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相关概念视频

Epigenetic Regulation01:37

Epigenetic Regulation

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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Genomic Imprinting and Inheritance02:30

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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Inheritance of Chromatin Structures03:17

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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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Epistasis Analysis01:09

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Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
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Eukaryotes have large genomes compared to prokaryotes. To fit their genomes into a cell, eukaryotic DNA is packaged extraordinarily tightly inside the nucleus. To achieve this, DNA is tightly wound around proteins called histones, which are packaged into nucleosomes that are joined by linker DNA and coil into chromatin fibers. Additional fibrous proteins further compact the chromatin, which is recognizable as chromosomes during certain phases of cell division.
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Updated: May 30, 2025

Sample Preparation to Bioinformatics Analysis of DNA Methylation: Association Strategy for Obesity and Related Trait Studies
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一种递归模型方法,将表观遗传效应纳入基因评估中,使用模拟的DNA甲基化效应.

Adrián López-Catalina1,2,3, Mohamed Ragab1, Antonio Reverter3

  • 1Departamento de Mejora Genética Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), CSIC, Madrid, Spain.

Journal of animal breeding and genetics = Zeitschrift fur Tierzuchtung und Zuchtungsbiologie
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PubMed
概括
此摘要是机器生成的。

这项研究引入了一个多原子模型 (GOBLUP),将DNA甲基化数据整合到动物育种中. 为了提高准确性,GOBLUP通过分离附加遗传和表观遗传变异来改善育种决策.

关键词:
这就是GOBLUP的意义.育种计划 育种计划 育种计划牛奶牛甲基化 牛奶牛甲基化线性混合模型中的表观遗传学

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科学领域:

  • 动物遗传学和动物基因组学
  • 表观遗传学和定量遗传学
  • 生物信息学和统计建模.

背景情况:

  • 基因甲基化是影响基因调节和动物特征的关键表观遗传机制.
  • 高通量测序的进步使得大规模,负担得起的甲基化数据的捕获成为可能.
  • 将多原子数据集成到遗传评估模型中,对于改善动物育种至关重要.

研究的目的:

  • 调整和评估一个多原子模型 (GOBLUP),将DNA甲基化数据纳入遗传评估中.
  • 评估模型分离附加遗传和表观遗传变异的能力.
  • 开发和验证一个估计表观遗传价值 (EEV) 以改善育种决策.

主要方法:

  • 基于6只奶牛的数据,对13,183只基因型动物的模拟甲基化概况.
  • 作为添加性特征对甲基化敏感性进行了处理,并模拟了甲基化调节性特征.
  • 调整了GOBLUP多原子模型,并将其与传统BLUP方法进行了比较.

主要成果:

  • 戈布卢普准确估计了甲基化责任和表观遗传学调节性特征的遗传性.
  • 该模型有效地分离了附加遗传和表观遗传变异.
  • 新的估计表观遗传值 (EEV) 与传统的EBV相比,与真正的育种值的相关性更高.

结论:

  • GOBLUP多原子模型有效地整合了DNA甲基化数据,以改善动物育种中的遗传评估.
  • 考虑到对DNA甲基化的遗传责任,可以提高育种决策和选择精度.
  • 具有成本效益的同时获取遗传和表观遗传数据将进一步提高育种准确性.