Figure 5: The karyotype of female Asian arowana contains a large, putative W chromosome. | Scientific Reports

Figure 5: The karyotype of female Asian arowana contains a large, putative W chromosome.

From: The Asian arowana (Scleropages formosus) genome provides new insights into the evolution of an early lineage of teleosts

Figure 5

(A) A typical female karyotype showing 24 pairs of chromosomes, among them a pair with unequal sized chromosomes. A large acrocentric chromosome with a substantial heterochromatic block in the pericentromere region was identified as a putative W chromosome. Chromosome pairs 1–9 are metacentric/submetacentric (m/sm), 10–16 are subtelocentric (st) and 17–24 are acrocentric (a). (B) Chromomycin A3 staining. White arrowhead indicates the female-specific, putative W chromosome. (C) Metaphase chromosomes stained with DAPI (blue) and telomere probe (green). Bars are 5 μm for all panels.

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