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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).
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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To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
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Alleles are different forms of the same gene. Humans and other diploid organisms inherit two alleles of every gene, one from each parent.
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Related Experiment Video

Updated: May 3, 2026

Assessing Differences in Sperm Competitive Ability in Drosophila
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Gamete selection with an inbred tester.

M Z El-Hifny1, M S Ahmad, J D Smith

  • 1Texas A & M University, College Station, Texas.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik
|January 18, 2014
PubMed
Summary

Gamete selection efficiently extracts superior gene combinations from hybrid populations. Using an inbred tester enhances this method by reducing genetic variability and providing a homogeneous comparison.

Area of Science:

  • Plant breeding and genetics
  • Quantitative genetics
  • Genomic selection

Background:

  • Hybrid populations offer genetic diversity for crop improvement.
  • Efficient methods are needed to identify superior gene combinations within these populations.
  • Inbred lines are crucial for evaluating genetic potential.

Purpose of the Study:

  • To evaluate the efficacy of gamete selection in complex hybrid populations.
  • To assess the role of an inbred tester in improving selection efficiency.
  • To validate STADLER'S hypothesis on gamete selection.

Main Methods:

  • Utilized a common inbred tester for gamete evaluation.
  • Selected gametes from three complex hybrid populations.
  • Employed two distinct inbred lines as elite lines for comparison.

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Main Results:

  • Gamete selection proved effective in identifying superior gene combinations.
  • The inbred tester significantly increased the resolving power of the selection method.
  • Extraneous genetic variability was minimized by the inbred tester.
  • A homogeneous check population was established for robust comparisons.

Conclusions:

  • Gamete selection is a powerful strategy for plant breeding.
  • Inbred testers enhance the precision and efficiency of genetic selection in hybrids.
  • This approach facilitates the extraction of elite genetic material from complex populations.