FN Archimer Export Format PT J TI Comparative karyological study of cupped oyster species BT AF LEITAO, Alexandra BOUDRY, Pierre LABAT, JP THIRIOT-QUIEVREUX, C AS 1:1;2:2;3:1;4:1; FF 1:;2:;3:;4:; C1 Observ Oceanol, URA 2077, F-06230 Villefranche Sur Mer, France. IFREMER, Lab Genet Aquaculture & Pathol, F-17390 La Tremblade, France. C2 OBSERV OCEANOL VILLEFRANCHE, FRANCE IFREMER, FRANCE SI LA TREMBLADE SE PDG-DOP-DCN-AGSAE-LGP IF 0.737 TC 35 UR https://archimer.ifremer.fr/doc/1999/publication-2737.pdf LA English DT Article DE ;cupped oyster;chromosome;karyotype;NORs;cytotaxonomy;bivalvia AB Chromosomes of six cupped oyster species were studied using karyometric analysis alter conventional Giemsa staining, and silver staining, Karyotypes of Crassotrea angulata (nine metacentric and one submetacentric chromosome pairs), C. sikamea (nine metacentric and one submetacentric chromosome pairs), C. virginica (eight metacentric and two submetacentric chromosome pairs), C, ariakensis (eight metacentric and two submetacentric chromosome pairs), C, gasar (six metacentric and four submetacentric chromosome pairs), and Saccostrea commercialis (eight metacentric and two submetacentric chromosome pairs) are distinguishable by the number and position of the submetacentric chromosome pair and by the location of nucleolus organizer regions, Comparative karyological analysis of these six cupped oysters and of C. gigas was made using a Principal Component Analysis and a Hierarchical Clustering Analysis, Crassostrea gasar appears isolated trom the other oyster species, Then, two c1usters are separated. The first one groups C. gigas, C. angulata and C. sikamea, in which C. gigas is plesiomorphic, The second one consists of C, ariakensis, C. virginica and S, commercialis. Results are discussed with regards to oyster species relationships based on other genetic characters and to hybridization possibilities. PY 1999 SO Malacologia SN 0076-2997 PU Inst Malacol VL 41 IS 1 UT 000083146800007 BP 175 EP 186 ID 2737 ER EF