Summit 515 is a hard red spring wheat. It was developed by Syngenta Cereals (formerly Resource Seeds, Inc.) and released in 2011. Stripe rust resistance genes Yr5 and Yr15 were introduced by four backcross generations into the susceptible cultivar Summit and then combined using marker assisted selection at UC Davis (project supported by Research Seeds Inc.). Research Seed Inc. selected the best lines among BC4F2 lines homozygous for the two genes. This cultivar is very similar to the original Summit but is resistant to prevalent races of the stripe rust pathogen present in California. It has medium early maturity and good straw strength. It is resistant to stripe rust and leaf rust, moderately susceptible to BYD, and susceptible to Septoria tritici leaf blotch and powdery mildew. It was evaluated as Entry 1658 in the UC Regional Cereal Testing program from 2010-present for

Late Fall Planting

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Particularly suited for:
Central Valley and surrounding areas
South Central Coast
Southern Desert Region

*Lab data below is an average from 2020 harvest