猪4、8和13染色体上肉质性状的QTL定位     

张敬虎  熊远著  左波  雷明刚  蒋思文  李凤娥  郑嵘  李家连  钱辉跃 《畜牧兽医学报》2007,38(10):1009-1014

214头猪(180头F2个体)组成的资源家系中,在猪的第4、8和13染色体上共选取23个微卫星标记,对11种肉质性状做了QTL定位,这些肉质性状包括:背最长肌肌内脂肪率(IMF)、背最长肌含水量(WM)、背最长肌系水力(WHC)、背最长肌失水率(DLR)、背最长肌pH(pH1)、股二头肌pH(pH2)、头半棘肌pH(pH3)、背最长肌肉色值(MCV1)、股二头肌色值(MCV2)、背最长肌大理石纹评分(MMS1)和股二头肌大理石纹评分(MMS2)。结果表明:检测到2个染色体极显著水平的QTL(P≤0.01),它们是定位在SSC13上55 cM处的IMF QTL,和定位在SSC4上10 cM处的WM QTL;4个染色体显著水平的QTL(P≤0.05),它们是2个MCV2 QTL(SSC8上110 cM处和SSC13上70 cM处)、1个MMS1 QTL(SSC8上185 cM处)和1个MMS2 QTL(SSC8上185 cM处)。上述QTL解释的表型变异从0.16%(SSC8上MCV2 QTL)到17.84%(SSC8上MMS2 QTL)。  相似文献   

2株益生菌对皖南黄鸡生产性能影响的研究   总被引：3，自引：0，他引：3  

陈凤芹  张伟力  骆先虎 《动物医学进展》2006,27(9):84-88

分别用0%,0.2%,0.4%,0.6%和0.8%水平的益生菌(由地衣芽孢杆菌和枯草芽孢杆菌2菌株组成)添加于基础日粮中。每组实验鸡分别饲喂1种日粮,饲喂6周。通过对皖南黄鸡生长性能和屠宰性能分析,研究益生菌对皖南黄鸡生产性能的影响,并对不同水平的益生菌组进行比较。0周龄~3周龄和第6周龄添加益生菌的各组鸡的平均体重和对照组差异不显著(P>0.05)。第4周龄和第5周龄末,0.4%和0.6%水平的益生菌组鸡的平均体重显著高于对照组(P<0.05),0.2%和0.8%水平的益生菌组与对照组差异不显著;各益生菌组间差异不显著。从整个饲养期来看,0.4%和0.6%水平益生菌组的平均日增重较高,平均日采食量较低,料重比较优;0.2%和0.8%水平益生菌组的平均日增重和料重比差于对照组。益生菌对皖南黄鸡的屠宰性能指标无显著影响。  相似文献   

用于鸡生长和肉质性状定位资源群体的构建   总被引：3，自引：0，他引：3  

罗成龙  张德祥  徐海平  彭志军  何丹林  曾华  聂庆华  梁少东  杨关福  张细权 《畜牧兽医学报》2006,37(11):1099-1106

采用远交F-2设计,以杏花鸡(A系)为亲本,分别与隐性白洛克鸡(B系)、泰和丝羽乌骨鸡(C系)进行全同胞和半同胞的正反交,产生了包含A♂×B♀、B♂×A♀、A♂×C♀、C♂×A♀4个杂交组合的各两组F2群体,并进行详细的性状表型记录,建立了可用于定位生长和肉质的数量性状座位(quantitative trait loci,QTL)的4个资源群体。对F2群体的各种性状表型值进行分析,结果显示,F2群体各生长性状和肉质性状都分离得很好。资源群体有足够的群体规模,并有利于校正母体效应和环境影响,保证有效单核苷酸多态性(single nucleotide poly-morphism,SNP)检测数量和QTL定位的准确性,使资源群体的构建达到了预期的效果。  相似文献   

鸡Camk2d基因外显子15的SNP发现、检测及与经济性状的关联分析     

朱志明  强巴央宗  陈国宏  李长春  朱猛进  樊斌  刘榜 《畜牧兽医学报》2006,37(12):1259-1263

克隆了鸡Camk2d基因的部分片段并发现Camk2d基因第15外显子51bp处有一C→T碱基转换的沉默突变,该突变位点具有VspI酶切多态,通过PCR-RFLP技术对我国乌骨鸡、鹿苑鸡、固始鸡、白耳鸡、仙居鸡、斗鸡和大骨鸡等7个不同地方品种鸡进行了基因型检测。结果表明:在7个品种中存在3种基因型(CC、CT、TT),χ2检验显示在各品种间基因型存在不同差异。同时在藏鸡,隐性白羽鸡,杂交鸡(藏♂×隐♀)和75%血液藏鸡[藏♂×(藏♂×隐♀)♀]群体中进行了基因-性状关联分析,结果表明,该SNP位点与腹脂存在极显著相关(P<0.01),与肌肉pH值显著相关(P<0.05)。  相似文献   

