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Related Experiment Video

Updated: Mar 21, 2026

Ploidy Manipulation of Zebrafish Embryos with Heat Shock 2 Treatment
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Cenh3: An Emerging Player in Haploid Induction Technology.

Anne B Britt1, Sundaram Kuppu1

  • 1Department of Plant Biology, University of California, Davis Davis, CA, USA.

Frontiers in Plant Science
|May 6, 2016
PubMed
Summary

Centromere-specific histone H3 variants (CENH3) can induce haploids, accelerating crop breeding. Recent advancements enable non-transgenic haploid induction, significantly speeding up the development of true-breeding crop lines.

Keywords:
CENH3Centromerehaploid inductionplant breedinguniparental inheritance

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Area of Science:

  • Plant genetics
  • Crop breeding
  • Molecular biology

Background:

  • True-breeding lines are crucial for crop development, traditionally requiring lengthy inbreeding (7-9 generations).
  • Haploid induction and chromosome doubling offer a faster route to true-breeding lines, but existing methods are crop-specific.
  • Previous work identified transgenic centromere-specific histone H3 variant (CENH3) manipulation for haploid induction in Arabidopsis and maize.

Purpose of the Study:

  • To explore non-transgenic methods for inducing haploids in crop species.
  • To investigate the potential of alien CENH3 introgression and CENH3 point mutations for haploid induction.
  • To develop faster and more broadly applicable techniques for creating true-breeding crop lines.

Main Methods:

  • Complementation of a cenh3 null mutant with CENH3 from related species.
  • Induction of point mutations in CENH3 using chemical agents.
  • Crossing CENH3-variant plants with wild-type CENH3 plants.

Main Results:

  • Introgression of alien CENH3 can create non-transgenic haploid-inducing plants.
  • Chemically induced point mutations in CENH3 lead to haploid induction upon crossing with wild-type plants.
  • CENH3-variant plants exhibit normal growth, fertility, and can be found in existing mutagenized collections.

Conclusions:

  • Non-transgenic haploid induction is achievable through modifications of CENH3.
  • These methods offer a significant advancement over traditional breeding and existing haploid induction techniques.
  • The findings pave the way for rapid development of homozygous lines in diverse crop species.