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相关概念视频

Trihybrid Crosses02:27

Trihybrid Crosses

26.2K
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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Dihybrid Crosses01:18

Dihybrid Crosses

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Overview
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Monohybrid Crosses01:20

Monohybrid Crosses

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Overview
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Incomplete Dominance01:43

Incomplete Dominance

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Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
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Asexual Reproduction02:38

Asexual Reproduction

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Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.
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What is a Species?01:17

What is a Species?

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相关实验视频

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Agrobacterium tumefaciens and Agrobacterium rhizogenes-Mediated Transformation of Potato and the Promoter Activity of a Suberin Gene by GUS Staining
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通过单体繁殖生成自我不兼容的杂交土豆.

Dawei Li1,2, Xinyu Jing1,3, Pei Wang1,4

  • 1State Key Laboratory of Genome and Multi-omics Technologies, Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Synthetic Biology, Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China.

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概括

研究人员开发了一种新的土豆育种方法,使用单体育种来制造杂交土豆. 这种方法提高了作物的产量和质量,通过大规模的混合种子生产和优化资源分配来优化芽开发.

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科学领域:

  • 植物育种 植物育种
  • 遗传学 是一个遗传学.
  • 农业科学 农业科学

背景情况:

  • 异质化,或混合活力,在许多作物中显著提高了作物产量和质量.
  • 在自我授粉作物中的杂交繁殖是由种子生产的雄性无菌生产线促进的.
  • 像马这样的无性作物在杂交育种方面面临着独特的挑战,包括种子生产和水果和根茎之间的资源竞争.

研究的目的:

  • 开发一种新的策略,用于在土豆 (Solanum tuberosum L.) 中的混合繁殖,使用单体繁殖.
  • 克服杂交种子生产的挑战,并减少无性繁殖作物的竞争.
  • 提高混合马的产量潜力和收获指数.

主要方法:

  • 通过单体繁殖开发出自我不兼容的同卵性双胞胎土豆及其杂交.
  • 实施了精简的育种设计,以消除空中果实形成.
  • 专注于优化资源分配,以发展地下茎.

主要成果:

  • 在土豆中实现了大规模,低成本的混合种子生产.
  • 成功地消除了空中果实和地下茎水槽之间的竞争.
  • 显著提高了杂交土豆的收获指数.

结论:

  • 杂交繁殖为无性繁殖作物,如马等作物中高效的混合种子生产提供了一个范例.
  • 这一策略有效地解决了水槽竞争,最大限度地提高了收益潜力.
  • 开发的方法提供了一条利用异质化的途径,以改善土豆种植.