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United States Department of Agriculture

Agricultural Research Service

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Location: Plant Genetic Resources Conservation Unit

2012 Annual Report

1a. Objectives (from AD-416):
The objective of this research is: 1. To identify resistant germplasm for rust and leafspot. 2. To process imported germplasm through plant quarantine. 3. Transfer disease-free germplasm to the University of Florida cooperator.

1b. Approach (from AD-416):
Our approach is to identify peanut material from literature and other germplasm collections resistant to leafspot and rust. Also, we will process material imported to the U.S. for the project through plant quarantine and ship the material to our University of Florida Cooperator.

3. Progress Report:
Peanut breeding for disease resistance is conducted in support of NP301 Project # 6607-21000-010-00D Objective 3: Strategically characterize (“genotype”) and evaluate (“phenotype”) priority vegetable, sorghum, peanut, subtropical/tropical legume, and warm-season grass genetic resources for molecular markers, morphological descriptors, and key agronomic or horticultural traits such as biochemical content and product quality; and Subobjective 3.B: Extend ongoing cooperative research to update and apply phenotypic descriptors for vegetables, peanuts, warm-season grasses, and subtropical/tropical legumes. Incorporate phenotypic data into Germplasm Resources Information Network (GRIN) and/or other databases. The peanut curator traveled to Bolivia to visit field plots and help rate peanut germplasm and breeding lines on leaf spot and rust resistance. A germplasm center and laboratories in Bolivia were also visited and discussions were held on acquiring germplasm, transferring technology of Fatty Acid Desaturase 2 (FAD2) genotyping for the high oleic acid trait, as well as, aflatoxin testing to Bolivian scientists. A presentation was made for Bolivian scientists on FAD2 genotyping and utilizing significant associations of molecular markers with agronomic traits in the U.S. peanut mini core collection. A total of 47 peanut lines from Bolivia were shipped to Griffin, GA, to be processed through quarantine. These lines have been tested for peanut stripe and peanut mottle virus and samples found to be positive were destroyed during quarantine. A total of 1,233 pods and 3,006 seeds were produced from these 47 lines and sent to a University of Florida cooperator for disease resistance evaluations.

4. Accomplishments

Last Modified: 06/25/2017
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