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相关概念视频

Plant Breeding and Biotechnology01:59

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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Light Acquisition02:16

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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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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
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相关实验视频

Updated: Jul 9, 2025

A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines
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两种神制造了现代玉米

Ning Yang1,2,3, Yuebin Wang1, Xiangguo Liu4

  • 1National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China.

Science (New York, N.Y.)
|November 30, 2023
PubMed
概括
此摘要是机器生成的。

现代玉米起源于古代玉米和Zea mays ssp之间的混合物. 在墨西哥的墨西哥. 这种混合物显著塑造了玉米的多样性和农学特征,澄清了它的进化历史.

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科学领域:

  • * 植物遗传学和进化生物学
  • * 农业科学和作物化

背景情况:

  • 一个世纪以来,玉米 (Zea mays) 的起源一直受到争议,现有的遗传和考古模型无法解释所有数据.
  • 最近的研究表明,野生相亲植物Zea mays ssp. 在墨西哥的玉米进化.

研究的目的:

  • 通过种群遗传分析阐明现代玉米的起源.
  • * 调查混合物对玉米多样性和农学特征变化的贡献.

主要方法:

  • * 玉米的种群遗传分析
  • 在化和分散方面分析混合模式.

主要成果:

  • * 现代玉米起源于古代玉米和Zea mays ssp之间的混合事件. 在墨西哥的高地.
  • 这种混合发生在玉米化开始后大约4000年.
  • 混合物变异是个体基因多样性和农业特征的遗传基础的关键因素.

结论:

  • 这项研究阐明了现代玉米的复杂起源,强调了与Zea mays ssp的杂交的重要性. 在墨西哥.
  • 这些发现促使人们对美国玉米的传播机制进行新的调查.