JAK-STAT通路基因對奶牛乳房炎抗性的遺傳和表觀遺傳效應研究
發(fā)布時間:2021-11-10 04:32
乳房炎是影響奶牛生產經濟效益和動物福利最常見的炎癥疾病,為了降低奶牛乳房炎的發(fā)病率,育種工作者已經將重點轉移到乳房炎抗性奶牛的培育。其中,候選基因法被認為是有效的方法,其目的在于發(fā)現單核苷酸多態(tài)性(SNP),即使該致病基因是微效基因,候選基因法也會對該微效基因進行挖掘。在本研究中,共研究5個炎癥基因,包括CD4基因、LAG3基因和其他3個涉及JAK-STAT信號通路上的基因(JAK2、STAT5A和STAT5B)。本研究使用了綜合的研究方法,其目的如下:1)分析這些基因的SNPs與中國荷斯坦牛的血清細胞因子、乳房炎和產奶性狀的關系;2)針對不同基因型和不同牛群中分析基因表達的差異;3鑒定乳房炎牛與健康牛的DNA甲基化水平差異,挖掘對奶牛乳房炎抗性遺傳機制選擇有效的標記基因。首先,通過DNA混池測序共發(fā)現60個SNPs,其中27個SNPs被用于468頭奶牛群體的關聯(lián)分析,進而對顯著的SNPs進行mRNA表達量測定及啟動子區(qū)CpG島的DNA甲基化鑒定。本課題研究結果如下:1) JAK2基因:JAK2基因共發(fā)現5個新的SNPs。在這5個SNP中,兩個SNP (SNP1A39652267G和S...
【文章來源】:中國農業(yè)大學北京市 211工程院校 985工程院校 教育部直屬院校
【文章頁數】:128 頁
【學位級別】:博士
【文章目錄】:
ABSTRACT
摘要
ACKNOWLEDGEMENTS
DEDICATION
LIST OF TABLES
LIST OF FIGURES
TABLE OF CONTENTS
LIST OF ABBREVIATIONS
INTRODUCTION
1.1 BACKGROUND OF THE RESEARCH
1.2 REVIEW OF LITERATURE
1.3 JUSTIFICATION OF THE STUDY
1.4 Rationale of the study
1.5 OBJECTIVES OF THE STUDY AND TECHNICAL ROUTES
MATERIALS AND METHODS
2.1 Sample collection and phenotypic data
2.2 DNA extraction and SNPs identification
2.3 RNA extraction,cDNA synthesis
2.4 Quantitative real time PCR(qRT-PCR)
2.5 Bisulfite treatment of extracted DNA and hot start PCR
2.6 Quantitative DNA methylation evaluation using pyrosequencing
2.7 Statistical analysis
RESULTS AND DISCUSSION
3.1 SNPs discovery and genotypes
3.2 Results of JAK2 gene
3.3 Results of STAT5A/B genes
3.4 RESULTS AND DISCUSSION OF CD4
3.5 RESULTS AND DISCUSSION OF LAG3
3.6 Combination genotype effect of SNPs in the 5 genes
3.7 Integrating the 2 projects:Grand Analysis
GENERAL DISCUSSION
CONCLUSIONS
REFERENCES
APPENDIX 1
APPENDIX 2
Curriculum vitae
本文編號:3486580
【文章來源】:中國農業(yè)大學北京市 211工程院校 985工程院校 教育部直屬院校
【文章頁數】:128 頁
【學位級別】:博士
【文章目錄】:
ABSTRACT
摘要
ACKNOWLEDGEMENTS
DEDICATION
LIST OF TABLES
LIST OF FIGURES
TABLE OF CONTENTS
LIST OF ABBREVIATIONS
INTRODUCTION
1.1 BACKGROUND OF THE RESEARCH
1.2 REVIEW OF LITERATURE
1.3 JUSTIFICATION OF THE STUDY
1.4 Rationale of the study
1.5 OBJECTIVES OF THE STUDY AND TECHNICAL ROUTES
MATERIALS AND METHODS
2.1 Sample collection and phenotypic data
2.2 DNA extraction and SNPs identification
2.3 RNA extraction,cDNA synthesis
2.4 Quantitative real time PCR(qRT-PCR)
2.5 Bisulfite treatment of extracted DNA and hot start PCR
2.6 Quantitative DNA methylation evaluation using pyrosequencing
2.7 Statistical analysis
RESULTS AND DISCUSSION
3.1 SNPs discovery and genotypes
3.2 Results of JAK2 gene
3.3 Results of STAT5A/B genes
3.4 RESULTS AND DISCUSSION OF CD4
3.5 RESULTS AND DISCUSSION OF LAG3
3.6 Combination genotype effect of SNPs in the 5 genes
3.7 Integrating the 2 projects:Grand Analysis
GENERAL DISCUSSION
CONCLUSIONS
REFERENCES
APPENDIX 1
APPENDIX 2
Curriculum vitae
本文編號:3486580
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