Table 1

Chromosomal formula, sex chromosome system occurrence, W-specific probe sites and 18S rDNA sites on the chromosomes of the Characidium species/populations analysed.

Species

River

Chromosomal Formula

Sex System

W probe sites

18S rDNA sites/localization

Figure 3

relation


C. zebra

Passa Cinco

♂ ♀ 32 m+18 sm

Absent

Dispersed in autosomes

23 pair/subterminal

(a)

C. lauroi

Grande stream

♂ 32 m+18 sm

♀ 31 m+18 sm+1st

ZZ/ZW

Autosomal and dispersed in the W chromosome

Z and W/terminal

(b)

C. gomesi

Alambari

♂ ♀ 32 m+18 sm

ZZ/ZW

Z in proximal region of the long arm, entire m W chromosome and some terminal minor sites over autosomes

Z and W/terminal and 19 pair/terminal in just one homologue in males

(c and d)

C. gomesi

Grande

♂ ♀ 32 m+18 sm

ZZ/ZW

Z in proximal region of the long arm, entire m W chromosome and some terminal minor sites over autosomes

17 pair/terminal

(e and f)

C. gomesi

Minhoca stream

♂ ♀ 32 m+18 sm

ZZ/ZW

Z in proximal region of the long arm, entire m W chromosome and some terminal minor sites over autosomes

17 pair/terminal

(g)

C. gomesi

Verde

♂ 32 m+18 sm

♀31 m+18 sm+1st

ZZ/ZW

Z in proximal region of the long arm, entire st W chromosome and some terminal minor sites over autosomes

17 and 22 pairs/terminal and just one homologue of pairs 1 and 20/terminal

(h)


Machado et al. BMC Genetics 2011 12:65   doi:10.1186/1471-2156-12-65

Open Data