蛾螺科三种螺的核型观察

OBSERVATION OF KARYOLOGICAL IN THREE SPECIES OF BUCCINIDAE (MOLLUSCA: NEOGASTROPADA)

本文介绍了蛾螺科三种螺的核型。水泡蛾螺(Buccinum pcmphigum)为2n=30,染色体的形态分类组成为16m+10sm+4st,NF=56;Plicifusus scissuratus为2n=34,染色体的形态分类组成为20m+10sm+4st,NF=64;香螺(Neptumea cumingi)为2n=60,染色体的形态分类组成为30m+22sm+8st,NF=112。 蛾螺科核型分析,显示贝类染色体数目及其形态与贝类进化有关。

This paper reports the chromosome preparation and karyotypc studies of the three species in Buccinidae. The gonads were dissected from the animals and chromosome slides were made. Buccinum pemphigum. The diploid number was found to be 30 and the total number of chromosomal arms (NF) to be 56. All the chromosomes matched into 15 pairs, divided into three groups. 8 pairs of metaccntric chromosomes, 5 pairs of submetacentric chromosomes, and 2 pairs of telocentric chromosome. Plicifusus scissuratus. The diploid chromosome number was found to be 34, and the total number of chromosomal arms (NF) to be 64. All the chromosomes could be matched into 17 pairs, divided into three types. 10 pairs of metaccntric chromosomes, 5 pairs of submetacentric chromosomes, and pairs of 2 telocentric chromosomes. Neptunea cumingi: The diploid chromosome number was found to be 60 and the total number of chromosomal arms (NF) to be 112. All the chromosomes could be matched into 30 pairs, divided into three types. 15 pairs of metacentric chromosomes, 11 pairs of submtacentric chromosomes, and 4 pairs of telocentric chromosomes. The evolution of gastropoda relates, presumably, to the increase of the number of chromosomes.