The International Oryza Map Alignment Project (IOMAP): the Americas-past achievements and future directions

Area of Science:

• Genetics
• Botany
• Agriculture

Background:

• Wild rice relatives (Oryza species) possess significant genetic diversity crucial for addressing global food security challenges, especially for feeding a projected 10 billion people by 2050.
• The original Oryza Map Alignment Project (OMAP) established genomic resources for wild rice, aiding in the characterization and gene cloning for traits like grain width (GW5) and submergence tolerance (SUB1A).

Purpose of the Study:

• To investigate the historical and current genetic diversity of wild Oryza species native to the Americas.
• To generate a comprehensive diversity panel to assess the genetic status and potential erosion of variation in these populations.
• To identify valuable resistance traits for crop improvement and explore neodomestication strategies for American wild rice species.

Main Methods:

• Sequencing of both herbaria specimens and in situ samples of wild Oryza species from the Americas.
• Development of a large diversity panel to analyze genetic variation over time and across populations.
• Comparative genomic analysis to understand evolutionary relationships and identify key genes.

Main Results:

• The study aims to characterize the genetic landscape of wild rice in the Americas, revealing past and present diversity levels.
• Identification of potential genetic erosion within wild Oryza populations in the region.
• Discovery of diverse resistance traits within American wild rice, valuable for enhancing cultivated rice varieties.

Conclusions:

• The 'IOMAP: the Americas' project will provide critical insights into the genetic resources of wild rice in the Americas, essential for biodiversity conservation.
• The findings will support crop improvement initiatives and the emerging field of cereal neodomestication, building on successes like that in Oryza alta.
• Harnessing the genetic potential of these wild relatives is vital for developing sustainable agricultural solutions to meet future food demands.