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Title: Registration of STARS 0601W wheat germplasm

Author
item PORTER, DAVID
item BAKER, CHERYL
item CARVER, BRETT - OKLAHOMA STATE UNIV
item MARAIS, G - STELLENBOUSH UNIV., SAFRI

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/7/2007
Publication Date: 9/1/2007
Citation: Porter, D.R., Baker, C.A., Carver, B.F., Marais, G.F. 2007. Registration of STARS 0601W wheat germplasm. Journal of Plant Registrations. 1(2):170-171.

Interpretive Summary: No interpretive summary required - germplasm release.

Technical Abstract: STARS 0601W (PI 643399) is a hard red winter wheat (Triticum aestivum L.) germplasm developed cooperatively by the Wheat, Peanut and Other Field Crops Research Unit, USDA-Agricultural Research Service, Stillwater, Oklahoma, and the Oklahoma Agricultural Experiment Station. STARS 0601W is resistant to biotypes 1 and 2 of the Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko). STARS 0601W was experimentally tested as OK03825, and originated from the cross, 'Custer'*3/94M81. STARS 0601W is resistant to RWA biotypes 1 and 2 when seedling plants are tested with greenhouse-reared colonies of biotype-verified aphids. Seedling reactions to RWA biotypes 1 and 2 feeding are characterized as resistant (scores of 1 and 2, respectively) on a damage rating scale of 1 (no damage) to 9 (dead plant). The South African wheat selection, 94M81, is the source of RWA resistance in STARS 0601W. 94M81 was derived from the line 93M45-14, which is reported to contain a 1BL.1RS wheat-rye translocation developed through an intergeneric transfer from 'Turkey 77' rye (Secale cereale L.) to 'Veery' wheat. Resistance to RWA biotype 2 is reported to be conferred by a single dominant gene, designated Dn7, located on 1RS of the 1BL.1RS wheat-rye translocation. STARS 0601W is expected to be homogeneous for RWA reaction. In 2004, single plants of OK03825 were infested with a combination of RWA biotypes 1 and 2, plants with damage ratings of 1 to 2 were selected and increased in the greenhouse in 2005. Three single-plant progenies were increased at Yuma, AZ, in 2006. STARS 0601W traces to one of those progenies and is a BC2F5-derived line currently in the F7 generation. STARS 0601W is an awned, white-chaff, medium height, semidwarf wheat with medium-early maturity, heading about 2 days before 'Ok101.' It is expected to reach the same plant height as Ok101, or slightly shorter than 'TAM 111.' STARS 0601W is susceptible to leaf rust (Puccinia triticina Eriks.) in the seedling stage and to wheat soilborne mosaic virus. Grain quality of STARS 0601W was assessed by OSU’s Wheat Quality Laboratory in 2003 and 2004. Protein levels varied from 122 to 134 g kg-1, equal to 9 g kg-1 higher than TAM 110 (2003) and 15 g kg-1 higher than Ok101 (2004), respectively. Based on single-kernel characterization system analysis from five sites, STARS 0601W has large kernels (38.6 g thousand-kernel weight and 2.7 mm kernel diameter) with intermediate hardness (hardness index of 51). Mixing time is moderately short (3.4 min) and mixing tolerance is intermediate (score of 3.6 on a 1-to-10 scale).