Abstract
The Phaseolus collection is the largest collection maintained at WRPIS. It numbers 11,501 accessions with 1585 accessions pending PI assignment. Over 20% of the Phaseolus accessions must be handled in special ways because of unique pollination or day length requirements. In accordance with the stated mission of the project, evolution of the bean germplasm maintenance program has included the following innovations: 1. Expanded interaction with the international germplasm centers (i.e. CIAT) and national programs. 2. As a result of interactions with the Phaseolus CAC, the increase of this genus was moved to greenhouse production exclusively. 3. A program to clean up seedborne viruses in the Phaseolus collection was established. 4. For some of the wild species, it was necessary to establish suitable and reliable alternate regeneration sites. 5. In collaboration with the Bean Improvement Cooperative (BIC) Bean Genetics Committee, WRPIS assumed responsibility for the Genetic Stocks Collection. 6. Develop a core subset of the P. vulgaris collection based on passport data, plant characters and molecular markers.
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