Space-Mutagenized Heat-Tolerant Amaranth Cultivars for Greenhouse Farming

Technology overview

Singapore’s greenhouse and rooftop farming sector faces challenges in maintaining leafy vegetable productivity under high tropical temperatures, resulting in reduced yields and higher cooling costs. This technology uses space-induced mutagenesis to generate genetic diversity in Amaranthus tricolor, followed by advanced phenotyping, multi-omics analysis, and greenhouse trials to identify heat-tolerant, high-yielding cultivars.

Technology features

• Space-derived genetic diversity: Eight months of exposure aboard the international space station (ISS) generated diverse genetic and transcriptomic variations, providing a novel resource for crop improvement. 

• Two-stage heat-stress screening: Elite lines were identified through controlled heat-stress trials followed by greenhouse validation under temperatures reaching 40–42°C, confirming their resilience under commercial conditions. 

• Multi-omics characterisation: Genomic and transcriptomic analyses were used to identify genetic and molecular changes associated with heat tolerance and enhanced biomass productivity, with potential for developing molecular markers. 

• Speed breeding: Optimised controlled-environment conditions and extended photoperiods were developed to accelerate generation turnover and shorten the time required to develop stable elite cultivars. 

• Multi-location validation and Plant Variety Protection (PVP) readiness: Elite lines were validated in multiple greenhouse and rooftop farm environments in Singapore to support Plant Variety Protection and future commercialisation. 

Potential applications

• Greenhouse and Singapore Controlled Environment Agriculture (SCEA) application 

• Urban and vertical farming

• Seed production and commercialisation

• Molecular breeding tools

• Space-enabled Agri-biotechnology

Benefits

• Novel space-derived genetic diversity: Space mutagenesis using cosmic radiation and microgravity generates unique genetic variation in Amaranthus, providing new resources for crop improvement. 

• Optimised for tropical conditions: Improved lines are specifically selected and validated for high-temperature and high-humidity greenhouse environments in Singapore and Southeast Asia. 

• Enhanced nutritional value: Amaranthus provides high levels of protein, fibre, and iron, supporting both food and nutritional security. 

• Integrated breeding pipeline: Combines space mutagenesis, high-throughput phenotyping, multi-omics analysis, and multi-location farm trials to accelerate the identification and validation of elite cultivars. 

Commercialisation

The technology is available for licensing and technology transfer.

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