Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/18/2004
Publication Date: 5/1/2004
Citation: Rudd, J.C., Lazar, M.A., Worrall, D.W., Marshall, D.S., Sutton, R.L. 2004. Registration of tam 112 wheat. Crop Science.
Interpretive Summary: TAM 112 is a new, hard red winter wheat variety that has adaptation to the low-rainfall areas of the southern and central Great Plains of the U.S. TAM 112 has superior grain and forage production than any other hard wheat adapted to these regions.
Technical Abstract: TAM 112 is a hard red winter what (Triticum aestivum) experimental line developed by the Texas Agricultural Experiment Station (TAES). It is an F4 derived line from the cross U1254-7-9-2-1/TXGH10440. David Worrall, TAES Vernon, made the cross during the winter of 1991-92. U1254-7-9-2 is a USDA-ARS germplasm line from the Plant Science and Entomology Research unit, Manhattan, Kansas. It was developed from the cross TAM 200/TA2460. TA2460 is an Aegilops tascuhii (one of the progenitor species of modern hexaploid wheat) lines that was identified as having a unique gene for leaf rust resistance (this gene has since been designated lr41). TXGH10440 was a selection from the same population that TAM 110 was selected from. TXGH10440 carries gb2 gene for greenbug resistance from the germplasm line Amigo and gb3 from the synthetic hexaploid line named Largo. The F3 and F4 generations were grown as bulk populations on the TAES farm at Chillicothe in 1995 (year of harvest) and 1996, respectively. Random heads were harvested from the F4 population and were planted as head-rows at Chillicothe in the fall of 1996. The line that became TAM 112 was visually selected for its agronomic characteristics and was grown as a single plot in 1998 and in replicated trials thereafter. The selection criteria were forage potential and grain yield. It was tested in Texas Elite trials (NTE, WTE, TXE) 2002-2003, Southern Regional Performance Nursery (SRPN) 2003-2003, and the Texas Uniform Variety Trial (UVT) in 2004. A head-row purification was conducted in 2003. One hundred-fifty rows were visually evaluated and harvested for uniformity. After harvest, 10 seed each from these 135 lines were evaluated for resistance to biotype E greenbug. Based on purity for resistance, the seed from 133 of these lines were bulked. Three acres of the purified TAM 112 was planted by Texas Foundation Seed Service in the fall of 2003 to produce Breeders seed. Foundation seed will be produced during the 2004-2005 season.