为研究影响肉鸡屠宰性状选育的主要遗传因素,试验采用全基因组关联分析(Genome-wide association study,GWAS)挖掘与屠宰性状相关的单核苷酸多态性(Single nucleotide polymorphism,SNP)位点和候选基因。以264只金陵花鸡终端父系公鸡为...为研究影响肉鸡屠宰性状选育的主要遗传因素,试验采用全基因组关联分析(Genome-wide association study,GWAS)挖掘与屠宰性状相关的单核苷酸多态性(Single nucleotide polymorphism,SNP)位点和候选基因。以264只金陵花鸡终端父系公鸡为试验材料,采集血液提取DNA,使用全基因组重测序技术获取个体基因型数据,使用PLINK 1.90软件对基因型数据进行质量控制。对宰前体重、屠体重、半净膛重、全净膛重4个性状进行屠宰测定,使用EXCEL和R语言进行正态分布检验和相关性分析。使用GEMMA软件进行GWAS分析,定位出显著的SNP位点。使用SPSS软件分析屠宰性状的有利基因型。结果显示:屠宰性状均符合正态分布,相关度在0.96以上。定位到4个显著的SNP位点,注释到一个基因为RAB6A。1和3号染色体显著位点TT为有利基因型,19号染色体上显著位点CC为有利基因型。研究提示:应根据挖掘到的显著SNPs和候选基因进行屠宰性状的选择,加强肉鸡屠宰性状分子育种的理论基础以提高屠宰加工型肉鸡的选择进展。展开更多
旨在揭示白羽肉鸡孵化性状的遗传基础。本试验以白羽肉鸡A、B两个公鸡群体为素材,测定A群体5个世代(556只)、B群体3个世代(398只)的40周龄种蛋受精率和孵化率,并利用55K SNP芯片对两个群体共954个健康个体进行基因分型。基于系谱和基因...旨在揭示白羽肉鸡孵化性状的遗传基础。本试验以白羽肉鸡A、B两个公鸡群体为素材,测定A群体5个世代(556只)、B群体3个世代(398只)的40周龄种蛋受精率和孵化率,并利用55K SNP芯片对两个群体共954个健康个体进行基因分型。基于系谱和基因型信息计算的A群体的受精率遗传力分别为0.21和0.14。利用混合线性模型对受精率和孵化率进行全基因组关联分析(genome-wide association study,GWAS)。全基因组关联分析共关联到12个显著SNPs,分布在1、9、11、12、20号染色体上,其中有9个SNPs与受精率显著关联,有3个SNPs与孵化率显著关联,对A群体受精率高、低组各4只公鸡睾丸组织进行转录组测序,实时荧光定量PCR验证两个差异表达基因。全基因组关联分析筛选出9个与受精率相关的候选基因COPG1、ADAMTS18、FABP2、CDH8、SLCO4A1、ATP13A3、NELL2、VEZT和IGHMBP2;3个与孵化率相关的候选基因TMEM、SCO1和MYH1A。转录组测序与荧光定量PCR验证了两个与受精率相关的候选基因HMGCLL1和COA6。本研究利用GWAS和转录组测序筛选到孵化性状的相关候选基因,为白羽肉鸡孵化性状的遗传改良提供了重要的分子标记。展开更多
The characteristics of deposition of chicken IMP and IMF were investigated in this experiment. Arbor Acres (AA) and Beijing Fatty Chickens (n=200, respectively) were raised under the same condition and were slaughtere...The characteristics of deposition of chicken IMP and IMF were investigated in this experiment. Arbor Acres (AA) and Beijing Fatty Chickens (n=200, respectively) were raised under the same condition and were slaughtered at 28 d, 56 d and 90 d to assay the content of IMP and IMF in breast and leg muscle. The results showed that the IMP content of Beijing Fatty Chicken was significantly higher than that of AA (P<0.01), and also significant difference existed between them in IMF (P<0.01). The IMP content in breast muscle was higher than that in leg muscle (P<0.01), while the IMF was inverse (P<0.01). IMP content of female was a little bit higher than that of male (P>0.05). IMF content varied with growth rate, and showed no association with sex. IMF content increased with age, while IMP did not.展开更多
文摘旨在揭示白羽肉鸡孵化性状的遗传基础。本试验以白羽肉鸡A、B两个公鸡群体为素材,测定A群体5个世代(556只)、B群体3个世代(398只)的40周龄种蛋受精率和孵化率,并利用55K SNP芯片对两个群体共954个健康个体进行基因分型。基于系谱和基因型信息计算的A群体的受精率遗传力分别为0.21和0.14。利用混合线性模型对受精率和孵化率进行全基因组关联分析(genome-wide association study,GWAS)。全基因组关联分析共关联到12个显著SNPs,分布在1、9、11、12、20号染色体上,其中有9个SNPs与受精率显著关联,有3个SNPs与孵化率显著关联,对A群体受精率高、低组各4只公鸡睾丸组织进行转录组测序,实时荧光定量PCR验证两个差异表达基因。全基因组关联分析筛选出9个与受精率相关的候选基因COPG1、ADAMTS18、FABP2、CDH8、SLCO4A1、ATP13A3、NELL2、VEZT和IGHMBP2;3个与孵化率相关的候选基因TMEM、SCO1和MYH1A。转录组测序与荧光定量PCR验证了两个与受精率相关的候选基因HMGCLL1和COA6。本研究利用GWAS和转录组测序筛选到孵化性状的相关候选基因,为白羽肉鸡孵化性状的遗传改良提供了重要的分子标记。
文摘The characteristics of deposition of chicken IMP and IMF were investigated in this experiment. Arbor Acres (AA) and Beijing Fatty Chickens (n=200, respectively) were raised under the same condition and were slaughtered at 28 d, 56 d and 90 d to assay the content of IMP and IMF in breast and leg muscle. The results showed that the IMP content of Beijing Fatty Chicken was significantly higher than that of AA (P<0.01), and also significant difference existed between them in IMF (P<0.01). The IMP content in breast muscle was higher than that in leg muscle (P<0.01), while the IMF was inverse (P<0.01). IMP content of female was a little bit higher than that of male (P>0.05). IMF content varied with growth rate, and showed no association with sex. IMF content increased with age, while IMP did not.
