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ARS Home » Midwest Area » Columbia, Missouri » Plant Genetics Research » Research » Research Project #441229

Research Project: Utilizing Genes from the Soybean Germplasm Collection to Mitigate Drought Stress

Location: Plant Genetics Research

Project Number: 5070-21000-040-043-R
Project Type: Reimbursable Cooperative Agreement

Start Date: Oct 1, 2021
End Date: Sep 30, 2022

Objective:
Develop and evaluate soybean lines utilizing four traits associated with drought tolerance.

Approach:
Approach 1 – We will develop soybean lines combining all four of these drought-tolerant traits together in a single genetic background, and using the molecular marker data, we will select lines with predicted greatest drought tolerance. Approach 2 - We have over 200,000 F2 soybean seed from crosses between accessions of the four drought-tolerant traits and the elite, hub parent that we will begin screening in 2021; selections made in 2021 will be advanced in 2022 based on agronomic characteristics and genomic selection. These selections will be fast-tracked for future germplasm releases. Approach 3 – We have four advanced breeding lines that have been selected for high WUE and seed heat tolerance/germination. Depending upon results of irrigated and rainfed experiments in 2021, the most promising lines will be entered into regional yield trials in 2022. Approach 4 – We will identify and confirm putative loci of drought tolerance associated traits and characterize trait stability/plasticity. We will map the genomic locations of plasticity alleles, which will provide insights into how plasticity interacts with different environments.