| Zheng Jiasheng,Wang Meilin,Guo Danhong,Xu Ximind,Gao Qinglan. 1996. Comparative research on karyotype in three species of Arcidae. Acta Oceanologica Sinica, (4):529－538 |
| Comparative research on karyotype in three species of Arcidae |
| Comparative research on karyotype in three species of Arcidae |
| Received:January 05, 1995 Revised:March 15, 1995 |
| DOI： |
| Key words:T. granosa S. subcrenata S. broughtonii chromosome karyotype |
| 中文关键词: T. granosa S. subcrenata S. broughtonii chromosome karyotype |
| 基金项目:This research was supported by the National Natural Science Foundation of China under contract No, 49376275 & No.49493400 and BMFT of Germany. |
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| Abstract: |
| By air-dry method, the karyotype from gill cell in three clams of Bivalvia Pterimorphia Arcidae,Tegillarca granosa, Scapharca subcrenata and S. broughtonii. Was studied. Their chromosome number(2n) and fundamental number (NF) are equal to each other. But their karyotype is different. In T. grunasa. it is 2n=38, 28m+10sm; In S. subcrenata 2n=38, 14m+22sm+2st. In S. broughtonii 2n=38, 12m+20sm+6st. T.granosa has no subtelocentric (st) chromosome. S. subcrenata has one pair and S. broughtonii has three paris of st. Middle centric (m) and submiddle centric chromosome are major type in karyotype of three species of Arcida; the lengths of chtotnosomes from the largest to the smallest changed gradually. The absolute length of the maximum chromosome in all three species do not exceed 5 μm and the minimum chromosome is about 2 μm. Inversion pericentric perhaps plays an important role in the evolution of chromosome. Hybridization among the three species of Arcidae is possible. |
| 中文摘要: |
| By air-dry method, the karyotype from gill cell in three clams of Bivalvia Pterimorphia Arcidae,Tegillarca granosa, Scapharca subcrenata and S. broughtonii. Was studied. Their chromosome number(2n) and fundamental number (NF) are equal to each other. But their karyotype is different. In T. grunasa. it is 2n=38, 28m+10sm; In S. subcrenata 2n=38, 14m+22sm+2st. In S. broughtonii 2n=38, 12m+20sm+6st. T.granosa has no subtelocentric (st) chromosome. S. subcrenata has one pair and S. broughtonii has three paris of st. Middle centric (m) and submiddle centric chromosome are major type in karyotype of three species of Arcida; the lengths of chtotnosomes from the largest to the smallest changed gradually. The absolute length of the maximum chromosome in all three species do not exceed 5 μm and the minimum chromosome is about 2 μm. Inversion pericentric perhaps plays an important role in the evolution of chromosome. Hybridization among the three species of Arcidae is possible. |
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