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相关概念视频

Light Acquisition02:16

Light Acquisition

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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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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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Transgenic Plants02:50

Transgenic Plants

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Recombinant DNA technology called transgenesis is often used to add a foreign gene or remove a detrimental gene from an organism. Such genetically modified organisms are called transgenic organisms.
The first-ever transgenic plant was a tobacco plant developed in 1983 that showed resistance against the tobacco mosaic virus. Since then, many transgenic plants have been developed and commercialized for improving the agricultural, ornamental, and horticultural value of a crop plant. Transgenic...
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Plant Breeding and Biotechnology

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Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
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相关实验视频

Updated: Jul 20, 2025

Author Spotlight: Streamlining Rice Breeding with CRISPR/Cas for Obtaining Optimal Phenotypic and Agronomic Traits
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使用光谱表型化进行转基因大米种子歧视的简洁级联方法.

Jinnuo Zhang1, Xuping Feng2, Jian Jin1

  • 1Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907, USA.

Plant phenomics (Washington, D.C.)
|July 31, 2023
PubMed
概括

一种新方法使用光谱成像和深度学习快速识别转基因大米种子. 这种方法为检测转基因特征提供了高精度,提高了食品安全和可追溯性.

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科学领域:

  • 农业科学 农业科学
  • 频谱学是一种光谱学.
  • 生物信息学是一种生物信息学.

背景情况:

  • 全球法规要求农业食品市场对转基因生物的严格可追溯性.
  • 目前对转基因产品的检测方法复杂,耗时,需要专门的专业知识.
  • 确保食品的安全,完整性和准确标签,需要可靠的转基因检测技术.

研究的目的:

  • 通过光谱成像和深度学习开发一个快速而简洁的管道来识别转基因大米种子.
  • 在大米中研究由特定的转基因特征 (cry1Ab/cry1Ac基因) 诱导的代谢变异.
  • 建立一个有效和高效的方法来检测转基因大米种子,提高食品安全和风险评估.

主要方法:

  • 开发了一种结合光谱成像 (近红外和太赫兹) 与级联深度学习模型的管道方法.
  • 分析了三种大米种子系的新陈代谢成分,其中包含 cry1Ab/cry1Ac 基因,以确定转基因诱导的变异.
  • 使用修改后的引导反向传播算法来选择特征波长,减少光谱数据冗余.

主要成果:

  • 来自不同基因型的光谱数据揭示了转基因代谢变异的规律性.
  • 级联深度学习模型实现了高精度:97.04%的品种分类和99.71%的转基因身份识别使用太赫兹光谱.
  • 提出的方法证明了在检测转基因大米种子方面的可行性,简单性和有效性.

结论:

  • 开发的光谱成像和深度学习管道为识别转基因大米种子提供了快速而准确的工具.
  • 太赫兹吸收光谱对于区分转基因特征和品种尤其有价值.
  • 这种方法具有加速转基因风险评估和改善转基因产品可追溯性的巨大潜力.