[目的]探究云上黑山羊主配公羊的亲缘关系及近交系数,构建肉羊高效联合育种体系,提升云上黑山羊生产性能和可持续发展力。[方法]采用简化基因组测序(genotyping-by-sequencing,GBS)技术对云上黑山羊5个核心育种场(XD、ZY、ML、SB、TJ)的...[目的]探究云上黑山羊主配公羊的亲缘关系及近交系数,构建肉羊高效联合育种体系,提升云上黑山羊生产性能和可持续发展力。[方法]采用简化基因组测序(genotyping-by-sequencing,GBS)技术对云上黑山羊5个核心育种场(XD、ZY、ML、SB、TJ)的100只主配公羊进行测序,并使用BWA、SAMTOOLS、PLINK v 1.90、Gmatrix v 2、Mega X等软件进行质控后高质量单核苷酸多态性(single nucleotide polymorphism,SNP)位点鉴定、主成分分析(PCA)、状态同源距离矩阵(identical by state,IBS)和G矩阵构建、群体进化树分析、亲缘系数计算及近交系数估计。[结果]GBS质控后共获得215926个高质量SNPs位点;共检测到8692条连续性纯合片段(runs of homozygosity,ROH),长度在10.59~591.23 Mb之间,平均长度245.74 Mb。云上黑山羊主配公羊群体平均IBS遗传距离为0.118±0.011,亲缘关系G矩阵结果与IBS距离矩阵结果一致。结合群体进化树和亲缘关系分析,100只云上黑山羊被分为三大支和28个家系,其中家系2、11、13、14、16、17、18、20、23、24、25仅有1只公羊,XD、ZY、ML、SB、TJ核心育种场分别有18、10、8、5和8个家系;基于ROH的群体平均基因组近交系数为0.099641,29只公羊的近交系数<0.0625,39只公羊的近交系数在0.0625~0.125之间,32只公羊近交系数>0.125,存在较大的近交累积。[结论]100只云上黑山羊主配公羊被分为28个家系,其中11个家系仅有1只公羊,应加强繁育防止其血统的流失,配种方案制定中应关注近交系数>0.125的个体,防止近交衰退,同时根据不同的育种目标合理进行种公羊的交换。展开更多
采用基因分型测序(GBS)技术对堇叶紫金牛[Ardisia violacea(T.Suzuki)W.Z.Fang et K.Yao]13个野生居群77份样本进行单核苷酸多态性(SNP)位点挖掘,在此基础上,对13个居群77份样本的遗传多样性、系统发育树、亲缘关系等进行分析。结果表明...采用基因分型测序(GBS)技术对堇叶紫金牛[Ardisia violacea(T.Suzuki)W.Z.Fang et K.Yao]13个野生居群77份样本进行单核苷酸多态性(SNP)位点挖掘,在此基础上,对13个居群77份样本的遗传多样性、系统发育树、亲缘关系等进行分析。结果表明:共获得有效SNP位点246307个,每份样本检测到SNP位点1154~3789个。13个居群的观测杂合度为0.1569~0.4289,多态信息含量为0.0785~0.3244,核苷酸多样性指数为0.0002~0.0007,Tajima’s D值为0.2247~1.0936,Shannon’s多样性指数为0.2175~0.6649,表明堇叶紫金牛整体遗传多样性水平偏低。系统发育树、主成分分析和遗传结构分析结果显示77份样本可划分为6组。亲缘关系分析结果显示:居群内个体间的亲缘关系整体较近;居群间的亲缘关系与地理距离有一定的相关性。遗传分化和基因流分析结果显示:大部分居群间存在较高的遗传分化,各居群间存在一定程度的基因交流。综上所述,堇叶紫金牛13个居群的整体遗传多样性偏低,但居群间的遗传分化程度较高,这与居群间的地理距离较远、基因交流较少有关。建议优先保护安徽省黄山市祁门县牯牛降、浙江省舟山市定海区蔡家岙和浙江省宁波市象山县屠家园村3个遗传多样性较高的居群,并开展相关繁育工作以维持和扩大居群数量。展开更多
目的探讨实时荧光定量聚合酶链式反应(polymerase chain reaction,PCR)技术对检测妊娠晚期B族链球菌(group B streptococcus,GBS)感染的效果。方法选取2021年1—12月江苏省丹阳市妇幼保健院接收的180例妊娠晚期孕妇,均进行实时荧光定量...目的探讨实时荧光定量聚合酶链式反应(polymerase chain reaction,PCR)技术对检测妊娠晚期B族链球菌(group B streptococcus,GBS)感染的效果。方法选取2021年1—12月江苏省丹阳市妇幼保健院接收的180例妊娠晚期孕妇,均进行实时荧光定量PCR检测,以基因测序法为金标准,分析该技术对GBS感染的诊断效能,并根据金标准将患者分为阳性组、阴性组,比较两组不良结局情况。结果实时荧光定量PCR技术检查诊断孕晚期GBS感染的准确率为99.44%、灵敏度为92.86%、特异度为100.00%,与金标准比较一致性较好(Kappa=0.96)。阳性组早产、胎膜早破、宫内感染、胎儿窘迫发生率分别为14.29%、14.29%、21.43%、21.43%,均高于阴性组,差异有统计学意义(χ^(2)=12.741、12.741、24.281、24.281,P<0.05)。阳性组新生儿感染、低体重儿发生率分别为14.29%、21.43%,均高于阴性组,差异有统计学意义(χ^(2)=12.741、24.281,P<0.05)。结论对妊娠晚期GBS感染采用实时荧光定量PCR技术检查诊断效能高,有利于预测不良妊娠结局,可指导临床诊疗工作的开展。展开更多
