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ARS Home » Pacific West Area » Pullman, Washington » Plant Germplasm Introduction and Testing Research » Research » Research Project #434246

Research Project: Management of Temperate-adapted Forage Legume Genetic Resources and Associated Information

Location: Plant Germplasm Introduction and Testing Research

Project Number: 2090-21000-026-00-D
Project Type: In-House Appropriated

Start Date: Jan 29, 2018
End Date: Jan 28, 2023

Objective:
Objective 1: Efficiently and effectively acquire temperate-adapted forage legume genetic resources; maintain their safety, genetic integrity, health and viability; and distribute them and associated information worldwide. Subobjective 1A: Introduce germplasm that fills gaps, is vulnerable or has agronomic potential through plant donations, exchanges and/or explorations. Subobjective 1B: Regenerate temperate-adapted forage legume accessions focusing on low quantity and low viability inventories. Subobjective 1C: Screen for gene flow in germplasm regenerations by assessing adventitious presence of glyphosate resistant seed. Objective 2: Develop more effective genetic resource maintenance, characterization and evaluation methods and apply them to priority genetic resources of temperate-adapted forage legumes. Record and disseminate evaluation and characterization data and digital images via GRIN-Global and other data sources. Subobjective 2A: Using standard and/or new methods, generate and provide access to characterization and evaluation data, collected during in-house regenerations and by leveraging extensive project stakeholder and collaborator networks. Subobjective 2B: Using innovative and diverse molecular marker techniques, estimate genetic diversity and redundancy, identify gaps in coverage and maintain genetic integrity in forage legume germplasm. Objective 3: With other NPGS genebanks and Crop Germplasm Committees, develop, update, document, and implement best management practices (particularly for alfalfa with genetically engineered traits) and Crop Vulnerability Statements for temperate-adapted forage legume genetic resource and information management.

Approach:
Acquisition of new germplasm will be achieved through collecting and germplasm exchanges. Identifying traits important to the stakeholder community and by comparing representation to current holdings, acquisition targets can be focused. Detailed passport information associated with acquisitions, as well as the germplasm, will become available through the GRIN-Global database. Regenerations will use best management practices to maintain genetic integrity of individual accessions. Prioritization of germplasm to be regenerated will be determined using weighted factors including low seed amounts, viability, age of seed, existence of backup samples, difficulty in regeneration and frequency of requests. Commercial genetically engineered alfalfa is in production and additional measures will be implemented to prevent gene flow. Insect-proof field cages will be placed over all individual accessions from bloom through harvest. Sentinel plots will be used as an effective way of monitoring field site and detecting adventitious presence and possible gene flow. Morphological and molecular techniques will be used to characterize genetic diversity and redundancy, identification of gaps and genetic integrity in the collections. Field and greenhouse-based characterizations and evaluations will be conducted and will focus on disease resistance and agronomic traits using standard test protocols. In addition, digitally captured diagnostic images of floral, fruit, and seed characteristics of regenerated germplasm will be collected. All characterization and evaluation data will be uploaded into the Germplasm Resources Information Network (GRIN-Global) database. As new management techniques are adapted and adopted to increase efficiency and are implemented to secure genetic integrity of germplasm, the standard operating procedures manual will need to be periodically updated. Updated Crop Vulnerability Statements (CVS) will also be developed in consultation with stakeholder community for the major crops managed by the project.