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Related Concept Videos

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).
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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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Hybrid Zones02:29

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Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
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In-situ Hybridization02:31

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In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
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Updated: Nov 9, 2025

Embryo Rescue Protocol for Interspecific Hybridization in Squash
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Plant hybridization.

Loren H Rieseberg1,2, Shanna E Carney1

  • 1Dept of Biology, Indiana University, Bloomington, IN 47405, USA.

The New Phytologist
|April 17, 2021
PubMed
Summary
This summary is machine-generated.

Experimental studies reveal that plant hybridization is crucial for speciation and adaptive evolution. Research highlights the genetic basis of hybrid traits and their evolutionary significance.

Keywords:
Hybridizationintrogressionreproductive isolationspeciation

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Area of Science:

  • Evolutionary Biology
  • Genetics
  • Ecology

Background:

  • Traditional studies focused on documenting plant hybridization occurrence.
  • Recent advances stem from experimental microevolutionary studies.

Purpose of the Study:

  • To explore the role of experimental studies in understanding plant hybridization.
  • To investigate the genetic basis and evolutionary significance of hybrid speciation.

Main Methods:

  • Laboratory and glasshouse synthesis of artificial hybrids.
  • Experimental manipulation of natural hybrid zones.
  • Analyses of morphological character expression and fitness.

Main Results:

  • Gametic selection identified as a prezygotic isolating barrier.
  • Complex genetic basis for hybrid sterility, inviability, and breakdown.
  • Fertility selection plays a critical role in hybrid speciation.
  • Transgressive segregation observed in later-generation hybrids.
  • High variability in hybrid genotype fitness and rapid response to selection.

Conclusions:

  • Experimental approaches provide critical insights into hybridization dynamics.
  • Hybridization is not necessarily an evolutionary dead end.
  • Integrating experimental and historical approaches is key to understanding hybridization's role in evolution and speciation.