目的探析抗B族链球菌(group B Streptococcus,GBS)类抗生素联合利托君治疗对未足月胎膜早破患者宫缩抑制的影响。方法方便选取2016年5月—2021年5月福建省武夷山市中医院治疗的胎膜早破患者96例,采用电脑随机分组,将其分为参照组与治疗...目的探析抗B族链球菌(group B Streptococcus,GBS)类抗生素联合利托君治疗对未足月胎膜早破患者宫缩抑制的影响。方法方便选取2016年5月—2021年5月福建省武夷山市中医院治疗的胎膜早破患者96例,采用电脑随机分组,将其分为参照组与治疗组,各48例。参照组采取抗GBS类抗生素治疗,治疗组在参照组基础上进行利托君治疗,比较两组患者临床疗效、宫缩抑制时间和孕周延长时间、炎症指标、不良反应发生情况。结果治疗组总有效率为95.83%高于参照组的77.08%,差异有统计学意义(χ^(2)=7.207,P<0.05);治疗组宫缩抑制时间、延长孕周时间及产后出血量均优于参照组,差异有统计学意义(t=11.310、31.350、10.200,P<0.05);治疗后,治疗组NF-κBP65、TREM-1指标均低于参照组,差异有统计学意义(t=7.307、10.110,P<0.05);治疗组不良反应发生率为6.25%与参照组的10.41%比较,差异无统计学意义(P>0.05)。结论针对孕周在28~34+6周胎膜早破患者,采取抗GBS类抗生素联合利托君治疗,可以提高其疗效,改善患者的宫缩抑制时间和孕周延长时间,使其炎症指标下降,且安全性较高。展开更多
Group B streptococcus(GBS)is a Gram-positive,encapsulated bacterium that belongs to the group of pyogenic streptococci,and it is an asymptomatic colonizer of the digestive and genitourinary tracts of healthy human adu...Group B streptococcus(GBS)is a Gram-positive,encapsulated bacterium that belongs to the group of pyogenic streptococci,and it is an asymptomatic colonizer of the digestive and genitourinary tracts of healthy human adults.However,it can cause severe invasive infections in neonates and immunocompromised adults.In the 1960s,GBS was identified as a leading cause of life-threatening neonatal infections[1,2].展开更多
Introduction: GBS is a rare condition in children. The risk factors for GBS are present in Africa;however, the majority of studies reported are case series. The objective of our work was to evaluate the epidemiologica...Introduction: GBS is a rare condition in children. The risk factors for GBS are present in Africa;however, the majority of studies reported are case series. The objective of our work was to evaluate the epidemiological, clinical, paraclinical, therapeutic and evolutionary profile of GBS cases. Material and Method: This was a prospective longitudinal study, lasting 24 months between November 2019 and November 2021. All patients aged 2 - 18 years diagnosed with GBS according to the Brighton criteria (level 2) were included in our study. Patients with incomplete or unexploitable records were excluded. Results: Over a 24-month period, 16 cases of GBS were collected. These included 12 boys (75%) and 4 girls (25%). The demyelinating form (ADIP) was found in 9 children (43.75%) and the axonal form in 7 patients (37.5%), 5 of whom had pure motor involvement (AMAN) and 2 with sensory-motor involvement (AMSAN). Corticosteroid therapy was more effective in treating pain and in demyelinating forms. Three deaths were noted and all had AMAN. Conclusion: GBS poses a management problem in our context of a country with limited resources. Corticosteroid therapy has been shown to be effective in the treatment of pain and demyelinating forms of the disease and should be considered for use in GBS.展开更多
