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首页> 外文期刊>Tropical Animal Health and Production >Divergent development of testosterone secretion in male zebu (Bos indicus) and crossbred cattle (Bos indicus x Bos taurus) and buffaloes (Bubalus bubalis) during growth
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Divergent development of testosterone secretion in male zebu (Bos indicus) and crossbred cattle (Bos indicus x Bos taurus) and buffaloes (Bubalus bubalis) during growth

机译：生长过程中雄性斑马（Bos indicus）和杂交牛（Bos indicus x Bos taurus）和水牛（Bubalus bubalis）睾丸激素分泌的不同发展

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Delayed pubertal development and low fertility of Bos indicus x Bos taurus crossbred male cattle and domestic buffaloes is hardly understood hence, a sensitive enzymeimmunoassay (EIA) was developed using the second antibody-coating technique and testosterone-3-O-carboxymethyloxime-horseradish peroxidase conjugate as a label for determination of testosterone in blood plasma. The EIA was validated by standard criteria. Blood samples were collected by venipuncture from growing male cattle (Karan Fries and Sahiwal) and buffalo (Murrah) and testosterone was estimated using the EIA procedure. Plasma testosterone concentrations increased significantly (P<0.05) with advancing age. Testosterone concentrations were significantly (P<0.01) higher in Sahiwal males in comparison to Karan Fries males. The low testosterone levels in crossbred than Sahiwal could imply that crossbred males have either not stabilized genetically or not adapted well in Indian climatic conditions resulting in poor libido and poor semen quality. The low testosterone levels in Murrah buffalo males may be the possible reason for delayed maturity in this species. The direct, sensitive EIA validated for estimating the plasma testosterone concentration was reliable for studying the testosterone profile in blood plasma of males. The results suggest that there could be a requirement for higher testosterone secretion by males during early stages of growth for attaining early sexual maturity.
机译：人们几乎不了解Bos indicus x Bos taurus杂交公牛和家养水牛的青春期发育延迟和低生育力，因此，使用第二抗体包被技术和睾丸激素-3-O-羧甲基肟-辣根过氧化物酶偶联物开发了一种敏感的酶免疫分析法（EIA）。作为测定血浆中睾丸激素的标签。 EIA已通过标准标准进行了验证。通过静脉穿刺从生长中的公牛（Karan Fries和Sahiwal）和水牛（Murrah）中采集血样，并使用EIA程序估算睾丸激素。随着年龄的增长，血浆睾丸激素浓度显着增加（P <0.05）。与Karan Fries雄性相比，Sahiwal雄性中的睾丸激素浓度显着更高（P <0.01）。杂种中的睾丸激素水平低于Sahiwal，这可能意味着杂种雄性在遗传上没有稳定，或者在印度气候条件下不能很好地适应，导致性欲低下和精液质量差。 Murrah水牛雄性中的睾丸激素水平低可能是该物种延迟成熟的可能原因。经验证可直接估算血浆睾丸激素浓度的直接，敏感的EIA，对于研究男性血浆中的睾丸激素谱是可靠的。结果表明，为了达到早期的性成熟，可能需要男性在生长的早期阶段分泌更高的睾丸激素。

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