Sex,age, or genetic differences related to play behaviors in Japanese Black calves

Play behavior in young animals has been used to evaluate the condition (health) of livestock. We investigated age, sex, and genetic differences of Japanese Black calves in relation to frequency of play behaviors (galloping, leaping, turning, bucking, head butting objects, and head shaking) and examined how these relationships might affect growth during the suckling stage. Locomotor play behaviors (galloping, leaping, turning, and bucking) and head butting objects gradually declined with the age for both sexes. The frequency of head butting was significantly higher in males than females. We found that significant interaction effects (age × MAOA polymorphism) in play behaviors (except head shaking) and the frequencies of locomotor play in calves without the wild‐type allele were significantly higher than those in younger calves (2 and 6 weeks of age). Weight gain was significantly correlated with the frequency of locomotor play in females, but not in males. This study suggests that play in Japanese Black calves gradually declines as they mature and that play may be controlled by variations in the MAOA gene. In addition, the frequency of locomotor play may be an indicator of health in female calves.     

马MxA基因第13外显子的多态性研究

[目的]研究4个品种马MxA基因第13外显子的多态性。[方法]根据GenBank中已公布的MxA基因序列设计引物,利用PCR技术从三河马、锡尼河马、乌审马和巴尔虎马血液基因组DNA中扩增MxA第13外显子基因片段,利用PCR-SSCP方法检测该基因片段多态性并进行测序。[结果]只有乌审马MxA基因第13外显子存在多态性,第2 018位点发生了突变,鸟嘌呤（G）→腺嘌呤（A）,由此导致氨基酸发生改变,由谷氨酸（G lu）→丙氨酸（A la）。[结论]该研究为探讨马MxA蛋白基因抗病毒作用奠定了基础。     

马铃薯机械化旱作垄植技术初探——以固阳县为例

内蒙古自治区政府将马铃薯产业列入现代农业产业技术体系。通过以内蒙古包头市固阳县马铃薯实际种植情况及推广农机农艺集成技术为主,创立了一种旱地马铃薯机械化生产的新模式——单垄单行覆膜种植;并通过效益分析及观察研究,发现了该新模式中存在的问题及其解决方法。因此,马铃薯机械化旱作垄植技术是一项在没有灌溉条件下,充分利用自然降水,提高土地生产能力,实现旱作马铃薯高产稳产的栽培技术,本技术适用于阴山以北的半干旱地区。     

东乌珠穆沁旗天然草地地上生物量与物种数的空间变化

为给东乌珠穆沁旗草地环境保护和草地畜牧业可持续发展提供数据支持和理论支撑,以东乌珠穆沁旗2020年调查数据为基础,采用地统计及拟合函数等研究方法,对东乌珠穆沁旗天然草地地上生物量与物种数的空间变化特点及相互关系进行了研究.结果表明,东乌珠穆沁旗草地物种数单位均值上的变异程度高于地上生物量,但空间异质性地上生物量略高于物...     

克氏针茅草原种群特征对放牧强度的响应

于2010年和2011年在内蒙古锡林郭勒盟正镶白旗额力图牧场克氏针茅草原实施控制性放牧试验,采用对比分析的方法测定了主要植物种群特征在不同放牧强度下的变化。结果表明:随着放牧强度增加,群落的优势种克氏针茅、羊草等优良牧草的多度在中度放牧区出现最高值,重要值、高度、盖度均明显降低并逐渐被冷蒿、糙隐子草等耐牧性牧草所取代,草地初级生产力下降。     

马MxA基因第13外显子的多态性研究(英文)

[Objective] To investigate the polymorphism of the thirteenth exon of MxA gene in 4 species of horse. [Method] The thirteenth exon of MxA gene fragments were amplified from genomic DNA of Sanhe horse, Xinihe horse, Wushen horse and Baerhu horse with the primers designed according to the MxA sequence announced in GenBank; the polymorphism of MxA gene was detected by PCR-SSCP and the products were sequenced. [Result] The polymorphism of the thirteenth exon of MxA gene appeared only in Wushen horse, the 2 081 nt of which mutated from guanine (G) to adenine (A) and the corresponding amino acid of which changed from glutamate (Glu) to alanine (Ala). [Conclusion] The study provided a basis for exploring the antiviral effect of MxA protein.     

内蒙古东乌珠穆沁旗草地植物群落营养成分分析

[目的]明确内蒙古自治区东乌珠穆沁旗草地植物群落营养成分现状,促进草地畜牧业可持续发展和草地生态环境改善.[方法]该研究以东乌珠穆沁旗10个乡镇(苏木)的草地植物群落为研究对象,分析其营养成分含量,结合对应分析方法,阐释不同乡镇(苏木)草地植物群落营养成分含量差异及特点.[结果]各乡镇(苏木)中乌里雅斯太镇在公因子分析...