Summary
This study applied quantitative stress indices to screen 14 common bean genotypes for heat tolerance in parallel field and greenhouse trials in Puerto Rico. The stress tolerance index and geometric mean proved effective for identifying genotypes with robust yield performance under both high-temperature stress (>30 °C day / >20 °C night) and normal conditions. The approach supports breeding programmes aiming to develop heat-tolerant common bean germplasm adapted to variable temperature conditions.
Regional applicability
This work was conducted in Puerto Rico under tropical heat conditions not typical of United Kingdom agriculture; however, the stress index methodology may be transferable to UK breeding programmes seeking to develop climate-resilient pulse crops, particularly given projected warming trends. The underlying principle of paired stress/non-stress trials for genotype evaluation is applicable to UK conditions.
Key measures
Geometric mean (GM), stress tolerance index (STI), stress susceptibility index (SSI), yield under stress and low-stress conditions
Outcomes reported
The study evaluated 14 common bean genotypes for heat tolerance using stress indices (geometric mean, stress tolerance index, and stress susceptibility index) in paired field and greenhouse trials under contrasting temperature conditions. Results identified superior genotypes for heat tolerance based on their performance under high-temperature stress.
Topic tags
Dig deeper with Pulse AI.
Ask about this record, its theme or its relevance to UK farming and policy. Pulse AI uses selected catalogue evidence and cites the sources it draws on.