雷州黄牛体尺性状的主成分分析   总被引：7，自引：1，他引：6  

叶昌辉 《广西农业生物科学》2001,20(3):193-195

本文采用主成分分析的方法对雷州的黄牛的10个主要体尺性状指标进行统计分析，选择累计贡献率达93.089%的3个主成分进行分析，明确了雷州黄牛的体型特征，为今后雷州的选育工作提供参考。  相似文献   

大果优质中熟油桃新品种‘甜丰’     

马之胜  贾云云  孙淑芬  陈体先  柴菊花  孙玉柱 《园艺学报》2004,31(1):134-134

 (¹ 河北省农林科学院石家庄果树研究所, 石家庄050061 ; ² 河北省沧州市林业局, 沧州061001)  相似文献   

Comparison of Different Agar Diffusion Methods for the Detection of Antimicrobial Residues in Slaughter Animals     

Hannu Korkeala  Olli Sorvettula  Osmo Mki-Petys  Jorma Hirn 《Acta veterinaria Scandinavica》1982,23(3):407

The different agar diffusion methods were compared using antibiotic and sulphonamide-impregnated filter-paper discs and the kidneys of healthy and emergency-slaughtered pigs and cows after slaughter.No method used seemed to be sensitive to all antimicrobial drugs preimpregnated onto discs. Tetracycline yielded a greater zone of inhibition at pH 6 than at pH 8 and aminoglycosides, erythromycin, polymyxin B and lin cornycin at pH 8 than at pH 6. It therefore seems necessary to use different pHs (6 and 8). The addition of trimethoprim to the medium is necessary for the detection of sulphonamides. Bacillus subtilis BGA used as the test organism was more sensitive to sulphonamides on the “Test agar for the inhibitor test” containing trimethoprim than on the “Iso-Sensitest agar” also containing trimethoprim. The addition of trimethoprim to “Test agar for the inhibitor test” is recommended at pH 8 but not at pH 6 because false-positive cases (with inhibition zones > 2 mm) were observed at pH 6 with trimethoprim on the kidneys of healthy pigs.  相似文献   

Dominance variation across six herbicides of the Arabidopsis thaliana csr1-1 and csr1-2 resistance alleles     

Roux F  Matéjicek A  Gasquez J  Reboud X 《Pest management science》2005,61(11):1089-1095

Dominance of a resistance trait can be defined as a measure of the relative position of the phenotype of the heterozygote RS compared with the phenotype of the two corresponding homozygotes, SS and RR. This parameter has been shown to have primary importance in the dynamics of pesticide resistance evolution. Literature on insecticide resistance suggests that dominance levels in the presence of insecticide vary greatly from completely recessive to completely dominant. With insecticides, both the chemical applied and the dosages used have been demonstrated to affect the dominance. By contrast, almost all herbicide resistances have been found to be inherited as partially to totally dominant traits. This discrepancy between weeds and insects may partly result from the methodologies applied to measure the dominance, ie a single dose for herbicide versus several doses for insecticide. Using two well-known resistances (csr1-1 and csr1-2) to acetolactate synthase (ALS) inhibitors in Arabidopsis thaliana (L) Heynh (mouse-ear cress), we used several herbicide doses to determine the dominance level to six ALS-inhibiting herbicides. The dominance level in the presence of herbicide varied from completely dominant to completely recessive, depending on the resistance allele and the herbicide tested. The dominance of the csr1-1 and csr1-2 resistance alleles ranged from 0 (completely recessive) to 1.1 (dominant) and from 0 to 0.3 (partially dominant), respectively. The recessivity of some resistance alleles in the presence of herbicide could lead to the development of improved resistance management in order to delay or avoid herbicide resistance evolution, especially in the control of outcrossing weed species.  相似文献   

建设林区特色经济的设想     

王建林  杨军  王品思 《林业科技情报》2000,(4)

本文结合伊春林区开发建设几十年的实际状况,论述了原国有单一经济造成的弊端,并提出了发展多元化经济——建设林区特色经济的必要性及几项具体实施设想,对指导建设林区特色经济具有实用性。  相似文献   

卡巴多(Carbadox)对肉用幼兔生长发育的影响     

翟频  张振华  傅泽红 《中国养兔杂志》2000,(6):16-18

选用５０日龄新西兰白兔６８只,随机分为４组,其中１个为对照组,３个为试验组,试验组中分别添加０．０１‰、０．０２‰和０．０３‰的卡巴多,研究其对幼兔生长发育和饲料转化率的影响。结果表明：试Ⅰ组、试Ⅱ组、试Ⅲ组的全期日增重为２７．４８ｇ、２６．３８ｇ和２８．０６ｇ,比对照组２５．５０ｇ分别提高７．７６％、３．４５％和１０．０４％,差异显著（Ｐ〈０．０５）,各试验组间差异不显著（Ｐ〉０．０５）;３个试验的料重比分别比对照组低１４．３６％、１１．９２％和１５．９９％;以添加０．０３‰卡巴多的经济效益最好。  相似文献