| 摘要: |
| 研究了11头（6♂5♀）岭南牛的核型、G型、C带和Ag-NORｓ。结果发现，岭南牛群体内Y染色体存在多态性，Y染色体有中和近端着丝粒染色体，中着丝粒Y染色体的G带和C带与普通牛（Bos taurus）相同，近端着丝粒Y染色体G带和C带与瘤牛（Bos indicus）相同。统计了2928个细胞的Ag-NORｓ数目，每细胞平均Ag-NORｓ数为5.377±0.279，变化范围3～10个。认为岭南牛是我国北方普通牛与南方肩峰牛两大牛群汇合交汇点的南部边缘之一。 |
| 关键词: Y染色体，多态性，Ag－NOR＿s，岭南牛 |
| DOI： |
| 分类号:S823.2 |
| 基金项目: |
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| On Chromosome of Lingnan Cattle |
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Chen Hong Qiu Huan He Fuhai
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| Abstract: |
| The six bulls and five cows were used for studying the karyotype,G-hand,C-band and Ag-NORｓof Lingnan Cattle.It was found that Y chromosome palymorphism existed among individuals within the breed.Y chromosomes of the breed included two types: metacentric and acrocentric chromosomes.G- and C-bands on metacentric Y chromosome of the breed were the same as those in Bos taurus. on the other hand,G- and C-bands on acrocentric Y chromosome of the breed were the same as those in Bos indicus.With the study of 2928 cells,it was found that Ag-NORｓ number per cell was 5.377士0.279 ranging from 3 to 10. |
| Key words: Y chromosome,palymorphism,Ag-NORｓ,Lingnan Cattle |
