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Related Concept Videos

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,...
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Gene Evolution - Fast or Slow?02:05

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The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
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Gene Regulation During Sporulation01:17

Gene Regulation During Sporulation

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Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
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Fruit Development, Structure, and Function01:58

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Fruits form from a mature flower ovary. As seeds develop from the ovules contained within, the ovary wall undergoes a series of complex changes to form fruit. In some fruits, such as soybeans, the ovary wall dries; in other fruits, such as grapes, it remains fleshy. In some cases, organs other than the ovary contribute to fruit formation; such fruits are called accessory fruits.
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Genetic Drift03:33

Genetic Drift

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Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
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Mutation, Gene Flow, and Genetic Drift01:09

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In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
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The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics
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Grape ripening speed slowed down using natural variation.

Luigi Falginella1,2, Gabriele Magris1,3, Simone D Castellarin4

  • 1Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik
|May 30, 2025
PubMed
Summary
This summary is machine-generated.

Genetic modification can slow grape ripening, aiding the wine industry in adapting to climate change. A specific gene variant from Vitis riparia significantly reduces ripening speed, enabling later harvest under milder conditions.

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Area of Science:

  • Viticulture and Enology
  • Plant Genetics
  • Climate Change Adaptation

Background:

  • Grape ripening speed is crucial for winemaking and adapting to climate change.
  • The genetic basis for controlling grape ripening speed has remained largely unknown.
  • Understanding ripening is key to addressing challenges in grapevine (Vitis vinifera) berry development.

Purpose of the Study:

  • To identify the genetic factors controlling grape ripening speed.
  • To explore the potential for genetic adaptation of grapevines to changing environmental conditions.
  • To investigate the role of genetic variation in Vitis species for improving cultivars.

Main Methods:

  • Quantitative trait locus (QTL) analysis to map genes controlling ripening speed.
  • Identification and characterization of specific genetic haplotypes associated with slower ripening.
  • Comparative analysis of Vitis species to assess genetic variation.

Main Results:

  • A major quantitative trait locus (QTL) significantly influencing grape ripening speed was identified.
  • A Vitis riparia haplotype was found to reduce maximum ripening speed by half, irrespective of crop load or berry size.
  • Slow-ripening variants exhibit delayed ripening onset, allowing maturation under cooler autumn weather.

Conclusions:

  • Genetic control of grape ripening speed is achievable and offers a strategy for climate change adaptation in viticulture.
  • Introducing specific alleles from related species like Vitis riparia can enhance the adaptive capacity of Vitis vinifera cultivars.
  • Harnessing genetic diversity is essential for developing grape varieties resilient to global warming and evolving industry demands.