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《ACTA HYDROBIOLOGICA SINICA》 1998-01
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A CYTOGENETIC STUDY ON THREE SPECIES OF TURTLE

Guo Chaowen, Wang Ming and Nie Liuwang(Department of Biology, Anhui Normal University, Wuhan 241000)  
The conventional karyotypes, G-bands, C-bands and Ag-NORs of three species of turtles have been studied. Platysternon megacephalum Gray has 2n =54(14M + 4ST + 8T + 28m), N. F. = 72, 7 + 6 + 14(Karyotypic formula). The No. 6 chromosome of group A has a secondary constriction (SC) in the q per. The Ag-NORs are on the No. 7 q ter of group A; Cuora amboinensis (Daudin) has 2n = 52(18M + 4ST+ 6T + 24m),N. F. = 74, 9 + 5 + 12. There are a pair of Ag-NORs in the No.7 q per of group A; Geoemyda spengleri Gmelin has 2n =52(16M + 4ST + 6T + 26m), N.F. = 72, 8 + 5 + 13. The No.7 p per of group A has a SC. The Ag-NORs with hereromorphic phenomenon located on the No.7 q per of group A.All of the centromeric regions of the chromosomes showed staining of C-positihve for these three species. Besides this, the telomeric C-bands was found at the No. 1 q ter of group A and the Nos.2,7 p q ter of group C in G. spengleri. The No.7 chromosome of group A of P. megacephalum and the No. 1 chromosome of group C of C. amboinensis showed whole staining of C-positive.The chromosomes of G-banded were analyzed. The results show that each homologous pair has its own special G-banded patterns, so is possible to be paired in the karyotype.
【Fund】: 国家自然科学基金
【CateGory Index】: Q959.4
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