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相关概念视频

What is Climate?01:16

What is Climate?

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Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
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Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Natural Selection and Adaptation01:15

Natural Selection and Adaptation

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Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
Beyond physical adaptations,...
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Responses to Drought and Flooding02:41

Responses to Drought and Flooding

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Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
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Global Climate Change01:50

Global Climate Change

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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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相关实验视频

Updated: Sep 19, 2025

Watershed Planning within a Quantitative Scenario Analysis Framework
12:44

Watershed Planning within a Quantitative Scenario Analysis Framework

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环境数据为预测气候适应提供了边际的好处.

Forrest Li1,2, Daniel J Gates1,3, Edward S Buckler4,5

  • 1Department of Evolution and Ecology, University of California Davis, Davis, California, United States of America.

PLoS genetics
|June 9, 2025
PubMed
概括

基因组数据最能预测玉米产量,环境数据提供了很少额外的洞察力. 环境基因组广泛关联研究 (envGWAS) 仍然可以确定新的适应位置.

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科学领域:

  • 基因组学就是基因组学.
  • 植物育种 植物育种
  • 适应气候变化 适应气候变化

背景情况:

  • 气候变化对野生和耕种物种构成重大挑战.
  • 基因组工具对于识别适应基因在未来气候的保护和繁殖中至关重要.
  • 传统的玉米品种为研究适应提供了宝贵的资源.

研究的目的:

  • 评估气候和基因组数据的有用性,以识别传统玉米品种的适应性等位基因.
  • 为了比较不同的方法来预测预适应和确定与气候适应相关的位置.
  • 评估环境数据和envGWAS优先选择品种的位置的价值.

主要方法:

  • 利用基因型数据来预测生殖质收集的环境特征.
  • 采用环境全基因组关联研究 (envGWAS) 来确定与气候梯度相关的位置.
  • 对玉米产量特征的全基因组相关性,种群结构,envGWAS loci 和原产环境数据的预测能力进行了比较.

主要成果:

  • 玉米产量特征是通过全基因组相关性和种群结构最准确地预测的.
  • 将envGWAS变种或原产环境数据纳入其中,为产量提供了最小的额外预测价值.
  • 环境GWAS在识别与历史气候分歧相关的位置上被证明是有效的.

结论:

  • 仅仅环境数据对预测玉米的健康相关表型的好处有限.
  • 环境GWAS是发现与适应相关的新基点的强大方法.
  • 高密度基因型鉴定与envGWAS相结合,可增强适应位置的识别.