Does apomixis occur to cause genomic duplication and clonal reproduction in sturgeons?

可能参与的“无融合生殖”，导致克隆繁殖和多倍体的植物，在鲟鱼物种进行了调查。通过DNA含量、流式细胞术和包括FISH在内的分子细胞遗传学分析的基因组大小估计清楚地显示了不同物种之间倍性状态的升高和降低，以及在人工繁殖的同种和杂交后代中发生遗传二倍体和四倍体。结果表明，倍性变异应该发生在现有的鲟鱼物种。

Possible involvement of "apomixis", which causes clonal reproduction and polyploidy in plants, was investigated in sturgeon species. Genome size estimation by DNA content flow cytometry and molecular cytogenetic analyses including FISH clearly showed elevation and reduction of ploidy status among different species as well as occurrence of genetic diploid and tetraploid in artificially propagated con-specific and hybrid progeny. The results suggest ploidy variation should happen in present sturgeon species.