Cah. Biol. Mar. (2002) 43 : 17-26 Review of the literature on bivalve cytogenetics in the last ten years Catherine THIRIOT-QUIEVREUX Observatoire Océanologique, Université P. et M. Curie – CNRS - INSU, BP 28, 06230 Villefranche-sur-Mer, France Fax: (33) 4 93 76 38 48; E-mail:
[email protected] Abstract: This paper provides a review of the studies on bivalve chromosomes since 1992, in order to gather available data and to highlight the recent progress in different fields of cytogenetics: karyotype and chromosome markers, genome size, aneuploidy, natural and induced polyploidy, and hybridization. Résumé: Revue des travaux des dix dernières années sur l’étude cytogénétique des bivalves. Cet article présente une revue sur l’étude des chromosomes des bivalves depuis 1992 afin de rassembler les données disponibles et de souligner les pro- grès récents dans les différents domaines de la cytogénétique : caryotype et marqueurs chromosomiques, taille du génome, aneuploïdie, polyploïdie naturelle et induite, et hydridisation. Keywords: Bivalvia, Chromosomes, Cytogenetics Introduction review, 1985). Later, the development of banding techniques which allowed chromosome identification in Cytogenetic studies encompass different levels of biological karyotypes began to be applied in bivalves (see Thiriot- organization ranging from the morphological to the Quiévreux review, 1994). Since these reviews, the study of molecular, depending on the applicable technology. bivalve chromosomes has greatly progressed in Chromosomes can be studied as a morphological karyological as well as molecular information, as a result of manifestation of the genome in terms of their routine application of several banding techniques and the microscopically visible size, shape, number and behaviour development of techniques for in situ hybridization.