The objective of this study was to investigate the effect of long-term grazing sheep in cotton stubble on variation of biochemistry components and free gossypol residual in the blood. The survey found that 15% ewe of ...The objective of this study was to investigate the effect of long-term grazing sheep in cotton stubble on variation of biochemistry components and free gossypol residual in the blood. The survey found that 15% ewe of grazing group suffered miscarriage or premature birth,compared with the captive group ewes without this phenomenon. Blood test result shows that the free gossypol concentration in serum of grazing group was significantly higher than in indoor captive feeding group( P < 0. 01). In order to ensure the health of sheep grazing on cotton stubble and improve breeding rate,there is a need to do further reasonable research of grazing and feeding methods.展开更多
本研究针对不同妊娠时期细毛羊进行胎儿性别鉴定工作。首先对外周血浆/血清分别采用加热法和酚-氯仿法提取游离DNA。通过普通PCR扩增雄性性别决定基因(sex determining region Y,SRY)和β-actin检测基因的目的片段。鉴于部分样品未扩增...本研究针对不同妊娠时期细毛羊进行胎儿性别鉴定工作。首先对外周血浆/血清分别采用加热法和酚-氯仿法提取游离DNA。通过普通PCR扩增雄性性别决定基因(sex determining region Y,SRY)和β-actin检测基因的目的片段。鉴于部分样品未扩增出SRY基因目的片段,设计2对内外引物,运用优化后的巢式PCR体系再次针对SRY目的基因展开特异性扩增。最后对每个妊娠时间段的鉴定结果和实际生产结果进行统计,计算准确率。结果表明:加热法和酚-氯仿法均成功分离提取出妊娠母羊外周血浆/血清中的游离DNA,并扩增出β-actin检测基因片段;SRY阳性样本扩增出了SRY目的基因片段和β-actin检测基因片段,SRY阴性样本只扩增出了β-actin检测基因片段;性别鉴定的平均准确率达到81.25%(19.5/24),SRY基因检出率与妊娠时间的长短呈正比。结论,本研究建立了一种基于外周血游离DNA检测细毛羊胎儿性别的非创伤性且高效低廉的产前诊断技术,但性别鉴定的准确率还有待提高。展开更多
基金Supported by National Natural Science Foundation of China(31360565)
文摘The objective of this study was to investigate the effect of long-term grazing sheep in cotton stubble on variation of biochemistry components and free gossypol residual in the blood. The survey found that 15% ewe of grazing group suffered miscarriage or premature birth,compared with the captive group ewes without this phenomenon. Blood test result shows that the free gossypol concentration in serum of grazing group was significantly higher than in indoor captive feeding group( P < 0. 01). In order to ensure the health of sheep grazing on cotton stubble and improve breeding rate,there is a need to do further reasonable research of grazing and feeding methods.
文摘本研究针对不同妊娠时期细毛羊进行胎儿性别鉴定工作。首先对外周血浆/血清分别采用加热法和酚-氯仿法提取游离DNA。通过普通PCR扩增雄性性别决定基因(sex determining region Y,SRY)和β-actin检测基因的目的片段。鉴于部分样品未扩增出SRY基因目的片段,设计2对内外引物,运用优化后的巢式PCR体系再次针对SRY目的基因展开特异性扩增。最后对每个妊娠时间段的鉴定结果和实际生产结果进行统计,计算准确率。结果表明:加热法和酚-氯仿法均成功分离提取出妊娠母羊外周血浆/血清中的游离DNA,并扩增出β-actin检测基因片段;SRY阳性样本扩增出了SRY目的基因片段和β-actin检测基因片段,SRY阴性样本只扩增出了β-actin检测基因片段;性别鉴定的平均准确率达到81.25%(19.5/24),SRY基因检出率与妊娠时间的长短呈正比。结论,本研究建立了一种基于外周血游离DNA检测细毛羊胎儿性别的非创伤性且高效低廉的产前诊断技术,但性别鉴定的准确率还有待提高。