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相关概念视频

Trihybrid Crosses02:27

Trihybrid Crosses

23.0K
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...
23.0K
Dihybrid Crosses01:18

Dihybrid Crosses

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Overview
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Pleiotropy01:33

Pleiotropy

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Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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Monohybrid Crosses01:20

Monohybrid Crosses

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Overview
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Genetic Variation01:25

Genetic Variation

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Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
256
Light Acquisition02:16

Light Acquisition

8.4K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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相关实验视频

Updated: May 28, 2025

Micron-scale Phenotyping Techniques of Maize Vascular Bundles Based on X-ray Microcomputed Tomography
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Micron-scale Phenotyping Techniques of Maize Vascular Bundles Based on X-ray Microcomputed Tomography

Published on: October 9, 2018

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结构变异有助于玉米的表型变化.

Nathan S Catlin1,2,3, Husain I Agha1,3, Adrian E Platts1

  • 1Department of Plant Biology, Michigan State University, East Lansing, Michigan, USA.

Molecular ecology
|February 13, 2025
PubMed
概括

研究人员开发了一种新的方法来检测玉米中的结构变异 (SV),包括可转移元素 (TE),使用短读序列. 这种技术将SV与重要的生命史特征和基因型与环境相互作用联系起来.

关键词:
农业 农业 农业 农业生命史 进化 生命史 进化现型性可塑性 现型性可塑性人口遗传学 经验性遗传学定量遗传学定量遗传学结构变体 结构变体

更多相关视频

Author Spotlight: Improved Methods for Preparing Transverse Sections and Unrolled Whole Mounts of Maize Leaf Primordia for Fluorescence and Confocal Imaging
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Author Spotlight: Improved Methods for Preparing Transverse Sections and Unrolled Whole Mounts of Maize Leaf Primordia for Fluorescence and Confocal Imaging

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Experimental Design for Laser Microdissection RNA-Seq: Lessons from an Analysis of Maize Leaf Development
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Experimental Design for Laser Microdissection RNA-Seq: Lessons from an Analysis of Maize Leaf Development

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相关实验视频

Last Updated: May 28, 2025

Micron-scale Phenotyping Techniques of Maize Vascular Bundles Based on X-ray Microcomputed Tomography
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Micron-scale Phenotyping Techniques of Maize Vascular Bundles Based on X-ray Microcomputed Tomography

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Author Spotlight: Improved Methods for Preparing Transverse Sections and Unrolled Whole Mounts of Maize Leaf Primordia for Fluorescence and Confocal Imaging
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Author Spotlight: Improved Methods for Preparing Transverse Sections and Unrolled Whole Mounts of Maize Leaf Primordia for Fluorescence and Confocal Imaging

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Experimental Design for Laser Microdissection RNA-Seq: Lessons from an Analysis of Maize Leaf Development
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Experimental Design for Laser Microdissection RNA-Seq: Lessons from an Analysis of Maize Leaf Development

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科学领域:

  • 基因组学就是基因组学.
  • 植物生物学 植物生物学
  • 人口遗传学 人口遗传学

背景情况:

  • 鉴定特征变异的遗传位置是很困难的,因为检测各种遗传变异的局限性.
  • 结构变异 (SVs),特别是可转移元素 (TE),被怀疑会影响表型变异,但缺乏使用短读序列的检测方法.

研究的目的:

  • 开发和应用一种方法来检测多态SV和TEs在一个大玉米多样性面板使用短读序列数据.
  • 在玉米中将 SV 变异与生命史特征和基因型与环境 (GxE) 相互作用联系起来.

主要方法:

  • 两种玉米基因型之间的全基因组对齐,以识别多态SVs.
  • 用短读序列数据对已识别的SV进行大型玉米多样性面板的基因定型.
  • 用特征和GxE相互作用对SV的关联分析.

主要成果:

  • 建立了一种技术,通过使用基因组短读序列对齐,在一个大型多样性面板中对SV多态基因组进行基因型定型.
  • 成功地将SV多态性与多样化的生命史特征和GxE相互作用联系起来.
  • 大多数与特征相关的SV含有TE;一些可能是删除,而另一些则表示TE插入.
  • 一个TE插入类型的SV显示了与基因表达的显著关联.

结论:

  • 开发的方法可以在大量人群中对SVs进行可靠的基因定型.
  • 包括TEs在内的SV变异对玉米的特征变异和GxE相互作用有显著的贡献.
  • 虽然SV与特征相关,但这些关联被发现与附近的SNP存在联系不平衡.