Climate - Resilient Rice Varieties: Genetic and Agronomic Strategies for Food Sustainability.
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Abstract
The investigation focused on the coordination of productivity and tolerance in rice (Oryza sativa) varieties for a long period of 30 years (1995–2024). In particular, it was carried out to quantify the relationship between the three independent variables of agricultural performance (crop yield), genetic diversity (robustness) and drought tolerance (resilient tolerance), which are important under consideration for climate change adaptation and development in sustainable crops. A long dataset of the period 1995-2024 was evaluated by considering four main drivers (rice yield [ton/ha], weighted drought resistance, number of genetic types and amount of water use for irrigating [m³]). Trend analysis was also carried out to compare data over time from the baseline in 1995 to final data in 2024. Moreover, correlation analysis was conducted to determine the associations between drought tolerance. The results suggest strong decoupling of productivity and tolerance. The rice yield was improved to about 44.5% (from 29.62 to 42.81 tons/ ha), but genetic variants number and drought tolerance-score decreased around 78 % (from 82.48 to 18.16 and from 96.38 to 21.32, respectively). While this genetic focus allowing periods of extreme high yield (e.g. 74.15 tons/ha in 2018), the drought resistance was drastically reduced. The non-linear relationship was tested, and there is no linear association between drought tolerance and very large irrigation use. The implications are that current breeding and selection regimes have caused extreme genetic funneling, which had the short-term goal of production maximization at the expense of longer term environmental and system stability. As a result, the modern genetic pool of rice has gradually become more susceptible to mounting risks of climate stress. In the future, breeding efforts will need to be directed towards restoring genetic diversity and including quantitative traits (e.g. Water Use Efficiency– WUE) into selection procedures aiming at increased overall stress-resilient productivity rather than simply stress tolerance.
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Publication Details
- Type of Publication:
- Conference Name: Gazipur Agricultural University International Conference (GAUIC 2025)
- Date of Conference: 12/12/2025 - 12/12/2025
- Venue: Gazipur Agricultural University, Gazipur, Bangladesh
- Organizer: Gazipur Agricultural University