South China Sea Institute of Oceanology;
Chinese Academy of Sciences;
Guangzhou 510301;
South China Sea Institute of Oceanology;
Chinese Academy of Sciences;
Guangzhou 510301neuploidy embryos of Pinctada martensii Dunker are produced during tetraploid induction by inhibiting the first polar body in eggs from triploid fertilized with haploid sperms with cytochalasin B treatment. Chromosome analysis reveals that there are 88.18±6.79% aneuploidy embryos;
and 28.70% aneuploids in pearl oysters of one-year age. These aneuploids have five chromosomal conditions;
such as 2n + 1(29);
2n + 2 (30);
3n-2 (40);
3n -1(41) and 3n + 1 (43). Results of growth measurement show that there is no significant difference between aneuploids (as a group) and diploids in body size and weight (p > 0.10);
but the aneuploide is obviously different from triploid (p < 0.01). The mean body size and weight of aneuploids in diploid condition (2n ± 1 and 2n ± 2) are significantly smaller than those of diploids (p < 0.01);
but aneuploids within triploid condition (3n ± 1 and 3n ± 2) are not smaller than diploids in body size and weight (p > 0.1).This study indicates Pinctada martensii Dunker could tolerate aneuploidy by 7 - 14% of the haploid genome;
and that aneuploids of this species are viable under certain conditions.;
aneuploid; triploid; Pinctada; martensii; Dunker;