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Association between PON1 Gene SNPs and Growth and Carcass Traits in Beef Cattle
Beef Cattle PON1 Gene SNPs Growth Traits Carcass Traits
2016/4/28
Paraoxonase-1 (PON1), like lipoprotein lipase (LPL), plays a key role in the metabolism and physiology of mammalian growth. The objectives of this study were to estimate the allele and genotype freque...
A New Single Nucleotide Polymorphism in the IGF-I Gene and Its Association with Growth Traits in the Nanjiang Huang Goat
Nanjiang Huang Goats Insulin-like Growth Factor I Polymorphism Growth Traits PCR-SSCP
2016/4/28
The objectives of this study were to identify polymorphisms of insulin-like growth factor I (IGF-I) gene and to investigate their association with growth traits in Nanjiang Huang goats. Five hundred a...
Multifactor Dimensionality Reduction (MDR) Analysis to Detect Single Nucleotide Polymorphisms Associated with a Carcass Trait in a Hanwoo Population
Multifactor-dimensionality Reduction (MDR) SNP Hanwoo Association Study
2016/4/27
Studies to detect genes responsible for economic traits in farm animals have been performed using parametric linear models. A non-parametric, model-free approach using the ??expanded multifactor-dimen...
棕熊肾脏的解剖学及光电镜观察
光电镜观察 解剖学 肾脏 棕熊
2008/4/23
本文观察了棕熊肾脏的大体解剖和光电镜下的组织结构。棕熊的肾脏为分叶肾,每个肾叶为多面锥体形。光镜下H—E染色切片标本可见肾实质有皮质和髓质两部分。皮质可见清晰的皮质迷路和髓放线结构。肾小体可分出血管极和尿极。血管球由毛细血管缠绕形成,外包有肾小囊。近曲小管管腔面可见刷状缘。在透射电镜下可见到瞎过屏障由有孔内皮.基膜及足细胞的次级突起构成。电镜下还可看到近曲小管游离面紧密排列的微绒毛和基底面的质膜内...
孵化期间鹌鹑蛋各成分的水分变化及胚胎生长
鹌鹑 孵化 水分变化 胚胎生长
2008/3/25
孵化期间鹌鹑蛋中黄和蛋白的含水量变化呈互补性,即蛋黄含水多时,蛋白含水量少,蛋黄含水少时,蛋白含水量多,但人孵前蛋黄含水同出壳时剩余蛋黄含水量无显著差异,孵化期间胚胎含水是逐渐减少的,第9日龄前胚胎生长缓慢,第9日龄后胚胎呈直线生长,湿重的生长模型为Y=0.0004X^3.59(r=0.99,P〈0.01),干重的生长模型为Y=0.00002X^4.1084(r=0.99,P〈0.01)。
大鲵早期胚胎发育观察
大鲵 发育 胚胎
2008/3/25
通过人工繁殖,我们先后获得4批大鲵幼苗。本文对大鲵早期胚胎发育过程进行了细致观察,确定了发育过程的时序,详细描述了外形特征,同时绘制出各发育时期的特征图。
东方铃蟾早期胚胎发育的初步观察
东方铃蟾 胚胎发育 观察
2008/3/25
本文大体采用shumway的分期方法,在18±l℃的实验室条件下,对采自连云港的东方铃蟾的早期肛胎发育进行了观察,结果表明:从受精卵期至鳃盖褶闭合期可分为24个时期,共历时235.11小时。本文对各时期的形态特征和持续时间进行了详细地描述和记录。
发头裸腹蚤卵和胚胎发育形态研究
发头裸腹蚤卵 胚胎发育
2008/3/25
在实验室恒温条件下,观察了发头裸腹蚤的卵和胚胎发育,结果表明,该种枝角类的卵是均有分裂的,并具有螺旋卵裂的特点。它的发育过程大致可分为4个阶段,其间可分若干小期。发头裸腹蚤卵和胚胎发育所需时间与温度的关系十分密切,在10、20、30℃时发育所需分别为150、47和23.5小时,对该种蚤的形态特点进行了讨论。