研究采用荧光定量PCR技术对Ca BP-D28k在蛋鸡生殖器官中的表达量进行分析,并利用SSCP技术寻找Ca BP-D28k的SNPs位点,继而与蛋品质性状进行关联分析。结果表明:1 Ca BP-D28k在各部位的表达情况为:输卵管子宫部>输卵管伞部>卵巢>...研究采用荧光定量PCR技术对Ca BP-D28k在蛋鸡生殖器官中的表达量进行分析,并利用SSCP技术寻找Ca BP-D28k的SNPs位点,继而与蛋品质性状进行关联分析。结果表明:1 Ca BP-D28k在各部位的表达情况为:输卵管子宫部>输卵管伞部>卵巢>输卵管膨大部>输卵管峡部。以卵巢为参照基准1,输卵管子宫部Ca BP-D28k表达量约为其73倍,差异极显著(P<0.01),输卵管峡部、膨大部与卵巢Ca BP-D28k表达量差异显著(P<0.05)。2 Ca BP-D28k第三外显子存在A5115G的突变位点,共检测到3种基因型(AA、AG和GG)。AG型蛋壳强度极显著高于AA和GG型(P<0.01),GG型哈氏单位与AA和AG型存在显著差异(P<0.05)。结果表明,Ca BP-D28k在蛋鸡生殖器官中有相对量的差异,并与蛋壳形成过程中钙离子的转运有密切联系;AG型为调控蛋壳强度和哈氏单位的优势基因型,研究结果为SNPs辅助选择育种提供了理论基础。展开更多
【目的】通过筛选与鹅蛋品质性状相关的分子标记和候选基因,为解析蛋品质性状的遗传机制及分子标记辅助选择提供理论支撑。【方法】采用同批次健康四川白鹅群体(209只)作为研究对象。收集了每只鹅在产蛋高峰期连续生产的5枚蛋,并测定了...【目的】通过筛选与鹅蛋品质性状相关的分子标记和候选基因,为解析蛋品质性状的遗传机制及分子标记辅助选择提供理论支撑。【方法】采用同批次健康四川白鹅群体(209只)作为研究对象。收集了每只鹅在产蛋高峰期连续生产的5枚蛋,并测定了蛋重、蛋形指数、蛋壳强度、蛋壳厚度、蛋壳重和蛋黄重量等6个蛋品质性状。基于前期209只四川白鹅(母鹅)2.896 Tb全基因组重测序数据(12.44×/个体),采用全基因组关联分析的方法,筛选与蛋品质性状相关的SNP位点和重要候选基因,并通过核酸飞行时间质谱方法检测了这些SNP位点的基因型频率。【结果】经过筛选过滤,共有9279339个SNPs和209个个体用于后续研究。GWAS研究发现,48个SNP位点与6个鹅蛋品质性状显著或建议性显著相关(阈值分别为5.43×10-9和1.09×10-7),并注释出27个蛋品质性状相关的候选基因,包括妊娠相关血浆蛋白A(pappalysin1,PAPPA)、蛋白丝氨酸/苏氨酸磷酸酶调节亚基2基因(serine/threonine-protein phosphatase 4 regulatory subunit 2,PP4R2)、乙醇胺磷酸转移酶1(ethanolamine phosphotransferase 1,EPT1)和离子型谷氨酸受体K2(glutamate receptor ionotropic,kainate 2,GRIK2)等,其中候选基因PAPPA参与蛋白质代谢,促进生长因子IGF生成,在PP4R2的11bp范围内存在5个SNPs与蛋壳厚度显著相关,另外在GRIK2上有6个SNPs与蛋黄重量显著相关,GRIK2和PP4R2分别与机体血钙维持功能以及胆固醇代谢相关。功能富集研究发现,候选基因主要参与了response to growth factor(GO:0070848)、intracellular chemical homeostasis(GO:0055082)、response to hormone(GO:0009725)和regulation of the monoatomic ion transport(GO:43269)等代谢通路。【结论】经GWAS方法筛选出PAPPA、GRIK2、ASCC3和EPT1分别作为蛋重、蛋黄重、蛋壳强度等蛋品质性状潜在功能基因,为鹅蛋品质性状的改良提供了分子遗传标记的理论参考。展开更多
The present study was conducted in each 20 eggs stored at 65 °F with 75% relative humidity, for a period of 5 weeks （T-I） 4 weeks （T-2）, 3 weeks （T-3）, 2 weeks （T-4） and 1 week （T-5） with broad end up. ...The present study was conducted in each 20 eggs stored at 65 °F with 75% relative humidity, for a period of 5 weeks （T-I） 4 weeks （T-2）, 3 weeks （T-3）, 2 weeks （T-4） and 1 week （T-5） with broad end up. The external qualities of eggs like egg weight, length, width and volume were measured. After recording the external qualities the eggs were broken on a glass plate for studying the internal qualities. Storage period had no statistically significant effect on egg weight （g）, egg volume （%）, shell thickness （mm）, shell weight （g） and shell percentage. Egg weight values determined in this present study was between 61.10 and 64.91 g. The egg volume （%）, egg shell thickness （mm）, shell weight （g） and shell percentage for different storage periods were 87.46 and 98.52, 0.28 and 0.34 5.29 and 5.98; and 8.16 and 9.44 respectively. Yolk weight （g）, yolk percentage and albumen percentage was significantly affected （P 〈 0.01） by storage period and the values ranging between 32.20 and 36.40, 48.59 and 58.53 and 32.01 and 43.24 respectively. Storage period had no statistically significant effects on egg shape index and specific gravity. The storage periods on yolk index, yolk colour, albumen index and Haugh unit were statistically significant （P 〈 0.01）. Yolk index value decreased significantly when storage period was lengthened. This study concluded that yolk index, yolk colour, albumen index, albumen percentage and Haugh unit were decreased with increase in storage time.展开更多
