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United States Department of Agriculture

Agricultural Research Service

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Location: Tropical Crops and Germplasm Research

2011 Annual Report

1a. Objectives (from AD-416)
Develop new soybean varieties with high yield and disease resistance.

1b. Approach (from AD-416)
Soybean accessions will be planted during the winter months in Isabela, Puerto Rico for seed increase. Seed will be harvested, threshed, cleaned and shipped back by overnight delivery to the cooperator.

3. Progress Report
The objectives of the agreement correspond with objective 2 of the parent project: Regenerate NPGS accessions with few seeds, low viabilities, and adaptations to equatorial latitudes and long seasons, emphasizing Sorghum, Zea, Vigna, Cucurbita, Leucaena, and Psophocarpus. The first generation (F1) of seeds from cross pollinations was grown for seed increase. The cross pollinations were made with the following breeding objectives: yield increase, increase protein and oil in seeds, improve the fatty acid composition of seed oil, increase drought tolerance, increase genetic diversity, and decrease the phytic acid content of soybeans. In addition to these materials, breeding populations for the aforementioned traits were advanced an additional generation. Materials with cultivar potential were grown to increase seeds so that they could be yield tested in multiple environments during the summer season. Seventeen populations with potential quantitative trait loci (QTL) for protein were advanced another generation. These materials will be used to determine marker associations between protein and QTLs. For the oil quality research, single plants were harvested and screened for increased oleic and stearic acid content and decreased palmitic acid content. Between 25 and 60 lines of four populations were increased to test the hypothesis that F2 heterosis can be used to determine which cross has the most potential to produce high yielding progeny. Eleven vegetable soybean (edamame) breeding lines that have potential for commercial production were grown for seed increase.

4. Accomplishments

Last Modified: 10/19/2017
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