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相关概念视频

Epistasis01:39

Epistasis

47.7K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
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Trihybrid Crosses02:27

Trihybrid Crosses

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Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
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Epistasis Analysis01:09

Epistasis Analysis

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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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Monohybrid Crosses01:20

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Overview
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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
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Dihybrid Crosses01:18

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相关实验视频

Updated: Sep 14, 2025

Determination of Self- and Inter-incompatibility Relationships in Apricot Combining Hand-Pollination, Microscopy and Genetic Analyses
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在麦中寻找确定APR表型的基因.

Joanna Szewińska1, Mateusz Matuszkiewicz2, Monika Rakoczy-Trojanowska3

  • 1Institute of Biology, Warsaw University of Life Sciences, Nowoursynowska 159, Warsaw, 02-776, Poland.

BMC plant biology
|July 19, 2025
PubMed
概括

在麦中对叶 (LR) 的成年植物耐药性 (APR) 了解甚少. 研究人员确定了Sclr_ABC25作为一种潜在的基因,在麦中赋予APR到LR,这表明一种独特的抵抗机制.

关键词:
普奇尼亚·雷康迪塔 (Puccinia recondita) f. sp. 的一种植物. 这里是Secalis secalis 的位置.这种谷物叫做"secale cereale".美国ABC运输商ABC运输商成人植物的耐药性 植物的耐药性叶子生的叶子生.人类遗传学分析糖运输公司 糖运输公司

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Last Updated: Sep 14, 2025

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科学领域:

  • 植物病理学 植物病理学
  • 分子遗传学 分子遗传学
  • 农业科学 农业科学

背景情况:

  • 成人植物耐药性 (APR) 是谷物中对叶 (LR) 等病原体的关键遗传防御机制.
  • 尽管已知存在,但对麦中APR的分子基础的理解是有限的.
  • 最近的发现确定了许多ATP结合盒 (ABC) 和糖载体基因变异在麦转录组.

研究的目的:

  • 识别麦中负责APR到叶 (LR) 的基因.
  • 对已知小麦APR基因 (Lr34和Lr67) 的序列相似性和受感染的麦幼苗中的基因表达特征进行调查.

主要方法:

  • 对麦ABC和糖载体基因 (ScLr_ABC,ScLr_SUG) 的家族遗传学分析,以与小麦Lr34和Lr67相似.
  • 对感染了LR.的麦幼苗中基因表达特征的分析.
  • 序列和表达数据的比较,以确定潜在的APR决定因素.

主要成果:

  • 遗传学分析表明,在小麦类基因中缺乏直接的多态度,从而赋予APR.
  • 确定了Sclr_SUG1 (假定Lr67正义) 和Sclr_ABC25 (结构上与Lr34相似) 作为麦中APR的潜在候选物.
  • 只有ScLr_ABC25基因与麦中LR的APR型免疫力有明确的关联.

结论:

  • 这项研究是第一个探索普通麦中APR到LR的遗传决定因素的研究.
  • 麦中APR的分子机制似乎与小麦和大麦中的不同.
  • 这种Sclr_ABC25基因为开发麦APR到LR的分子育种计划提供了一个有希望的目标.