FN Archimer Export Format
PT J
TI Chromosome loss in bi-parental progenies of tetraploid Pacific oyster Crassostrea gigas
BT 
AF MCCOMBIE, Helen
   LAPEGUE, Sylvie
   CORNETTE, Florence
   LEDU, Christophe
   BOUDRY, Pierre
AS 1:1;2:1;3:1;4:1;5:1;
FF 1:PDG-DOP-DCN-AGSAE-LGP;2:PDG-DOP-DCN-AGSAE-LGP;3:PDG-DOP-DCN-AGSAE-LGP;4:PDG-DOP-DCN-AGSAE-LGP;5:PDG-DOP-DCN-AGSAE-LGP;
C1 IFREMER, Lab Genet & Pathol, F-17390 La Tremblade, France.
C2 IFREMER, FRANCE
SI LA TREMBLADE
SE PDG-DOP-DCN-AGSAE-LGP
IN WOS Ifremer jusqu'en 2018
IF 1.374
TC 25
UR https://archimer.ifremer.fr/doc/2005/publication-633.pdf
LA English
DT Article
DE ;Crassostrea gigas;Mitosis;Chromosome;Cytogenetics;Aneuploid;Polyptoid;Tetraploid;Oyster
AB Alterations of chromosome number have been observed in the somatic tissue of Crassostrea gigas diploids and artificial polyploids. Tetraploid oysters with abnormal chromosome numbers in some or all of their tissue are considered undesirable as parents either for triploids (produced via a cross with diploids and of aquacultural interest) or for tetraploid breeding. Aneuploid tetraploid oysters may confer the tendency to lose chromosomes and to revert to lower ploidy levels to their offspring. More directly, their offspring could have a lower ploidy because of potential links between somatic and gametic chromosome loss. The present study evaluated the phenomenon in six bi-parental tetraploid families bred from parents of differing somatic ploidy quality. The offspring were assessed over a year using chromosome counts. Differences between families and parental influence on chromosome loss were evaluated. This showed that chromosome loss occurred at high frequency in all families and that families differed in their composition of ploidy types. Triploidy was observed in four out of the six families. Comparison of data collected at 4 months and I year showed no worsening on this time-scale. The incidence of chromosome loss among families suggests a genetic basis to the phenomenon, although a direct relationship between the ploidy quality of the parents and that of the offspring was not observed. The origins and evolution of chromosome loss in polyploid oysters and the implications for breeding are discussed. 
PY 2005
PD JUL
SO Aquaculture
SN 0044-8486
PU Elsevier
VL 247
IS 1-4
UT 000229867500101
BP 97
EP 105
DI 10.1016/j.aquaculture.2005.02.003
ID 633
ER

EF