文摘[目的]探究云上黑山羊主配公羊的亲缘关系及近交系数,构建肉羊高效联合育种体系,提升云上黑山羊生产性能和可持续发展力。[方法]采用简化基因组测序(genotyping-by-sequencing,GBS)技术对云上黑山羊5个核心育种场(XD、ZY、ML、SB、TJ)的100只主配公羊进行测序,并使用BWA、SAMTOOLS、PLINK v 1.90、Gmatrix v 2、Mega X等软件进行质控后高质量单核苷酸多态性(single nucleotide polymorphism,SNP)位点鉴定、主成分分析(PCA)、状态同源距离矩阵(identical by state,IBS)和G矩阵构建、群体进化树分析、亲缘系数计算及近交系数估计。[结果]GBS质控后共获得215926个高质量SNPs位点;共检测到8692条连续性纯合片段(runs of homozygosity,ROH),长度在10.59~591.23 Mb之间,平均长度245.74 Mb。云上黑山羊主配公羊群体平均IBS遗传距离为0.118±0.011,亲缘关系G矩阵结果与IBS距离矩阵结果一致。结合群体进化树和亲缘关系分析,100只云上黑山羊被分为三大支和28个家系,其中家系2、11、13、14、16、17、18、20、23、24、25仅有1只公羊,XD、ZY、ML、SB、TJ核心育种场分别有18、10、8、5和8个家系;基于ROH的群体平均基因组近交系数为0.099641,29只公羊的近交系数<0.0625,39只公羊的近交系数在0.0625~0.125之间,32只公羊近交系数>0.125,存在较大的近交累积。[结论]100只云上黑山羊主配公羊被分为28个家系,其中11个家系仅有1只公羊,应加强繁育防止其血统的流失,配种方案制定中应关注近交系数>0.125的个体,防止近交衰退,同时根据不同的育种目标合理进行种公羊的交换。
文摘采用基因分型测序(GBS)技术对堇叶紫金牛[Ardisia violacea(T.Suzuki)W.Z.Fang et K.Yao]13个野生居群77份样本进行单核苷酸多态性(SNP)位点挖掘,在此基础上,对13个居群77份样本的遗传多样性、系统发育树、亲缘关系等进行分析。结果表明:共获得有效SNP位点246307个,每份样本检测到SNP位点1154~3789个。13个居群的观测杂合度为0.1569~0.4289,多态信息含量为0.0785~0.3244,核苷酸多样性指数为0.0002~0.0007,Tajima’s D值为0.2247~1.0936,Shannon’s多样性指数为0.2175~0.6649,表明堇叶紫金牛整体遗传多样性水平偏低。系统发育树、主成分分析和遗传结构分析结果显示77份样本可划分为6组。亲缘关系分析结果显示:居群内个体间的亲缘关系整体较近;居群间的亲缘关系与地理距离有一定的相关性。遗传分化和基因流分析结果显示:大部分居群间存在较高的遗传分化,各居群间存在一定程度的基因交流。综上所述,堇叶紫金牛13个居群的整体遗传多样性偏低,但居群间的遗传分化程度较高,这与居群间的地理距离较远、基因交流较少有关。建议优先保护安徽省黄山市祁门县牯牛降、浙江省舟山市定海区蔡家岙和浙江省宁波市象山县屠家园村3个遗传多样性较高的居群,并开展相关繁育工作以维持和扩大居群数量。
文摘目的探讨实时荧光定量聚合酶链式反应(polymerase chain reaction,PCR)技术对检测妊娠晚期B族链球菌(group B streptococcus,GBS)感染的效果。方法选取2021年1—12月江苏省丹阳市妇幼保健院接收的180例妊娠晚期孕妇,均进行实时荧光定量PCR检测,以基因测序法为金标准,分析该技术对GBS感染的诊断效能,并根据金标准将患者分为阳性组、阴性组,比较两组不良结局情况。结果实时荧光定量PCR技术检查诊断孕晚期GBS感染的准确率为99.44%、灵敏度为92.86%、特异度为100.00%,与金标准比较一致性较好(Kappa=0.96)。阳性组早产、胎膜早破、宫内感染、胎儿窘迫发生率分别为14.29%、14.29%、21.43%、21.43%,均高于阴性组,差异有统计学意义(χ^(2)=12.741、12.741、24.281、24.281,P<0.05)。阳性组新生儿感染、低体重儿发生率分别为14.29%、21.43%,均高于阴性组,差异有统计学意义(χ^(2)=12.741、24.281,P<0.05)。结论对妊娠晚期GBS感染采用实时荧光定量PCR技术检查诊断效能高,有利于预测不良妊娠结局,可指导临床诊疗工作的开展。
