Heterogamety in the baltic glacial relict Saduria entomon (Isopoda

Valvifera)

Marta Hoover, Katarzyna Smolarz, MacIej Wołowicz

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This study describes the karyology of an isopod, Saduria entomon, and provides for the first time evidence of a XY/XX heterogamety for this species. The presented karyotype [56 (m + sm ) + 2 st + XX/XY] is characterised by the dominance of metacentric and submetacentric chromosomes and is considered as apomorphic. This is the first time a valviferan is described with an XX/XY system. Mitotic and meiotic heterogamety observed in S. entomon suggests more advanced evolution of sex determination within this species in comparison to other Isopoda. Based on Ag-staining the presence of secondary constrictions and satellites on the 22nd pair of homologous chromosomes was identified. Inter- and intra-individual variability in chromosome number (2n = 58, 2n = 59 or 2n = 61) was also observed. The between-species variation in heterogamety in isopods and the within-species variation in chromosomes numbers are discussed.

Original languageEnglish (US)
Pages (from-to)757-761
Number of pages5
JournalJournal of Crustacean Biology
Volume30
Issue number4
DOIs
StatePublished - Nov 1 2010

Fingerprint

Isopoda
chromosome
chromosome number
isopod
submetacentric chromosomes
metacentric chromosomes
karyology
karyotyping
dominance (genetics)
sex determination
karyotype
chromosomes
gender

All Science Journal Classification (ASJC) codes

  • Aquatic Science

Cite this

Hoover, Marta ; Smolarz, Katarzyna ; Wołowicz, MacIej. / Heterogamety in the baltic glacial relict Saduria entomon (Isopoda : Valvifera). In: Journal of Crustacean Biology. 2010 ; Vol. 30, No. 4. pp. 757-761.
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Heterogamety in the baltic glacial relict Saduria entomon (Isopoda : Valvifera). / Hoover, Marta; Smolarz, Katarzyna; Wołowicz, MacIej.

In: Journal of Crustacean Biology, Vol. 30, No. 4, 01.11.2010, p. 757-761.

Research output: Contribution to journalArticle

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