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United States Department of Agriculture

Agricultural Research Service

Research Project: SUNFLOWER GERMPLASM DIVERSIFICATION AND CHARACTERIZATION UTILIZING WILD SUNFLOWER SPECIES, CYTOGENETICS, AND APPLIED GENOMICS Title: Registration of a male fertility restorer oilseed sunflower germplasm HA-R9 resistant to sunflower rust

Authors
item Qi, Lili
item Seiler, Gerald

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: April 5, 2013
Publication Date: July 8, 2013
Citation: Qi, L., Seiler, G.J. 2013. Registration of a male fertility restorer oilseed sunflower germplasm, HA-R9, resistant to sunflower rust. Journal of Plant Registrations. 7(3):353-357.

Interpretive Summary: Sunflower rust (caused by Puccinia helianthi Schwein.) is a disease of sunflower which has been identified in all major sunflower growing areas of the world. The appearance of new virulent rust races, such as North American (NA) race 777, and recent changes in the rust population have threatened sunflower production in the Northern Great Plains of the United States, where approximately 85% of the sunflowers are grown. The sunflower germplasm HA-R9 (PI 667595) was developed by the USDA-ARS, Sunflower and Plant Biology Research Unit in collaboration with the Agricultural Experiment Station of North Dakota State University and released in January, 2013. The rust resistance in HA-R9 originated from wild H. annuus PI 613748. Rust evaluation was conducted at the seedling stage under greenhouse conditions. HA-R9 has resistance to all rust races tested so far, including the most predominant and the most virulent races currently identified in the United States. The rust resistance in HA-R9 is conditioned by a single dominant gene R11 which has been mapped to linkage group 13 of sunflower and is closely linked to the Rf5 male fertility restore gene present in HA-R9 in the coupling phase. Germplasm HA-R9 will fill an urgent need for resistance to new virulent rust races and diversify the pool of fertility restoration genes in sunflower.

Technical Abstract: The sunflower (Helianthus annuus L.) germplasm HA-R9 (Reg. No.xxx, PI 667595) was developed by the USDA-ARS, Sunflower and Plant Biology Research Unit in collaboration with the Agricultural Experiment Station of North Dakota State University and released in January, 2013. Sunflower rust (caused by Puccinia helianthi Schwein.) is a worldwide disease of sunflower that is an increasing threat to North America production due to newly emerged virulent races. HA-R9 was selected from an oilseed male fertility restore line, Rf ANN-1742 (PI 596476), which was released by the USDA-ARS and the Agricultural Experiment Station of North Dakota State University in 1997. The rust resistance in HA-R9 originated from wild H. annuus PI 613748. Rust evaluation was conducted at the seedling stage under greenhouse conditions. HA-R9 has resistance to all rust races tested so far, including the most predominant and the most virulent races currently identified in the United States. The rust resistance in HA-R9 is conditioned by a single dominant gene R11 which has been mapped to linkage group 13 of sunflower and is closely linked to the Rf5 male fertility restore gene present in HA-R9 in the coupling phase. Germplasm HA-R9 will fill an urgent need for resistance to new virulent rust races and diversify the pool of fertility restoration genes in sunflower.

Last Modified: 10/22/2014
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