贵州省瓮安县猪附红细胞体病的诊断

附红细胞体病(Eperythrozoonosis)是一种可通过吸血昆虫等媒介传播,通过摄食含有该病原的血液(添食伤口)或被该病原污染的物质(饲料、饮水、粪、尿等)直接传播,通过被污染的各种器械(针头、剪刀等)间接传播,通过交配传播及胎盘垂直传播等高度传染性人畜共患病,又称红皮病、黄疸性贫血、类边虫病。关于病原的分类争议很多,1932年Doyle在印度首次报道,     

Cloning and Sequence Analysis of Major Histocompatibility Complex Ⅰ Gene from Goose F1 of Fast-growth Lines

According to the multiple alignments identified major histocompatibility complex Ⅰ (MHC Ⅰ) gene conserved sequence registered in GenBank from the family ducks (Anatidae) anser waterfowl, a pairs of specific primers for the fragments of MHCⅠgene of goose F1 from fast-growth lines were designed and synthesized by Primer Premier 5.0. Using the genome DNA of goose F1 from fast-growth lines, the target gene fragment was obtained by PCR. To conduct sequencing of the fragments of MHCⅠgene of goose F1 from fast-growth lines and make sequence alignment and analysis of protein structure and function by bioinformatics, and research the characteristics of MHCⅠgene of goose F1 and the physicochemical properties of the protein. Bioinformatics was analyzed the nucleic acid data, deduced amino acid sequence and phylogenetic trees. The result of sequence analysis showed that the fragments of MHCⅠgene of goose F1 from fast-growth lines was 1036 bp in length, which coded 96 amino acids polyprotein. The homology were 93% and 83% with MHC Ⅰ gene and coding sequence of Wulong goose in NCBI respectively. There were 72 different bases sequence and 16 amino acids change. There also was higher homology with other poultry, and existed genetic relationship of Siji goose > chickens > ducks.The homology segment sequences corresponding to the fragments of MHCⅠ gene of goose F1 coded 96 amino acids protein, which molecular weight, PI, positively or negatively charged amino acid, estimated half-life, instability index, aliphatic index and average hydrophobicity were 11.342 ku, 5.32, 14, 17, 2.8 h, 34.92, 42.81, -1.066, respectively, and appeared 9 B cell epitopes, but contained no signal peptide. These results indicated that the protein for hydrophilic non-secreted proteins, had the high immunogenicity. In addition, The protein structure study indicated that alpha-helix, beta-sheet, beta-turn and random coil were 31.25%,16.67%, 14.58% and 37.50%, respectively. There existed amino terminal domain and carboxyl terminal domain in the tertiary structure. Therefore, MHC gene had significant difference between species and populations of individuals by the pathogen pressure in environment, and there were the interaction between polymorphism of MHC molecules and the diversity of antigenic peptide. MHC determined the differences of individual susceptibility to disease, and could be treated as a candidate gene for disease resistance.     

赛鸽界的传奇人物——卡瑞尔·慕利门(连载四)

提起比利时阿连栋克的卡瑞尔·慕利门,相信广大鸽友无人不知,无人不晓。为了使广大鸽友更全面、更深层次地了解卡瑞尔·慕利门和他的鸽系,作者法兰克·戴勒曼斯特别撰写了此书。     

试析配套系与猪配套系育种

“配套系”（complete set line）一词是我国学者从实用与易于理解的角度提出的，与英文文献中普遍使用的“hybrids”同义。“猪配套系”则相应地与“hybrid pigs（hybrid swine）”同义。     

美系白獭兔的饲料配方

美系白獭兔具有优良的生产性能指标,适应北方冬季室内10-15℃的温度下产仔成活,体型普遍达到4．0千克。母兔乳头4对或4对以上,胎均产仔7．8只,年均成活出栏30只以上。5．0月龄至5．5月龄体重达2．5-3．0千克。皮毛达到平齐,毛密每平方厘米达1．6-2．0万根,3千克活重屠宰率（去头净膛）达52％以上。     

认准市场,坚持特色,天水花牛苹果终“长大”

在全国各大产区都在大力发展富士系苹果之时,甘肃省天水市多年坚持发展以元帅系为主的特色苹果产业,目前已成为全国规模最大的元帅系苹果栽培基地;成功打造的花牛品牌已成为我国应用时间最长、影响力最大的苹果品牌;所产元帅系苹果因特有品质受到了以老人和小孩为主的广大消费者喜爱,通过差异化、特色化发展,走出了一条产业发展的阳光大道。     

西宁市市郊鸡新城疫防治效果调查

西宁市市郊鸡新城疫防治工作在各级政府的重视和上级业务主管部门的支持下,认真贯彻《中华人民共和国动物防疫法》等法律法规,坚持＂预防为主＂的方针,开展以免疫为重点的防治工作,通过采取春季雏鸡用新城疫Ⅱ系苗滴鼻和秋季以鸡新城疫Ⅰ系苗免疫注射,随时补针的免疫程序,层层签订畜禽防疫目标责任书,全面落实各项防治措施,完善防疫档案管理制度,经过各级业务人员多年的努力,     

蛋用鹌鹑黄羽Ⅱ系选育研究

为掌握蛋用鹌鹑黄羽II系的选育进展,本研究以湖北省农业科学院与湖北神丹公司共同选育的黄羽Ⅱ系蛋用鹌鹑为试验动物,采用全同胞家系法选育了4个世代,并记录了每个世代鹌鹑的开产日龄、开产体重、产蛋数、蛋重等产蛋相关性状。结果表明:在观测群中,开产日龄为45.36 d,比零世代提前了2.31 d;平均开产体重为112.24 g,降低了6.23%;平均蛋重每枚达10.24 g;20周龄产蛋数达到81.73枚,比零世代提高了6.46枚/只;开产至20周龄平均产蛋率达到90%。繁殖20周龄产蛋数达到89.82枚,35周龄产蛋数达到184.33枚;蛋品质稳定在2.3~2.5。由上述结果可以看出,蛋用鹌鹑黄羽II系的选育进展较大,基本达到选育目的,且各性状性能指标能稳定遗传,该品系可用于进一步的配套系生产。     

冷季藏系羊补饲的效果观察

通过对20头2岁母藏系羊补饲,在补饲期间期中增重3.32kg,增重率为14.46%。期末增重0.91kg,增重率为3.81%。试验组羊总增重4.23kg,增重率为17.20%。对照组羊在期中增重-0.69 kg,增重率为-3.51%。对照组羊总增重-3.36kg,总增重率为-19.83%。补饲结束后在6月份增重2.65kg,增重率为9.99%。7月份增重8.03kg,增重率为23.24%。8月份增重5.18kg,增重率为13.04%。9月份增重8.73kg,增重率为17.42%。夏秋总增重21.59kg,增重率为44.88%。对照组羊在6月份增重0.29kg,增重率为1.70%。7月份增重3.74kg,增重率为17.92%。8月份增重2.13kg,增重率为9.26%。9月份增重6.22kg,增重率为21.22%。对照组羊在夏秋草场总增重12.09kg,增重率为41.88%。     

我国猪的遗传育种现状及现代种猪场的发展策略

猪育种就是从遗传上来改良种猪和商品猪,形成新的品种（系）,主要包括纯种（系）的选育提高、新品种（系）的育成、杂种优势的利用等,从而提高养猪业的产量和质量。在过去的三十多年里,猪育种的主要目标是降低背膘厚,提高胴体瘦肉率,提高生长速度。