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ARS Home » Plains Area » Fargo, North Dakota » Edward T. Schafer Agricultural Research Center » Sunflower and Plant Biology Research » Research » Publications at this Location » Publication #402895
Research Project: Genetic Enhancement of Sunflower Yield and Tolerance to Biotic Stress

Location: Sunflower and Plant Biology Research

Title: Registration of HA-DM15 and HA-DM16 oilseed sunflower germplasms with resistance to sunflower downy mildew

Author
item Qi, Lili
item Seiler, Gerald

Submitted to: Journal of Plant Registrations
Publication Type: Germplasm Registration
Publication Acceptance Date: 6/26/2023
Publication Date: 9/28/2023
Citation: Qi, L., Seiler, G.J. 2023. Registration of HA-DM15 and HA-DM16 oilseed sunflower germplasms with resistance to sunflower downy mildew. Journal of Plant Registrations. https://doi.org/10.1002/plr2.20325.
DOI: https://doi.org/10.1002/plr2.20325

Interpretive Summary:

Technical Abstract: Sunflower oil is one of the healthier vegetable oils with relatively high levels of vitamin E, the highest concentrations of polyunsaturated fat, and low in saturated fat. Sunflower production ranks third in global oilseed production in 2021. Downy mildew (DM), caused by the oomycete pathogen Plasmopara halstedii (Farl.) Berl. et de Toni, is a major constraint for worldwide sunflower production causing significant yield losses in susceptible hybrids. The search for new sources of resistance to DM is the primary objective of all sunflower breeding programs. Germplasm lines HA-DM15 (Reg. No. ______, PI 702359) and HA-DM16 (Reg. No. ______, PI 702360) were developed by introgressing two new DM resistance genes, Pl37 and Pl38 from the wild sunflower species Helianthus annuus and H. praecox into oilseed sunflower, respectively. The BC1F3-derived HA-DM15 harboring the Pl37 gene was selected from the cross of HA 89//NMS HA 89/wild H. annuus PI 435417. The germplasm line HA-DM16 carrying the Pl38 gene is an improved oilseed derivative of Rf PRA-417 with DM resistance originally derived from the wild H. praecox PRA-417 from the cross of CMS HA89*2/wild H. praecox PRA-417. HA-DM15/Pl37 and HA-DM16/Pl38 are immue to the most predominant and virulent DM races idenfied in North America and Europe. Pl37 and Pl38 have been genetically mapped to sunflower chromosomes 4 and 2, respectively, with SNP markers linked to the both genes facilitating their transfer to elite sunflower lines by marker-assisted selection, providing new and diverse sources for sunflower DM-resistance breeding.