Further karyological and bioreproductive observations on strains of the planarian Dugesia benazzii from Corsica. The present paper reports on the analysis of the karyological and reproductive characteristics of the planarian Dugesia benazzii from Corsica. The observations, extended to new strains collected during 1977, confirm previous data about the wide diffusion of diploid polysomic races in which B-chromosomes also occur. These populations reproduce mainly or exclusi vely by fission. The correlation among fissioning, numerical increase of the chromosomes and presence of B-chromosomes, however, is not constant and probably depends on a specific genetic constitution.
Nuove osservazioni cariologiche e di biologia riproduttiva su popolazioni di Dugesia benazzii (triclade paludicolo) della Corsica)
DERI, PAOLO
1981-01-01
Abstract
Further karyological and bioreproductive observations on strains of the planarian Dugesia benazzii from Corsica. The present paper reports on the analysis of the karyological and reproductive characteristics of the planarian Dugesia benazzii from Corsica. The observations, extended to new strains collected during 1977, confirm previous data about the wide diffusion of diploid polysomic races in which B-chromosomes also occur. These populations reproduce mainly or exclusi vely by fission. The correlation among fissioning, numerical increase of the chromosomes and presence of B-chromosomes, however, is not constant and probably depends on a specific genetic constitution.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
