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Submitted to: Meeting Abstract
Publication Type: Abstract Only Publication Acceptance Date: 9/16/2014 Publication Date: 11/12/2014 Citation: Barkley, N.L. 2014. Roadmap of the USDA peanut germplasm collection: past, present and future direction. Advances in Arachis through Genomics and Biotechnology. [abstract]. Interpretive Summary: Technical Abstract: The USDA ARS PGRCU maintains the second largest Arachis germplasm collection in the world with 9,321 cultivated and 655 wild entries. In the last twenty years, USA germplasm has been provided to over 52 countries around the world for research and breeding purposes. This collection has proven to be a useful resource to mine for traits to improve peanuts by identifying sources of resistance for root knot nematode, leaf spot, tomato spotted wilt virus (TSWV), preharvest aflatoxin, and Sclerotinia. Progress has been made in the last few years to improve the overall state of this valuable collection. The number of unavailable lines in this collection has dropped by 20% in three years which allows researchers and breeders access to the germplasm needed for their programs. Germination data on all the accessions has now been collected allowing more informed decisions on regeneration priorities. Storage conditions have been improved by building additional -18C cold storage space which should improve the overall longevity of the seeds in storage. Genetic gaps have been filled by exchanging material with national and international breeders, as well as, genebanks around the world which has significantly increased the number of cultivated and wild species in the USA collection. Intensive phenotyping and genotyping work is being collected on important collections such as the core and mini core to provide information to the breeders in order to make improved selections for their breeding programs. All of these changes are helping to strengthen the state of the collection and its overall utilization. |
