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Vol. 43 No. 2, 2004
Nuclear DNA and Remarks on Chromatin Diminution in Cyclopoid Copepods
Andrey Konstantinovich Grishanin1,*, Hans-Uwe Dahms2 and Alexey Pavlovitch Akifiev1
1Vavilov Institute of General Genetics, Russian Academy of Sciences, ul. Gubkina 3, Moscow 117809, Russia
2AG Zoosystematik und Morphologie, University of Oldenburg, FB 7, D-26111 Oldenburg, Germany
Andrey Konstantinovich Grishanin, Hans-Uwe Dahms and Alexey Pavlovitch Akifiev (2004) The sizes of chromosomes and nuclear DNA were determined for German populations of Acanthocyclops viridis, Eucyclops macruroides, E. serrulatus, Cyclops insignis, and A. viridis and Russian populations of Macrocyclops albidus and Thermocyclops crassus. In contrast to German populations, the Russian populations of C. insignis show no chromatin diminution (CD). The absence of CD in Russian populations of C. insignis
elicited the supposition that these 2 populations are probably at the
early stages of speciation on the path towards speciation events. In P. affinis,
we noted a striking difference in the chromosomes and nuclear DNA
contents of embryonic cells compared to somatic cells of adults.
Key words: Genome size, Chromatin diminution, Cryptic speciation.
*Correspondence: Tel: 7-096-212-8319. Fax: 7-095-132-8962. E-mail:andreygrishanin@yahoo.com
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