Exploring potential strategies for haploid induction based on double fertilization in plants

Area of Science:

• Plant genetics and breeding
• Reproductive biology in flowering plants
• Crop genetic improvement

Background:

• Haploid induction (HI) is crucial for rapid crop genetic improvement and shortening breeding cycles.
• Current HI methods are limited to a few crops, and the underlying biological mechanisms are not well understood.
• Understanding HI mechanisms is essential for expanding its application in diverse crop species.

Purpose of the Study:

• To review potential haploid induction (HI) routes.
• To identify novel strategies for discovering HI-related genes.
• To explore the integration of genome editing with HI for enhanced crop breeding.

Main Methods:

• Review of existing literature on haploid induction (HI) and double fertilization.
• Analysis of five potential HI pathways.
• Proposal of new methods for gene discovery, including sperm DNA fragmentation and ectopic expression of embryogenesis activators.
• Discussion on combining genome editing with HI.

Main Results:

• Five potential haploid induction (HI) routes are summarized based on double fertilization events.
• Sperm DNA fragmentation and ectopic expression of embryogenesis activators are proposed as key strategies for discovering new HI-related genes.
• The combination of genome editing techniques with HI is highlighted as a promising approach.

Conclusions:

• Further research into proposed HI routes and gene discovery methods can deepen the understanding of HI mechanisms.
• Integrating genome editing with HI offers a powerful strategy to accelerate crop improvement and doubled haploid breeding.
• This review provides a framework for future research directions in haploid induction and crop breeding.