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Studies on the karyotype and gametogenesis in Trichuris muris

Published online by Cambridge University Press:  05 June 2009

M. Špakulová ,
I. Králová  and
C. Cutillas
M. Špakulová
Affiliation:
Parasitological Institute, SAS, Hlinkova 3, 040 01 Košice, Slovak Republic
I. Králová
Affiliation:
Parasitological Institute, SAS, Hlinkova 3, 040 01 Košice, Slovak Republic
C. Cutillas
Affiliation:
Sevilla University, Faculty of Pharmacy, Department of Parasitology, Prof. García Gonzáles S/N, 41012 Sevilla, Spain
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Abstract

The cytological study of males and females of Trichuris muris (Schrank, 1788) revealed the diploid number of chromosomes to be 2n=6. The sex determining mechanism was XX♀/XY♂. All the chromosomes were subtelocentric. Sex chromosomes formed the smallest pair, but X and Y were difficult to distinguish morphologically. Chromosome changes during gametogenesis in both sexes followed a classical pattern except in the male prophase and metaphase I. Four male autosomes formed two bivalents, each with one proximal chiasma with strict localization, while sex chromosomes X and Y formed two univalents. Female chromosomes formed three rod bivalents type, which possessed three, two and two chiasmata.

Type
Research Papers
Information
Journal of Helminthology , Volume 68 , Issue 1 , March 1994 , pp. 67 - 72
Copyright
Copyright © Cambridge University Press 1994

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