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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 #197417
Title: REGISTRATION OF TWO MAINTAINER (HA 451 AND HA 452) AND THREE RESTORER (RHA 453 TO RHA 455) SCLEROTINIA-TOLERANT OILSEED SUNFLOWER GERMPLASMS

Author
item Miller, Jerry
item Gulya Jr, Thomas
item Vick, Brady

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/29/2006
Publication Date: 11/1/2006
Citation: Miller, J.F., Gulya Jr, T.J., Vick, B.A. 2006. Registration of two maintainer (HA 451 and HA 452) and three restorer (RHA 453-RHA 455) Sclerotinia-tolerant oilseed sunflower germplasms. Crop Science. 46:2727-2728.

Interpretive Summary: Two maintainer (HA 451 and HA 452) and three restorer (RHA 453 to RHA 455) Sclerotinia-tolerant oilseed sunflower germplasms were developed and released by the USDA-ARS, Fargo, ND, and the North Dakota Agricultural Experiment Station, Fargo, ND. These germplasms have been selected for their tolerance to Sclerotinia head and stalk rot, a major sunflower disease and provide diversity for agronomic characteristics and oil quality. HA 451 is an F6-derived F7 maintainer line advanced by pedigree selection from the cross HA 411/Fuksinka 10. Fuksinka is an introduction from Russia. HA 452 is an F6-derived F7 maintainer line advanced by pedigree selection from the cross HA 335/HA 412. HA 452 has downy mildew resistance to all known North American races. RHA 453 is an F6-derived F7 fertility restorer germplasm line advanced by pedigree selection from the cross RHA 344/Inedi. RHA 454 is an F6-derived F7 fertility restorer germplasm line advanced by pedigree selection from the cross RHA 447//RHA 440/PSC 8. Inedi and PSC 8 are introductions obtained from the INRA program, Clermont-Ferrand, France. RHA 455 is an F6-derived F7 fertility restorer germplasm line advanced by pedigree selection from the cross RHA 440/HO IS R-line. RHA 453 to RHA 455 have high-oleic fatty acid which can be utilized to produce NuSun® sunflower hybrids. Sclerotinia head rot tolerance of these lines was evaluated through the use of testcross hybrids that were artificially inoculated under mist irrigation in 2003 and 2004 at the Carrington ND Research and Extension Center. Percent infection of HA 451, HA 452, RHA 453, RHA 454, and RHA 455 in testcross hybrids was 12.5%, 23.9%, 22.0%, 23.0%, and 8.2%, respectively, compared to the resistant check hybrid NK 278 with 24.9%, and the susceptible check hybrid SF 270 with 73.2% infection. These germplasms are available for use by industry and public researchers to create hybrids, parental lines, or germplasm with increased tolerance to Sclerotinia head and stalk rot.

Technical Abstract: Two maintainer (HA 451 and HA 452) and three restorer (RHA 453 to RHA 455) Sclerotinia-tolerant oilseed sunflower (Helianthus annuus L.)germplasms were developed and released by the USDA-ARS, Fargo, ND, and the North Dakota Agricultural Experiment Station, Fargo, ND. These germplasms have been selected for their tolerance to Sclerotinia head and stalk rot [caused by Sclerotinia sclerotiorum (Lib.) de Bary], a major sunflower disease and provide diversity for agronomic characteristics and oil quality. HA 451 is an F6-derived F7 maintainer line advanced by pedigree selection from the cross HA 411/Fuksinka 10. HA 452 is an F6-derived F7 maintainer line advanced by pedigree selection from the cross HA 335/HA 412. RHA 453 is an F6-derived F7 fertility restorer germplasm line advanced by pedigree selection from the cross RHA 344/Inedi. RHA 454 is an F6-derived F7 fertility restorer germplasm line advanced by pedigree selection from the cross RHA 447//RHA 440/PSC 8. RHA 455 is an F6-derived F7 fertility restorer germplasm line advanced by pedigree selection from the cross RHA 440/HO IS R-line. Sclerotinia head rot tolerance of these lines was evaluated through the use of testcross hybrids that were artificially inoculated under mist irrigation in 2003 and 2004 at the Carrington ND Research and Extension Center. Percent infection of HA 451, HA 452, RHA 453, RHA 454, and RHA 455 in testcross hybrids was 12.5%, 23.9%, 22.0%, 23.0%, and 8.2%, respectively, compared to the resistant check hybrid NK 278 with 24.9%, and the susceptible check hybrid SF 270 with 73.2% infection. These germplasms are available for use by industry and public researchers to create hybrids, parental lines, or germplasm with increased tolerance to Sclerotinia head and stalk rot.