|Mornhinweg, Dolores - Do|
Submitted to: Crop Science
Publication Type: Germplasm Release
Publication Acceptance Date: 5/1/2004
Publication Date: 10/1/2004
Citation: Mornhinweg, D.W., Edwards, L.H., Smith, E.L., Morgan, G.H., Webster, J.A., Porter, D.R., Carver, B.F. 2004. Registration of 'Post 90' barley. Crop Science. 44:2263.
Interpretive Summary: Germplasm registration article.
Technical Abstract: 'Post 90' is a winter feed barley developed cooperatively by the Oklahoma Agricultural Experiment Station and the USDA-ARS, and released 1991. Post 90 is a composite of greenbug (Schizaphis graminum Rond.) resistant plant selections from the variety 'Post.' Post, released by the Oklahoma Agricultural Experiment Station in 1977, is a high yield, widely adapted, winter feed barley reported to be resistant to greenbug biotypes B, C, and E. Post, used extensively in greenbug biotyping studies was found to be heterogeneous for greenbug resistance. Post 90 is a composite of 105 plant selection progenies from the variety Post that were homozygous for greenbug resistance to biotype C. Post 90 is a short-strawed, 6-rowed, rough-awned barley with mid- to late-season maturity. Early plant growth is semi-prostrate when fall-seeded and spikes are dense. Post 90 is 2.5 cm shorter in stature than Post and exhibits good straw quality and winter hardiness. Post 90 is adapted statewide in Oklahoma and also to some environments in the western, northwestern, eastern, and northeastern United States. It has been evaluated in replicated performance trials since 1983, both in Oklahoma and in the Uniform Winter Barley Nursery, at 17 locations across the barley growing areas of the U.S. and Canada. Average yields (22 station years) are 3961 kgha-1 for Post 90 and 3972 kgha-1 for Post. Post 90 is more homogeneous for greenbug resistance, height, spike size and maturity than Post.