Cytogenetical studies on fishes. V. Multiple sex chromosome mechanism (XX-Y) found in two dragonet fishes.

Murofushi, Makoto; Nishikawa, Shohei; Yosida, Tosihide H.

doi:10.2183/pjab.59.58

Cited by 10 publications

(10 citation statements)

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“…Perciformes is the largest fish group with 160 families and about 10,033 species (Nelson 2006), but multiple sex chromosomes have been reported in ten species from five families (Suzuki et al 1988;Pezold 1984;Murofushi et al 1983;Caputo et al 2001;Morescalchi et al 1992). In these species, four species from three families may have the neo-Y simply resulting from the occurrence of Robertsonian rearrangement as well as in L. quinquelineatus in this study (Suzuki et al 1988;Pezold 1984;Murofushi et al 1983). On the other hand, Parablennius tentacularis in Blenniidae had the neo-Y resulting from the occurrences of tandem fusion and heterochromatinization (Caputo et al 2001).…”

Section: Discussionmentioning

confidence: 99%

Multiple sex chromosome system of X1X1X2X2/X1X2Y type in lutjanid fish, Lutjanus quinquelineatus (Perciformes)

Ueno

Takai

2007

Genetica

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The karyotype and other chromosomal markers as revealed by C-banding and Ag-staining were studied in Lutjanus quinquelineatus and L. kasmira (Lutjanidae, Perciformes). While in latter species, the karyotype was invariably composed of 48 acrocentric chromosomes in both sexes, in L. quinquelineatus the female karyotype had exclusively 48 acrocentric chromosomes (2n = 48) but that of the male consisted of one large metacentric and 46 acrocentric chromosomes (2n = 47). The chromosomes in the first meiotic division in males showed 22 bivalents and one trivalent, which was formed by an end-to-end association and a chiasmatic association. Multiple sex chromosome system of X(1)X(1)X(2)X(2)/X(1)X(2)Y type resulting from single Robertsonian fusion between the original Y chromosome and an autosome was hypothesized to produce neo-Y sex chromosome. The multiple sex chromosome system of L. quinquelineatus appears to be at the early stage of the differentiation. The positive C-banded heterochromatin was situated exclusively in centromeric regions of all chromosomes in both species. Similarly, nucleolus organizer region sites were identified in the pericentromeric region of one middle-sized pair of chromosomes in both species. The cellular DNA contents were the same (3.3 pg) between the sexes and among this species and related species.

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Section: Discussionmentioning

confidence: 99%

Multiple sex chromosome system of X1X1X2X2/X1X2Y type in lutjanid fish, Lutjanus quinquelineatus (Perciformes)

Ueno

Takai

2007

Genetica

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“…2). In comparison with the family Callionymidae, it is a different diploid chromosome number compared with Eleutherochir mirabilis, 2n=36 (Sawada and Sakamoto 1980); Repomucenus beniteguri, 2n=37-38 (Murofushi et al 1983); R. huguenini, 2n=32 (Murofushi et al 1984); R. ornatipinnis, 2n=37-38 (Murofushi et al 1983) and R. richardsonii, 2n=38 (Murofushi et al 1983, Ojima andKikuno 1987).…”

Section: Resultsmentioning

confidence: 99%

“…The chromosomes consist of 36 telocentric chromosomes. Murofushi et al (1983) reported the chromosome of the Repomucenus beniteguri, R. huguenini, R. ornatipinnis and R. richardsonii from Japan, which were investigated by using conventional staining and Ag-NOR staining techniques. The diploid chromosome numbers were 2n=37-38, 32, 37-38 and 38, respectively and the NFs were 38, 34, 38 and 38, respectively.…”

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confidence: 99%

First Report of Chromosome Analysis of Two Dragonets (Perciformes, Callionymidae)

et al. 2017

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We report the first chromosome analysis in the ocellated dragonet (Synchiropus ocellatus) and picturesque dragonet (S. picturatus) from Thailand. Kidney cell samples were taken from five male and five female fishes. The mitotic chromosome preparation was prepared directly from kidney cells. Conventional and Ag-NOR staining techniques were applied to stain the chromosomes. The results showed that the diploid chromosome number of S. ocellatus and S. picturatus were 2n=40, and the fundamental number (NF) was 40 in both males and females. The chromosomes were present as large telocentric, medium telocentric and small telocentric chromosomes in numbers of 16-18-6 and 14-24-2, respectively. No morphological difference was identified between sex chromosomes of male and female specimens. After Ag-NOR banding technique, a single pair of nucleolar organizer regions (NORs) was observed on the long arm centromeric region of large telocentric chromosome pair 5 in S. ocellatus and chromosome pair 4 in S. picturatus. The karyotype formulas could be deduced as:

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“…Consequently a characteristic sex trivalent results in male meiosis through synapsis of the X 1 , X 2 and neo-Y sex chromosomes [White, 1973]. In fish, the X 1 X 1 X 2 X 2 /X 1 X 2 Y system has already been described in species from different families [Murofushi et al, 1983;Pezold, 1984;Suzuki et al, 1988;Morescalchi et al, 1992;Almeida-Toledo et al, 2000;Bertollo et al, 2000Bertollo et al, , 2004Caputo et al, 2001;Ueno and Takai, 2008]. In several cases, the neo-Y is a metacentric chromosome, while the X 1 and X 2 are acrocentric ones, suggesting the occurrence of Robertsonian rearrangements.…”

Section: Discussionmentioning

confidence: 99%

Chromosomal Distribution of Repetitive DNA Sequences Highlights the Independent Differentiation of Multiple Sex Chromosomes in Two Closely Related Fish Species

Cioffi

Molina

Moreira‐Filho

et al. 2011

Cytogenet Genome Res

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The arrangement of 6 repetitive DNA sequences in the mitotic and meiotic sex chromosomes of 2 Erythrinidae fish, namely Hoplias malabaricus and Erythrinuserythrinus, both with a multiple X₁X₁X₂X₂/X₁X₂Y sex chromosome system, was analyzed using fluorescence in situ hybridization. The distribution patterns of the repetitive sequences were distinct for each species. While some DNA repeats were species-specific, others were present in the sex chromosomes of both species at different locations. These data, together with the different morphological types of sex chromosomes and the distinct chromosomal rearrangements associated with the formation of the neo-Y chromosomes, support the plasticity of sex chromosome differentiation in the Erythrinidae family. Our present data highlight that the sex chromosomes in fish species may follow diverse differentiation patterns, even in the same type of sex chromosome system present in cofamiliar species.

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Cytogenetical studies on fishes. V. Multiple sex chromosome mechanism (XX-Y) found in two dragonet fishes.

Cited by 10 publications

References 0 publications

Multiple sex chromosome system of X1X1X2X2/X1X2Y type in lutjanid fish, Lutjanus quinquelineatus (Perciformes)

Multiple sex chromosome system of X1X1X2X2/X1X2Y type in lutjanid fish, Lutjanus quinquelineatus (Perciformes)

First Report of Chromosome Analysis of Two Dragonets (Perciformes, Callionymidae)

Chromosomal Distribution of Repetitive DNA Sequences Highlights the Independent Differentiation of Multiple Sex Chromosomes in Two Closely Related Fish Species

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