文摘目的探析抗B族链球菌(group B Streptococcus,GBS)类抗生素联合利托君治疗对未足月胎膜早破患者宫缩抑制的影响。方法方便选取2016年5月—2021年5月福建省武夷山市中医院治疗的胎膜早破患者96例,采用电脑随机分组,将其分为参照组与治疗组,各48例。参照组采取抗GBS类抗生素治疗,治疗组在参照组基础上进行利托君治疗,比较两组患者临床疗效、宫缩抑制时间和孕周延长时间、炎症指标、不良反应发生情况。结果治疗组总有效率为95.83%高于参照组的77.08%,差异有统计学意义(χ^(2)=7.207,P<0.05);治疗组宫缩抑制时间、延长孕周时间及产后出血量均优于参照组,差异有统计学意义(t=11.310、31.350、10.200,P<0.05);治疗后,治疗组NF-κBP65、TREM-1指标均低于参照组,差异有统计学意义(t=7.307、10.110,P<0.05);治疗组不良反应发生率为6.25%与参照组的10.41%比较,差异无统计学意义(P>0.05)。结论针对孕周在28~34+6周胎膜早破患者,采取抗GBS类抗生素联合利托君治疗,可以提高其疗效,改善患者的宫缩抑制时间和孕周延长时间,使其炎症指标下降,且安全性较高。
基金support provided by Engineering Research Center of Clinical Functional Materials and Diagnosis&Treatment Devices of Zhejiang Province[WIUCASK20002]Wenzhou Institute of UCAS[WIUCASQD2020009 and WIUCASICTP2022]Oujiang Laboratory(Zhejiang Lab for Regenerative Medicine,Vision and Brain Health)[OJQDJQ2022001].
文摘Group B streptococcus(GBS)is a Gram-positive,encapsulated bacterium that belongs to the group of pyogenic streptococci,and it is an asymptomatic colonizer of the digestive and genitourinary tracts of healthy human adults.However,it can cause severe invasive infections in neonates and immunocompromised adults.In the 1960s,GBS was identified as a leading cause of life-threatening neonatal infections[1,2].
文摘Introduction: GBS is a rare condition in children. The risk factors for GBS are present in Africa;however, the majority of studies reported are case series. The objective of our work was to evaluate the epidemiological, clinical, paraclinical, therapeutic and evolutionary profile of GBS cases. Material and Method: This was a prospective longitudinal study, lasting 24 months between November 2019 and November 2021. All patients aged 2 - 18 years diagnosed with GBS according to the Brighton criteria (level 2) were included in our study. Patients with incomplete or unexploitable records were excluded. Results: Over a 24-month period, 16 cases of GBS were collected. These included 12 boys (75%) and 4 girls (25%). The demyelinating form (ADIP) was found in 9 children (43.75%) and the axonal form in 7 patients (37.5%), 5 of whom had pure motor involvement (AMAN) and 2 with sensory-motor involvement (AMSAN). Corticosteroid therapy was more effective in treating pain and in demyelinating forms. Three deaths were noted and all had AMAN. Conclusion: GBS poses a management problem in our context of a country with limited resources. Corticosteroid therapy has been shown to be effective in the treatment of pain and demyelinating forms of the disease and should be considered for use in GBS.
