Broken and cracked eggshells cause major economic losses to the egg production industry. An F2 population of 262 hens obtained by crossing a strong egg shell line with a weak egg shell line of the White Leghorn breed ...Broken and cracked eggshells cause major economic losses to the egg production industry. An F2 population of 262 hens obtained by crossing a strong egg shell line with a weak egg shell line of the White Leghorn breed was used for detecting the quantitative trait loci （QTL） affecting eggshell quality. The 2 lines were developed from the same founder population by two-way selection for egg shell strength with nondestructive deformation. Of the 1 014 microsatellite markers tested, 35 were mapped on 10 autosomal linkage groups. There was no informative marker on chromosome Z. The QTLs associated with 7 traits, i.e., body weight, short length of egg, long length of egg, eggshell strength, eggshell thickness （EST）, eggshell weight （ESW）, and egg weight （EW）, were identified. Highly significant （P〈0.01） QTLs associated with EST and ESW and a significant （P〈 0.05） QTL associated with EW were mapped to a region flanking ABR0545 and ABR0362 on chromosome 9. These QTLs are good candidates to be employed in the development of strategies for reducing the number of broken and cracked eggs in commercial layer houses by employing marker assisted selection.展开更多
提取南京地区经鉴定确诊为犬吉氏巴贝斯虫感染病犬血液中的DNA,设计引物采用PCR方法扩增犬吉氏巴贝斯虫HSP70基因,克隆至pET-32a质粒中,转化Rosetta-gami(DE3)pLyS大肠杆菌,利用IPTG诱导表达得到重组热休克蛋白(heat shock protein 70,H...提取南京地区经鉴定确诊为犬吉氏巴贝斯虫感染病犬血液中的DNA,设计引物采用PCR方法扩增犬吉氏巴贝斯虫HSP70基因,克隆至pET-32a质粒中,转化Rosetta-gami(DE3)pLyS大肠杆菌,利用IPTG诱导表达得到重组热休克蛋白(heat shock protein 70,HSP70)。用Ni柱纯化重组HSP70蛋白免疫BALB/c小鼠制备抗血清,并分析重组蛋白的免疫原性及反应原性。本研究成功构建了pET-32a-hsp70重组质粒,IPTG诱导后表达出可溶的重组HSP70蛋白。经过Western blot分析,表达的重组蛋白不但能够免疫小鼠产生抗体,还可以和天然犬吉氏巴贝斯虫抗血清发生特异性反应,为进一步建立犬巴贝斯虫免疫血清学诊断和疫苗抗原的开发奠定基础。展开更多
文摘Broken and cracked eggshells cause major economic losses to the egg production industry. An F2 population of 262 hens obtained by crossing a strong egg shell line with a weak egg shell line of the White Leghorn breed was used for detecting the quantitative trait loci （QTL） affecting eggshell quality. The 2 lines were developed from the same founder population by two-way selection for egg shell strength with nondestructive deformation. Of the 1 014 microsatellite markers tested, 35 were mapped on 10 autosomal linkage groups. There was no informative marker on chromosome Z. The QTLs associated with 7 traits, i.e., body weight, short length of egg, long length of egg, eggshell strength, eggshell thickness （EST）, eggshell weight （ESW）, and egg weight （EW）, were identified. Highly significant （P〈0.01） QTLs associated with EST and ESW and a significant （P〈 0.05） QTL associated with EW were mapped to a region flanking ABR0545 and ABR0362 on chromosome 9. These QTLs are good candidates to be employed in the development of strategies for reducing the number of broken and cracked eggs in commercial layer houses by employing marker assisted selection.
文摘提取南京地区经鉴定确诊为犬吉氏巴贝斯虫感染病犬血液中的DNA,设计引物采用PCR方法扩增犬吉氏巴贝斯虫HSP70基因,克隆至pET-32a质粒中,转化Rosetta-gami(DE3)pLyS大肠杆菌,利用IPTG诱导表达得到重组热休克蛋白(heat shock protein 70,HSP70)。用Ni柱纯化重组HSP70蛋白免疫BALB/c小鼠制备抗血清,并分析重组蛋白的免疫原性及反应原性。本研究成功构建了pET-32a-hsp70重组质粒,IPTG诱导后表达出可溶的重组HSP70蛋白。经过Western blot分析,表达的重组蛋白不但能够免疫小鼠产生抗体,还可以和天然犬吉氏巴贝斯虫抗血清发生特异性反应,为进一步建立犬巴贝斯虫免疫血清学诊断和疫苗抗原的开发奠定基础。
