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United States Department of Agriculture

Agricultural Research Service

Title: Registration of Two Restorer (Rha 439 and Rha 440) and One Maintainer Ha 441) Sclerotinia Tolerant Oilseed Sunflower Germplams

Authors
item Miller, Jerry
item Gulya, Thomas
item Vick, Brady

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: June 30, 2005
Publication Date: January 1, 2006
Citation: Miller, J.F., Gulya Jr, T.J., Vick, B.A. 2006. Registration of two restorer (RHA 439 and RHA 440) and one maintainer (HA 441) Sclerotinia tolerant oilseed sunflower germplams. Crop Science. 46:482-483.

Interpretive Summary: Two restorer (RHA 439 and RHA 440) and one maintainer (HA 441) oilseed sunflower germplasm lines were developed cooperatively and released by the USDA-ARS, Fargo, ND, and the North Dakota Agricultural Experiment Station, Fargo, ND. These germplasms are available for use by industry and public researchers to create hybrids, parental lines, or germplasms with improved Sclerotinia head rot resistance. RHA 439 and RHA 440 were derived from crosses between a high yielding, high oil content line developed by USDA and lines derived from France and entered into the Food and Agriculture Organization (FAO) Hybrid Sunflower Yield Trial. HA 441 was derived from a cross between a high yielding, high oil content line developed by USDA and a breeding line developed by INRA, Clermont-Ferrand, France. Sclerotinia tolerance of these lines was evaluated by planting testcross hybrids that were artificially inoculated and placed under a mist irrigation system. The inoculation and mist irrigation was funded through the Sclerotinia Initiative. These lines provide increased genetic diversity to sunflower industry and public improvement programs.

Technical Abstract: Two restorer (RHA 439 and RHA 440) and one maintainer (HA 441) oilseed sunflower (Helianthus annuus L.) germplasm lines were developed cooperatively and released by the USDA-ARS, Fargo, ND, and the North Dakota Agricultural Experiment Station, Fargo, ND. These germplasms are available for use by industry and public researchers to create hybrids, parental lines, or germplasms with improved sclerotinia [caused by Sclerotinia sclerotiorum (Lib.) de Bary] head rot resistance. RHA 439 and RHA 440 were derived from crosses between a high yielding, high oil content line developed by USDA and lines derived from France and entered into the Food and Agriculture Organization (FAO) Hybrid Sunflower Yield Trial (RHA 377/AS 3211; RHA 377/AS 4379). HA 441 was derived from a cross between a high yielding, high oil content line developed by USDA and a breeding line developed by INRA, Clermont-Ferrand, France (HA 412/SD). Sclerotinia tolerance of these lines was evaluated by planting testcross hybrids that were artificially inoculated and placed under a mist irrigation system. The inoculation and mist irrigation was funded through the Sclerotinia Initiative. These lines provide increased genetic diversity to sunflower industry and public improvement programs.

Last Modified: 9/20/2014
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