Traditional rice gene characterization for eco-friendly agriculture using beneficial microbial consortia

Overview

This research program focuses on identifying genetic factors in traditional Sri Lankan rice that enable productive interactions with beneficial native microbial consortia. By characterizing these rice-microbe relationships, the work aims to reduce the heavy reliance of commercial rice cultivation on inorganic fertilizers, which are known to cause adverse environmental effects. The program combines a well-established traditional rice germplasm collection with a curated library of plant growth-promoting bacteria isolated from rice-growing environments.

The value proposition for industry partners is a pathway toward eco-friendly rice production through genetic improvement of commercial varieties, supported by validated microbial inoculation strategies. This approach addresses growing demand for sustainable agriculture practices and reduced environmental impact in rice farming.

Technical specifications

Germplasm resources:

• Over 1,000 accessions of traditional Sri Lankan rice characterized for desirable agronomic traits
• Large library of growth-promoting bacteria isolated from rice ecology and tested under greenhouse and field conditions
• 90 bacterial strains evaluated for nutrient availability and growth-promoting substance production

Validated performance:

• Greenhouse trials with n=10 replicates confirming bacterial efficacy
• Field-level experiments using randomized complete block design in 5m x 6m plots
• Bacterial inoculation demonstrated ability to reduce inorganic fertilizer requirement to one-quarter of standard levels

Future research directions:

• Evaluation of plant exudates responsible for attracting beneficial bacteria
• Assessment of plant metabolites influencing bacterial performance inside rice plants
• Identification of genetic factors responsible for strong rice-microbe relationships
• Application of identified genetic factors for rice improvement toward eco-friendly agriculture

Technology readiness level

The research has progressed beyond initial characterization, with greenhouse and field-level validation completed for bacterial inoculation effects on fertilizer reduction. The next phase involves expanding testing to commercially grown rice varieties and identifying the specific genetic and molecular mechanisms underlying the rice-microbe interaction. The technology is at an early-to-mid stage of development, with proven biological efficacy but pending identification of specific genetic factors for breeding applications.