Location: Plant Genetics Research
Project Number: 5070-21000-036-10-R
Project Type: Reimbursable
Start Date: Oct 1, 2013
End Date: Dec 31, 2016
The overall objective of this project is to carry out collaborative team research to determine the viability of the high stearic acid trait in soybean seed oil. The team will determine which genes in combination with mutant alleles of the soybean SACPD-C gene will create a stable oil profile with greater than 20% stearic acid and less than 3% linolenic acid. The PI will develop new sources of the high stearic acid trait through a mutagenesis approach. Cooperators will discover the genetic basis for the high stearic acid trait in current soybean germplasm. The team will coordinate the development of molecular marker resources, share soybean germplasm, and determine the stability and any associated yield drag of the trait across different environments. The cooperators will independently incorporate low linolenic acid alleles into soybean lines with the high stearic acid trait.
The overall approach relies on molecular genetic and genomic analyses of existing soybean lines containing the high stearic acid trait, development of molecular marker resources to support trait introgression into elite soybean germplasm for trait stability experiments, and breeding efforts to determine impacts on yield for the trait. In addition, new sources of the trait will be identified through mutagenesis experiments on soybean lines with an existing elevated stearic acid phenotype. Soybean breeding efforts will focus on moving the high stearic acid trait between maturity groups and incorporating mutant alleles of the FAD3 genes to combine the trait with the low linolenic acid trait. Finally, soybean germplasm containing the high stearic acid trait will be combined with the high oleic acid trait to evaluate novel fatty acid profiles for soybean oil.