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中国五种锄足蟾科无尾两栖动物的细胞遗传学研究 被引量:4

THE CYTOGENETIC STUDY ON FIVE PELOTOID SPECIES OF ANURA IN CHINA
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摘要 本文对中国5种锄足赡科无尾两栖动物的骨髓细胞有丝分裂中期作了细胞遗传学研究,内容包括核型、Ag-NORs和C-带。研究结果表明景东角蟾:Zn=26(20M+4SM+2ST),5+8,SC和Ag-NORs位于6p(per),同时呈C-带正染。C-带以着丝点区域正染为主;粗皮角蟾:Zn=26(20M+6SM),5+8,Ag-NORs在6q(inter),以着丝点C-带为主,但Nos.12,13有明显的端位C-带;小口拟角蟾:Zn=26(24M+ZSM),6+7,SC和Ag-NORs位于5p(inter),有十分发达的着丝点C-带;利川齿蟾:Zn=26(22M+4SM),6+7,SC和Ag-NORs位于时6q(inter),以着丝点C-带为主;沙巴拟髭蟾:2n=26(22M+4SM),6+7,SC和Ag-NORs位于6q(inter),着丝点C-带为主,有明显的染色体数目变异。有雌雄二性个体做实验的3个种均未发现异形性染色体。 The cytogenetic study on the karyotypes,Ag-NORs,C-banding and other features on five pelobatoid toad species in China had been made using the method of vapour fixation of mitosis metaphase of the marrow cells.The results showed that Megophrys jingdongensis have 2n=26(20M+4SM+2ST),5+8,SC and Ag-NORs localized on 6pper at which C-positive staining also. The centromeric C-bands dominated.M.palpebralispinosa 2n= 26(20M+6SM, 5+8, 6qinter is distinct Ag-staining.Except for Nos.12,13,which has obvious terminal C-staining,all the chromosomes presented centromeric C-bands.Ophryphyne microstoma 2n=26(24M+2SM),6+7,SC and Ag-NORs are on 5pinter.Specially there are quite developed C-bands on all the centromeric regions.Oreolalax lichuanensis 2n=26(22M+4SM),6+7,SC and Ag-NORs located on 6qinter Leptobrachium chapeensis 2n=26(22M+4SM), 6+7,same location of Ag-NORs and C-bands with the former species it has,the varied chromosomes(26,27,28)occured,but the exceed chromosomes are without C-staining.No heteromorphic chromosomes related to the sexuality were found in three species with both sexes.
机构地区 云南大学生物系
出处 《Zoological Research》 CAS CSCD 1996年第2期173-178,共6页 动物学研究(英文)
基金 国家自然科学基金
关键词 两栖纲 锄足蟾 细胞遗传学 Karyotype,Ag-NORs,C-bands,Pelobatoid frog(toad)
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  • 1李树深,费梁,叶昌媛.中国五种高山锄足蟾的核型、Ag-NORs和C-带的研究[J].动物学报,1990,36(3):315-323. 被引量:7
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