Distribution of C-band heterochromatin in the ZW sex chromosomes of European and American eels (Anguillidae, Teleostomi)

Park, E.-H.; Grimm, H

doi:10.1159/000131642

Cited by 22 publications

(17 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1972;Legendre, 1975;Passakas, 1976Passakas, , 1978Passakas, , 1981Sola et al, 1980;Park and Grimm. 1981).…”

unclassified

Sex determination in the European eel (<i>Anguilla anguilla, </i>L.)

Wiberg¹

1983

Cytogenet Genome Res

View full text Add to dashboard Cite

Metaphase chromosomes from cultured blood cells of female, male, and hermaphroditic European eels were analyzed. In addition, both gonads from each of the specimens were examined microscopically to ensure correct sexing. The karyological investigation revealed that in some of the specimens a heteromorphic chromosome pair was present. This heteromorphism appeared in both sexes and in the hermaphrodite. C-banding and silver nitrate staining demonstrated that the heteromorphism was due to quantitative differences in constitutive heterochromatin and nucleolar organizing regions in the short arm of chromosome 8. In G-banded preparations it was demonstrated that, except for the heteromorphism mentioned, the karyotypes from both sexes and the hermaphrodite were identical. With the G-band technique it was also easily demonstrated that both the largest metacentric (No. 1) and the smallest metacentric (No. 11) had homologs. Therefore, in contrast to some earlier reports which claimed that these two chromosomes were a heteromorphic pair of sex chromosomes, it is concluded that Anguilla anguilla has no heteromorphic sex chromosomes. The implication of these findings are discussed in relation to the many reports of strongly skewed sex ratios found in commercial eel farms. It is tentatively hypothesized that sex determination in A. anguilla may be metagamic and that sex inversion may occur in this species.

show abstract

“…1972;Legendre, 1975;Passakas, 1976Passakas, , 1978Passakas, , 1981Sola et al, 1980;Park and Grimm. 1981).…”

unclassified

Sex determination in the European eel (<i>Anguilla anguilla, </i>L.)

Wiberg¹

1983

Cytogenet Genome Res

View full text Add to dashboard Cite

show abstract

“…Morphologically differentiated sex chromosomes, previously claimed by other authors (Passakas, 1981;Park & Grimm, 1981), are absent (Sola etal, 1984).…”

Section: Karyotypementioning

confidence: 56%

Gytogenetic and molecular characteristics of Atlantic eels (Anguilla anguillaand A.rostrata) genome

Salvadori

Cau

Deiana

et al. 1998

Italian Journal of Zoology

View full text Add to dashboard Cite

The Atlantic eels, Anguilla anguilla and A. rostrata, have partially overlapping spawning sites and show incomplete reproductive isolation as testified by the presence of hybrids at low frequency. Nevertheless, significant genetic differences between the two species have been pointed out by data on biochemical polymorphisms and mitochondrial DNA. This study reviews the cytogenetic and molecular data and points out differences and similarities between the two species.

show abstract

“…Clear G-bands were published for A. anguilla (Wiberg, 1983), A. rostrata (Sola et al, 1984) and more recently for some North American cyprinids (Gold et al, 1990;Gold & Li, 1991). Chiarelli et al, 1969Passakas, 1981So\iet al, 1980Park & Grimm, 1981Wiberg, 1983Ohno et al, 1973Solaef al, 1980Park & Grimm, 1981Passakas, 1981Nishikawa et al, 1971Solaef al, 1980Nishikawa et al, 1971Park & Kang, 1979Subrahmanyah & Ramamoorthi, 1971Park & Kang, 1979Ojima & Ueda, 1982Takai & Ojima, 1985Takai & Ojima, 1985Takai et al, 1987Nogusa, I960 Cau et al, 1988Takai & Ojima, 1985Deiana et al, 1990Takai & Ojima, 1985«/., 1991Ojima, 1985Ojima, 1985Nogusa, I960 Ojima, 1985Nishikawa & Sakamoto, 1977Thodeetal, 1985Murofushi etal, 1984 -data not reported NOR chromosomal patterns in Anguilliformes have been studied on only six species from different families, all of which presented a single pair of NOR chromosomes. NOR was located as follows: a) terminally on the short arm of a small submetacentric chromosome in A. anguilla (Wiberg, 1983), A. rostrata (Sola et al, 1984), M. helena (Cau et al, 1988) and Ophisurus serpens (Thode et al, 1985); b) terminally on the short arm of an acrocentric chromosome in C. conger (present report); c) interstitially, adjacent to the centromere on the long arm of a large acrocentric chromosome in Gymnothorax unicolor (Deiana et al, 1990) and Anago anago …”

Section: Discussionmentioning

confidence: 99%