Marker-assisted selection to pyramid nematode resistance and the high oleic trait in peanut

Chu, Y. and Wu, C.L. and Holbrook, C.C. and et al, . (2011) Marker-assisted selection to pyramid nematode resistance and the high oleic trait in peanut. Plant Genome, 4 (2). pp. 110-117.

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Despite important strides in marker technologies, the use of marker-assisted selection has stagnated for the improvement of quantitative traits. Biparental mating designs for the detection of loci affecting these traits (quantitative trait loci [QTL]) impede their application, and the statistical methods used are ill-suited to the traits' polygenic nature. Genomic selection (GS) has been proposed to address these deficiencies. Genomic selection predicts the breeding values of lines in a population by analyzing their phenotypes and high-density marker scores. A key to the success of GS is that it incorporates all marker information in the prediction model, thereby avoiding biased marker effect estimates and capturing more of the variation due to small-effect QTL. In simulations, the correlation between true breeding value and the genomic estimated breeding value has reached levels of 0.85 even for polygenic low heritability traits. This level of accuracy is sufficient to consider selecting for agronomic performance using marker information alone. Such selection would substantially accelerate the breeding cycle, enhancing gains per unit time. It would dramatically change the role of phenotyping, which would then serve to update prediction models and no longer to select lines. While research to date shows the exceptional promise of GS, work remains to be done to validate it empirically and to incorporate it into breeding schemes.

Item Type: Article
Additional Information: The authors would like to thank Shannon Atkinson, Jason Golden, Kathy Marchant, Evelyn P. Morgan, and Betty Tyler for technical assistance. This project was funded by the Georgia Seed Development Commission, the University of Georgia Research Foundation Cultivar Development Program, and the Georgia Peanut Commission.
Uncontrolled Keywords: Cleaved amplified polymorphic sequence, Cetyltrimethyl ammonium bromide, Ethylenediaminetet,raacetic acid, Marker-assisted selection, Oleic:linoleic acid, Polymerase chain reaction, Rootknot nematode, Single nucleotide polymorphism, Simple sequence repeat.
Author Affiliation: Department of Horticulture, University of Georgia Tifton Campus, Gerogia.
Subjects: Crop Improvement
Crop Improvement > Plant Breeding
Divisions: Groundnut
Depositing User: Mr Arbind Seth
Date Deposited: 01 Jan 2013 10:46
Last Modified: 01 Jan 2013 10:46
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