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United States Department of Agriculture

Agricultural Research Service

Title: Registration of 'cache' Meadow Bromegrass Cultivar

Authors
item Jensen, Kevin
item Waldron, Blair
item Larson, Steven
item Peel, Michael

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: April 30, 2004
Publication Date: November 2, 2004
Citation: Jensen, K.B., Waldron, B.L., Larson, S.R., Peel, M. 2004. Registration of 'Cache' meadow bromegrass cultivar. Crop Science 44:2263-2264.

Interpretive Summary: Cache meadow bromegrass cultivar is recommended for use on irrigated and semi-irrigated pastures for forage production. Cache was developed from selections within the cultivars Regar, Fleet, Paddock. The objective was to increase forage production in this cultivar. This cultivar was selected for increased forage yield, total seed yield, 100-seed weight, and seedling emergence from a 7.6 cm planting depth. When evaluated at six locations across Montana, Nebraska, North Dakota, and Utah and three years, Cache meadow bromegrass produced significantly more dry matter forage than cultivars Regar and Fleet meadow bromegrass, Paiute orchardgrass, and Manchar smooth bromegrass. Under limited irrigation, Cache meadow bromegrass produced signifciantly more dry matter than the cultiars Fleet and Regar. Across locations, Cache meadow bromegrass was similar to Regar in establishment and persistence, but significantly better than Fleet.

Technical Abstract: 'Cache' meadow bromegrass cultivar [Bromus riparius Rehm.] is recommended for use on irrigated and semi-irrigated pastures for forage prduction. The parental germplasm for Cache was derived from selections within PI 578532 ('Regar'; 20.9%), PI 536012 ('Fleet'; 54.1%), and PI 536013 ('Paddock'; 25%). This cultivar is the result of two cycles of recurrent selection for increased forage yield, total seed yield, 100-seed weight, and seedling emergence from a 7.6 cm planting depth. Morphologically, Cache is significantly taller, with longer flag leaves that are oriented higher on the culm than the cultivar Fleet. Cache meadow bromegrass has a chromosome number of 2n=10x=70, which is the same as Regar, Fleet, and Paddock. Based on amplified fragment length polymorphism profiles, Cache meadow bromegrass displayed a relatively large number of DNA fragments comparable to meadow bromegrass cultivars Fleet, Paddock, Montana, and MacBeth. Under a line-source study, with irrigation rates that ranged from 10.1 to 36.8 mm per week, Cache meadow bromegrass produced significantly more dry matter than the cultivar Fleet at all irrigation rates and significantly more dry matter than the cultivar Regar at the two lowest irrigation rates. Under repeated defoliation Cache meadow bromegrass yielded significantly more total dry matter than orchardgrass (Dactylis glomerata L.) cultivars Ambassador and Latar on an irrigated site in northern Utah. When combined across six locations and three years in the Northern Plains Regional Trials (NPA), Cache meadow bromegrass produced significantly more dry matter forage than cultivars Regar and Fleet meadow bromegrass, Paiute orchardgrass, and Manchar smooth bromegrass (Bromus inermis L.). Across locations, Cache meadow bromegrass was similar to Regar in establishment and persistence, but significantly better than Fleet.

Last Modified: 10/23/2014
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