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首页> 外文期刊>Research Opinions in Animal & Veterinary Sciences >Study on genetic gains and karyotype of Red Chittagong cattle in Bangladesh
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Study on genetic gains and karyotype of Red Chittagong cattle in Bangladesh

机译：孟加拉国红吉大港牛的遗传增益和核型研究

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摘要

The study was undertaken on the Red Chittagong Cow (RCC) community farms of five Upazilla (sub-district) at Chittagong area of Bangladesh from July 2010 to June 2011 to estimate the genetic progress of RCC, local and crossbred (Holstein × Local) cows and to study the karyotype of RCC. The genetic progress per generation of individual trait of the objective in the index for RCC, Local and Holstein × Local were estimated through deterministic approach and it was indicated that RCC showed higher gains than local cows. The rate of higher genetic gains for the individual trait indicated that these traits are responsible in effective selection programme for their improvement. For karyotyping of RCC, 100 blood samples from the RC cows were collected in heparinised vacutainers from jugular venupuncture. The blood samples were cultured using standard protocols and metaphase slides were prepared and observed under microscope. The diploid chromosome complement, 58+2 (XX or XY) was observed of RCC. On the basis of the position of the centromare acrocentric chromosome was highest (42%) than telocentic and metacentric chromosome and the telocentic chromosome was lowest (17%).
机译：该研究于2010年7月至2011年6月在孟加拉国吉大港地区的五个Upazilla（分区）的红色吉大港牛（RCC）社区农场进行，以估算RCC，本地和杂交（荷斯坦×本地）奶牛的遗传进展并研究RCC的核型。通过确定性方法估算了RCC，Local和Holstein×Local指标的目标个体性状每代的遗传进展，这表明RCC的收益要高于本地母牛。单个性状的较高遗传获得率表明，这些性状在有效的选择程序中负责其改良。对于RCC的核型分析，从颈静脉穿刺的肝素化真空容器中收集了100头来自RC奶牛的血液样本。使用标准方案培养血样，制备中期载玻片并在显微镜下观察。观察到RCC的二倍体染色体补体58 + 2（XX或XY）。根据中心点的位置，顶体染色体比端中心染色体和中间中心染色体最高（42％），而端中心染色体最低（17％）。

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