Karyotypes of two representative species of hynobiid salamanders, Hynobius nebulosus (Schlegel) and Hynobius naevius (Schlegel).

Seto, Takeshi; Utsunomiya, Yasuaki; Utsunomiya, Taeko

doi:10.2183/pjab.59.231

Cited by 10 publications

(7 citation statements)

References 5 publications

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“…Karyological analyses of Hynobius from Korea and Japan have been performed by a number of investigators (Azumi and Sasaki, 1971;Morescalchi et al, 1973Morescalchi et al, , 1979Ikebe and Kohno, 1979a, b;Kohno et al, 1983Kohno et al, , 1987Seto et al, 1983Seto et al, , 1986Seto et al, , 1987Seto et al, , 1988Seto and Matsui, 1984;Matsui et al, 1985;Ikebe et al, 1986Ikebe et al, , 1987Kuro-o et al, 1986Kuro-o et al, , 1987aYamamoto et al, 1988). These studies reported that the number of diploid chromosomes in the pond-type Hynobius (nine species) was 56, except for H. retard&us (40), and that of the mountainbrook-type Hynobius (four species) was 58, except for H. okiensis (56).…”

Section: Introductionmentioning

confidence: 99%

Cytogenetic studies of Hynobiidae (Urodela). X Morphological variation of chromosome 10 in ten pond‐type Hynobius from Korea and Japan, with comments on phylogenetic relationships

Ikebe

Kuro-o

Yamada

et al. 1990

J of Evolutionary Biology

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We have studied karyotypes of ten pond‐type Hynobius collected from 51 localities: H. leechii from Korea, and H. tsuensis, H. dunni, H. nebulosus, H. abei, H. tokyoensis, H. takedai, H. lichenatus, H. nigrescens and H. retardatus from Japan. C‐banding analyses have been performed on the specimens from 38 out of the 51 localities. Among the karyological variations observed, chromosome 10 showed intra‐ and interspecific variations in many species, which we considered suitable for phylogenetic analysis. Our phylogenetic inferences concerning the morphological variation of chromosome 10 in ten pond‐type Hynobius are summarized as follows: 1) similarity in the morphology and the amount of heterochromatin of chromosome 10 in species found in close geographic proximity to each other indicates a close phylogenetic relationship; 2) species distributed in widely separated geographic areas and yet with similar amounts of heterochromatin on chromosome 10 have conserved this chromosomal pattern from a common ancestor; 3) the main evolutionary changes of chromosome 10 are decreases in the C‐positive region and transformation of the biarmed type of this chromosome to the uniarmed type by a pericentric inversion involving the C‐positive region.

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Section: Introductionmentioning

confidence: 99%

Cytogenetic studies of Hynobiidae (Urodela). X Morphological variation of chromosome 10 in ten pond‐type Hynobius from Korea and Japan, with comments on phylogenetic relationships

Ikebe

Kuro-o

Yamada

et al. 1990

J of Evolutionary Biology

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“…Analyses with the conventional Giemsa method indicated that most of the salamanders belonging to the genus Hynobius had almost equal chromosome numbers, (2n = 56 and 58), and very similar karyo types, except for some minor dissimilarities (Ikcbe and Kohno, 1979a, b;Morescalchi et al, 1979;Seto et al, 1983;Seto and Matsui. 1984;Matsui et al.…”

Section: Discussionmentioning

confidence: 99%

“…nigrescens from Nikko (Tochigi), the small-sized chromosome group consisted of seven meta-or submetacentric pairs and eight acrocentric pairs. Seto et al (1983) reported that the small-sized chromosome group in H. nebulosus from Daito and Matsue (Shimane) consisted of five meta-or sub metacentric pairs and 10 acrocentric pairs. As regards H. nebulosus from Nagasaki (Nagasaki), H. tokyoen sis from Isumi (Chiba), and H. nigrescens from Nakakubiki (Niigata), we found that the small-sized group consisted of six meta-or submetacentric pairs and nine acrocentric pairs.…”

Section: Discussionmentioning

confidence: 99%

Cytogenetic studies of Hynobiidae (Urodela)

Kuro-o¹,

Ikebe

Kohno³

1987

Cytogenet Genome Res

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Chromosome analysis was done in salamanders belonging to the genus Hynobius using the R-banding (RBG) technique. The embryonic cells of H. leechii Boulenger from Korea and H. nebulosus (Schlegel), H. tokyoensis Tago, H. nigrescens Stejneger, and H. retardatus Dunn from Japan were cultured in medium containing 5-bromodeoxyuridine. R-banding patterns in these five species were analyzed, except for most of the small-sized chromosomes. Eighteen out of 28 chromosome pairs in H. leechii, H. nebulosus, H. tokyoensis, and H. nigrescens, and 16 out of 20 chromosome pairs in H. retardatus could be identified by their R-banding patterns. The R-banding patterns in H. leechii, H. nebulosus, H. tokyoensis, and H. nigrescens were very similar to one another as are their karyotypes. Among these four species, about 90% of the total lengths of the karyotypes in each species showed homoeologous R-banding patterns, while among all the five species, including H. retardatus, homoeologies decreased to about 65%. The results imply that H. leechii, H. nebulosus, H. tokyoensis, and H. nigrescens are extremely close to one another phylogenetically, and that H. retardatus is a near phylogenetic relation to the other species of this study.

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“…Among 20 Hynobius species recognized in Taiwan, Korea and Japan, the chromosome numbers of 19 have been examined (Azumi and Sasaki, 1971;Ikebe and Kohno, 1979a, b;Morescalchi et al, 1979;Seto et al, 1983Seto et al, , 1986Seto et al, , 1988Seto and Matsui, 1984a, b;Matsui et al, 1985;Ikebe et al, 1986Ikebe et al, , 1987Kohno et al, 1987;Seto and Utsunomiya, 1987;Yamamoto et al, 1988;Iizuka et al, 1989). Hynobius leechii, H. chinensis, H. amjiensis and H. mantchuricus have been recognized in mainland China (Zhao and Adler, 1993).…”

Section: Introductionmentioning

confidence: 99%

Chromosomes of Hynobius chinensis Günther and Hynobius amjiensis Gu from China, and Comparison with Those of 19 Other Hynobius Species

Ikebe¹,

Gu²,

Ruan³

et al. 1998

Zoological Science

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We report for the first time the chromosome numbers, karyotypes and C-banding patterns of Hynobius chinensis and Hynobius amjiensis from the middle-eastern region of mainland China. Both species had a diploid set of 56 chromosomes, with similar karyotypes. Among Hynobius species, the C-banding patterns of H. chinensis and H. amjiensis were the most similar to those of H. leechii from the northern region of South Korea. The chromosome number of H. chinensis and H. amjiensis was identical to that of 11 Hynobius species distributed throughout Korea and Japan. This identity indicates close phylogenetic relationships among the 13 species.

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Karyotypes of two representative species of hynobiid salamanders, Hynobius nebulosus (Schlegel) and Hynobius naevius (Schlegel).

Cited by 10 publications

References 5 publications

Cytogenetic studies of Hynobiidae (Urodela). X Morphological variation of chromosome 10 in ten pond‐type Hynobius from Korea and Japan, with comments on phylogenetic relationships

Cytogenetic studies of Hynobiidae (Urodela). X Morphological variation of chromosome 10 in ten pond‐type Hynobius from Korea and Japan, with comments on phylogenetic relationships

Cytogenetic studies of Hynobiidae (Urodela)

Chromosomes of Hynobius chinensis Günther and Hynobius amjiensis Gu from China, and Comparison with Those of 19 Other Hynobius Species

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