文摘研究采用荧光定量PCR技术对Ca BP-D28k在蛋鸡生殖器官中的表达量进行分析,并利用SSCP技术寻找Ca BP-D28k的SNPs位点,继而与蛋品质性状进行关联分析。结果表明:1 Ca BP-D28k在各部位的表达情况为:输卵管子宫部>输卵管伞部>卵巢>输卵管膨大部>输卵管峡部。以卵巢为参照基准1,输卵管子宫部Ca BP-D28k表达量约为其73倍,差异极显著(P<0.01),输卵管峡部、膨大部与卵巢Ca BP-D28k表达量差异显著(P<0.05)。2 Ca BP-D28k第三外显子存在A5115G的突变位点,共检测到3种基因型(AA、AG和GG)。AG型蛋壳强度极显著高于AA和GG型(P<0.01),GG型哈氏单位与AA和AG型存在显著差异(P<0.05)。结果表明,Ca BP-D28k在蛋鸡生殖器官中有相对量的差异,并与蛋壳形成过程中钙离子的转运有密切联系;AG型为调控蛋壳强度和哈氏单位的优势基因型,研究结果为SNPs辅助选择育种提供了理论基础。
文摘【目的】通过筛选与鹅蛋品质性状相关的分子标记和候选基因,为解析蛋品质性状的遗传机制及分子标记辅助选择提供理论支撑。【方法】采用同批次健康四川白鹅群体(209只)作为研究对象。收集了每只鹅在产蛋高峰期连续生产的5枚蛋,并测定了蛋重、蛋形指数、蛋壳强度、蛋壳厚度、蛋壳重和蛋黄重量等6个蛋品质性状。基于前期209只四川白鹅(母鹅)2.896 Tb全基因组重测序数据(12.44×/个体),采用全基因组关联分析的方法,筛选与蛋品质性状相关的SNP位点和重要候选基因,并通过核酸飞行时间质谱方法检测了这些SNP位点的基因型频率。【结果】经过筛选过滤,共有9279339个SNPs和209个个体用于后续研究。GWAS研究发现,48个SNP位点与6个鹅蛋品质性状显著或建议性显著相关(阈值分别为5.43×10-9和1.09×10-7),并注释出27个蛋品质性状相关的候选基因,包括妊娠相关血浆蛋白A(pappalysin1,PAPPA)、蛋白丝氨酸/苏氨酸磷酸酶调节亚基2基因(serine/threonine-protein phosphatase 4 regulatory subunit 2,PP4R2)、乙醇胺磷酸转移酶1(ethanolamine phosphotransferase 1,EPT1)和离子型谷氨酸受体K2(glutamate receptor ionotropic,kainate 2,GRIK2)等,其中候选基因PAPPA参与蛋白质代谢,促进生长因子IGF生成,在PP4R2的11bp范围内存在5个SNPs与蛋壳厚度显著相关,另外在GRIK2上有6个SNPs与蛋黄重量显著相关,GRIK2和PP4R2分别与机体血钙维持功能以及胆固醇代谢相关。功能富集研究发现,候选基因主要参与了response to growth factor(GO:0070848)、intracellular chemical homeostasis(GO:0055082)、response to hormone(GO:0009725)和regulation of the monoatomic ion transport(GO:43269)等代谢通路。【结论】经GWAS方法筛选出PAPPA、GRIK2、ASCC3和EPT1分别作为蛋重、蛋黄重、蛋壳强度等蛋品质性状潜在功能基因,为鹅蛋品质性状的改良提供了分子遗传标记的理论参考。
文摘The present study was conducted in each 20 eggs stored at 65 °F with 75% relative humidity, for a period of 5 weeks （T-I） 4 weeks （T-2）, 3 weeks （T-3）, 2 weeks （T-4） and 1 week （T-5） with broad end up. The external qualities of eggs like egg weight, length, width and volume were measured. After recording the external qualities the eggs were broken on a glass plate for studying the internal qualities. Storage period had no statistically significant effect on egg weight （g）, egg volume （%）, shell thickness （mm）, shell weight （g） and shell percentage. Egg weight values determined in this present study was between 61.10 and 64.91 g. The egg volume （%）, egg shell thickness （mm）, shell weight （g） and shell percentage for different storage periods were 87.46 and 98.52, 0.28 and 0.34 5.29 and 5.98; and 8.16 and 9.44 respectively. Yolk weight （g）, yolk percentage and albumen percentage was significantly affected （P 〈 0.01） by storage period and the values ranging between 32.20 and 36.40, 48.59 and 58.53 and 32.01 and 43.24 respectively. Storage period had no statistically significant effects on egg shape index and specific gravity. The storage periods on yolk index, yolk colour, albumen index and Haugh unit were statistically significant （P 〈 0.01）. Yolk index value decreased significantly when storage period was lengthened. This study concluded that yolk index, yolk colour, albumen index, albumen percentage and Haugh unit were decreased with increase in storage time.
