	4
Ophichthidae
Echelus myrus	B	+	+	+	+	/	/	/	6, 10
Ophisurus serpens	A	+	+	+	−	/	/	/	6, 11
References: 1, reviewed in Salvadori et al. (1997); 2, Takai et al. (1987); 3, Salvadori et al. (1994); 4, reviewed in Klinkhardt et al. (1995); 5, Deiana et al. (1990); 6, Coluccia et al. (2001); 7, Cau et al. (1988); 8, Pichiri et al. (1995); 9, Salvadori et al. (1995); 10, Amores et al. (1995); 11, Thode (et al.) 1985.

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