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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 #110991
Title: REGISTRATION OF THREE RUST RESISTANT SUNFLOWER GERMPLASM POPULATIONS

Author
item Miller, Jerry
item Gulya Jr, Thomas

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/1/2001
Publication Date: N/A
Citation: N/A

Interpretive Summary: Three rust resistant sunflower germplasm populations were developed and released by the USDA-ARS, Fargo, ND, and the North Dakota Agricultural Experiment Station, Fargo, ND. HA-R6 is a confection maintainer population, HA-R7 is a confection restorer population, and HA-R8 is an oilseed restorer population, released in 1997. These three populations are resistant to rust race 777. Race 777 is the most virulent North American race, infecting all nine standard rust differentials. Plants of the HA-R6, HA-R7, and HA-R8 germplasm populations had an immune reaction to race 777. The resistance in HA-R6 and HA-R7 was derived from Ames 3234 accession from France named 6 SC U6 L6. The resistance in HA-R8 was derived from PI 432512, a plant introduction collected from the Havasupai Indian Reservation, Supai Village, Grand Canyon, Coconino Co., Arizona. These sources should afford sunflower breeders an opportunity to incorporate effective rust resistance into confection and oilseed parental lines and thus facilitate the development of rust resistant hybrids for producers of sunflower in the U.S.

Technical Abstract: Three rust resistant sunflower (Helianthus annuus L.) germplasm populations were developed and released by the USDA-ARS, Fargo, ND, and the North Dakota Agricultural Experiment Station, Fargo, ND. HA-R6 is a confection maintainer population, HA-R7 is a confection restorer population, and HA-R8 is an oilseed restorer population, released in 1997. These three populations are resistant to rust race 777. Race 777 is the most virulent North American race, infecting all nine standard rust differentials. Plants of the HA-R6, HA-R7, and HA-R8 germplasm populations had an immune reaction to race 777. The resistance in HA-R6 and HA-R7 was derived from Ames 3234 accession from France named 6 SC U6 L6. The resistance in HA-R8 was derived from PI 432512, a plant introduction collected from the Havasupai Indian Reservation, Supai Village, Grand Canyon, Coconino Co., Arizona. These sources should afford sunflower breeders an opportunity to incorporate effective rust resistance into confection and oilseed parental lines and thus facilitate the development of rust resistant hybrids for producers of sunflower in the U.S.