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United States Department of Agriculture

Agricultural Research Service


Location: Vegetable Crops Research

2013 Annual Report

1a. Objectives (from AD-416):
We will significantly increase the numbers of robust single nucleotide polymorphisms (SNPs) and develop a high through-put genotyping platform for onion. Workshops will be held at regional and national Allium meetings.

1b. Approach (from AD-416):
Develop a detailed genetic map for onion: Identify simple single nucleotide polymorphisms (SNPs) in onion; Develop high throughput SNP genotyping platform for onion; and Develop workshops for public and private-sector researchers, students, and regional grower and consumer groups for onion to illustrate the usefulness of genomics to solve high-priority research goals.

3. Progress Report:
This project was renumbered from 3655-21000-048-11A to 3655-21000-062-02A. This is the final report, project terminated 05/31/2013. Random sequences from complementary deoxyribonucleic acid (cDNA) libraries of onion were produced using the 454 platform, assembled with all previously produced cDNAs, annotated, and submitted to public databases. A total of 4,734 single nucleotide polymorphisms (SNPs) were identified in 1,677 expressed sequences between two inbred onion populations. A random sample of 1.256 of these SNPs was selected as appropriate for genotyping. This research relates to Objective 1, Determine the genetic basis of and initiate selection for carrot, onion, cucumber, and melon quality attributes influencing human nutrition and health, disease resistances, and yield and quality components, and stress tolerance in cucurbits, and perform field performance and quality trials and Objective 2, Utilize current biotechnology to discover and evaluate genetic variation and to map agriculturally important traits in Allium, Cucurbit, and Daucus germplasm, and to develop genetic and breeding stocks.

4. Accomplishments

Last Modified: 10/18/2017
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