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United States Department of Agriculture

Agricultural Research Service

Research Project: DEVELOPMENT OF IMPROVED PEANUT GERMPLASM AND RESISTANCE TO DISEASE AND NEMATODE PESTS

Location: Crop Genetics and Breeding Research

Title: Ongoing efforts and future plans for phenotyping to complement genomic advances in peanut

Authors
item Holbrook, C
item Ozias-Akins, P -
item Chu, Y -
item Gill, R -
item Isleib, T -
item Culbreath, A -
item Guo, Baozhu
item Brenneman, T -

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: March 15, 2013
Publication Date: June 15, 2013
Citation: Holbrook Jr, C.C., Ozias-Akins, P., Chu, Y., Gill, R., Isleib, T.G., Culbreath, A.K., Guo, B., Brenneman, T.B. 2013. Ongoing efforts and future plans for phenotyping to complement genomic advances in peanut. Proc. 6th International Conference on Advances in Arachis through Genomics and Biotechnology.

Interpretive Summary: not required

Technical Abstract: Ongoing and planned genomic research in the peanut community should lead to the development of additional molecular markers that will be useful in peanut cultivar development. However, to achieve this, much work will need to be done to associate these genetic markers with important phenotypic traits. Phenotyping will need to be conducted in appropriate populations. We developed sixteen structured RIL populations and have begun high-resolution phenotyping of these populations. Crosses were made using a 2 x 8 (common x unique) factorial nested association mapping design. Parents were selected to attempt to maximize genetic diversity while meeting practical breeding objectives. First, two modern runner cultivars (Tifrunner and Florida-07) were selected as common parents because runner cultivars account for about 80% of the production in the US. Second, the eight unique parents were selected to supply diversity across market classes and botanical varieties and are donors of favorable alleles for enhancing drought tolerance and resistance to most important diseases of peanut in the US. The eight unique parents are N08082olJCT (a Bailey derived high oleic breeding line), C76-16, NC 3033, SPT 06-06, SSD 6 (PI 576638), OLin, New Mexico Valencia A, and Florunner. The 16 populations were advanced using summer and winter nurseries. Input from multiple disciplines has resulted in a list of populations and traits that should be examined first, and seed increase has begun to provide the community with material for extensive phenotyping. In-depth phenotyping and genotyping of these populations is likely to result in the development of markers that can be deployed by breeding programs for the development of improved cultivars.

Last Modified: 10/1/2014
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