Japanese Journal of Veterinary Research;Volume 30, Number 3-4

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CHROMOSOMAL ANALYSIS OF THE JAPANESE RACCOON DOG BASED ON THE G- AND C-BANDING TECHNIQUES

YOSHIDA, Mitsutoshi;NODA, Hiroshi;NAGAHATA, Hajime;KANAGAWA, Hiroshi;ISHIKAWA, Tsune

Permalink : http://hdl.handle.net/2115/2264
JaLCDOI : 10.14943/jjvr.30.3-4.68

Abstract

The chromosomes of two subspecies of the Japanese raccoon dog (Nyctereutes procyonoides viverrinus ; 4 individuals & N. p. albus ; 2 individuals) were analysed using the G- and C-banding techniques. The Japanese raccoon dog had 42 chromosomes in dipliod number and the fundamental arm number (NF, 'nombre fundamental') was 70. The autosomes comprised 13 pairs of meta or submetacentrics and 7 pairs of acrocentrics. The X chromosome was metacentric and intermediate in size between Nos. 12 and 13 while the Y was the smallest acrocentric with a satellite. The G- and C-banding patterns of N.p. albus were similar to those of N.p. viverrinus. The homologous pair of chromosomes could be identified by the G-banding pattern. Most of the chromosomes were C-band positive and contained centromeric heterochromatin. In one male individual (N.p. viverrinus), modal chromosome numbers showed 41,XY because of the elimination of one acrocentric autosome. However, this male did not show any abnormal features except in diploid number.

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