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ARS Home » Southeast Area » Griffin, Georgia » Plant Genetic Resources Conservation Unit » Research » Publications at this Location » Publication #318198

Research Project: Conservation, Characterization, and Evaluation of Plant Genetic Resources and Associated Information

Location: Plant Genetic Resources Conservation Unit

Title: Genetic variation in the US Peanut Mini-core collection for agronomy, seed chemistry and nutrient quality traits in peanut

Author
item CHEN, CHARLES - Auburn University
item Wang, Ming
item Dean, Lisa
item BARKLEY, NOELLE - International Potato Center
item HAGAN, AUSTIN - Auburn University
item Dang, Phat
item Holbrook, Carl - Corley
item Butts, Christopher - Chris
item Lamb, Marshall
item Sanders, Timothy

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/15/2015
Publication Date: 11/18/2015
Citation: Chen, C.Y., Wang, M.L., Dean, L.L., Barkley, N.L., Hagan, A., Dang, P.M., Holbrook Jr, C.C., Butts, C.L., Lamb, M.C., Sanders, T.H. 2015. Genetic variation in the US Peanut Mini-core collection for agronomy, seed chemistry and nutrient quality traits in peanut.[abstract] ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 363-3.

Interpretive Summary: The ongoing genome sequencing effort in peanut will result in numerous molecular markers that can be applied to the diverse collection of recently purified mini-core germplasm. This will provide an opportunity to mine valuable genes for peanut cultivar improvement. Association mapping based on linkage disequilibrium (LD) provides a more effective way to map trait loci since ancestral recombination events that occurred in natural populations present a potentially large number of alleles per locus to associate markers and traits. Phenotyping of the US mini-core collection have demonstrated large genetic variations in yield, seed size, and grade, resistance to early and late leaf spot, TSWV, seed chemistry and nutrient quality. In-depth phenotyping of this diverse collection is likely to identify markers that can be employed by breeding programs to enrich the marker-traits detection. Some superior accessions with desirable traits have been identified for peanut cultivar improvement.

Technical Abstract: The ongoing genome sequencing effort in peanut will result in numerous molecular markers that can be applied to the diverse collection of recently purified mini-core germplasm. This will provide an opportunity to mine valuable genes for peanut cultivar improvement. Association mapping based on linkage disequilibrium (LD) provides a more effective way to map trait loci since ancestral recombination events that occurred in natural populations present a potentially large number of alleles per locus to associate markers and traits. Phenotyping of the US mini-core collection have demonstrated large genetic variations in yield, seed size, and grade, resistance to early and late leaf spot, TSWV, seed chemistry and nutrient quality. In-depth phenotyping of this diverse collection is likely to identify markers that can be employed by breeding programs to enrich the marker-traits detection. Some superior accessions with desirable traits have been identified for peanut cultivar improvement.