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Novel technologies in doubled haploid line development.

Jiaojiao Ren1,2, Penghao Wu3, Benjamin Trampe2

  • 1National Maize Improvement Center of China, China Agricultural University, Beijing, China.

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|August 11, 2017
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Summary

Doubled haploid (DH) technology accelerates crop breeding by inducing haploids and doubling their genomes. Recent advances focus on chromosome elimination for haploid induction and minichromosome technology for efficient genome doubling.

Keywords:
chromosome eliminationdoubled haploidgenome doublinghaploidizationminichromosome

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Area of Science:

  • Plant breeding
  • Genetics
  • Molecular biology

Background:

  • Doubled haploid (DH) technology significantly shortens breeding cycles and enhances genetic gain in crop improvement.
  • Key steps in DH technology include haploid induction and subsequent genome doubling.
  • Haploid induction methods encompass gametophyte culture and chromosome elimination, with recent focus on centromere-mediated approaches.

Purpose of the Study:

  • To review recent advances in haploid induction via chromosome elimination.
  • To introduce a novel strategy combining haploids and minichromosome technology for improved genome doubling.
  • To highlight the broad applications of DH technology in plant genetics and breeding.

Main Methods:

  • Focus on haploidization through chromosome elimination, particularly centromere-mediated methods.
  • Proposes a new strategy for genome doubling using minichromosome technology.
  • Discusses established methods for haploid generation (gametophyte culture, inter-/intraspecific methods).

Main Results:

  • Centromere-mediated haploidization represents a significant recent advance in induction techniques.
  • The proposed strategy enhances haploid genome doubling efficiency.
  • DH technology, with improved induction and doubling, supports diverse applications like reverse breeding and CMS line production.

Conclusions:

  • Advances in haploid induction and genome doubling are crucial for efficient DH technology.
  • The integration of minichromosome technology offers a promising avenue for improving DH line production.
  • DH technology is a powerful tool for accelerating crop genetic improvement and analysis.