Mutational genomics platform for breeding climate-resilient amaranthus pseudocereal varieties

Overview

This research initiative focuses on advancing the orphan pseudocereal Amaranthus, a semi-domesticated crop recognized for its exceptional nutritional profile, including high protein and beneficial fatty acid content. Despite its superfood potential and ability to contribute to global food security, Amaranthus lacks established breeding techniques and efficient varieties for modern agricultural systems. The project addresses critical limitations in yield, seed dispersal, plant size, and resistance to abiotic stresses such as extreme heat. By integrating chemical mutagenesis with cutting-edge genomics, the initiative aims to develop new Amaranthus varieties that are more efficient, resilient, and suited to the challenges posed by climate change.

Technical specifications

Key methodology and features:

• EMS mutagenesis of Amaranthus hypochondriacus seeds using ethyl methanesulphonate to generate genetic diversity
• Greenhouse cultivation of mutant generation 1 (M1) plants with controlled bagging of individual inflorescences from 60 M1 plants to produce M1 families
• High-throughput screening of M2 seeds sown individually and subjected to severe heat shock at 45°C to identify thermotolerant mutants
• Phenotype confirmation in the M3 generation to validate inherited heat stress resistance
• Whole genome sequencing (WGS) via next-generation sequencing (NGS) of DNA from wild-type and heat stress resistant M3 mutant plants to identify causal genetic variants
• Multi-generational selection pipeline that combines forward genetics with genomic characterization to link phenotype to genotype

Technology readiness level

The project is at an early-to-mid research stage. The mutagenesis protocol, greenhouse infrastructure, and heat shock screening methodology are established. Validation is currently focused on confirming thermotolerance phenotypes across M2 and M3 generations, followed by whole genome sequencing to map the genetic basis of heat stress resistance. Future steps include scaling mutant populations, identifying candidate genes responsible for thermotolerance, and translating these findings into breeding lines suitable for field evaluation in adverse environments.