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a USDA-ARS, Univ. of Idaho Aberdeen Res. & Ext. Ctr., USDA-ARS Natl. Small Grains Germplasm Res. Facility, 1691 S. 2700 W., Aberdeen, ID 83210
b Univ. of Idaho Tetonia Res. & Ext. Ctr., 888 West Highway 33, Newdale, ID 83436
* Corresponding author (nsgcce{at}ars-grin.gov)
‘Lamont’ hulless-seeded spring oat (Avena sativa L.) (Reg. no. CV-370, PI 595901) was developed cooperatively by the USDA-ARS and the Idaho Agricultural Experiment Station. It was formally released by these agencies in June 2000. Lamont was released as a well-adapted spring oat with high yield potential for producers interested in hulless oat production and marketing in Idaho and other western states.
Lamont was selected from a cross of 79Ab3811/S7884. The hulless parent 79Ab3811 was developed by Agricultural Research Service at the University of Idaho Aberdeen Research and Extension Center from a cross of 69Ab1011/‘Corbit’ (CV-302) (Wesenberg et al., 1982). S7884, a hulled parent, was developed by the University of Saskatchewan at Saskatoon, SK. Lamont originated at Aberdeen, ID, as a F4 head row selection in 1986 and was identified as 86Ab1616 before release. Breeder seed of Lamont originated as a bulk of 17 uniform head rows grown at the Aberdeen Research and Extension Center in 1991, and subsequently grown in large increase plots at the Tetonia Research and Extension Center in 1992.
Lamont is a midseason, spring oat with equilateral panicles, hulless kernels, blue-green foliage, and erect juvenile plant growth. Occasional plants appear that are typically 8 to 13 cm taller than the norm, but otherwise similar in appearance. The taller plants seem to have an abnormally long elongation of the culm between the flag leaf and the base of the panicle.
Lamont was first tested in replicated trials in Idaho in 1988. It has been widely tested in both irrigated and dryland trials in Idaho and other western states since regional testing in the Uniform Northwestern States Oat Nursery was initiated in 1993. It also has been tested in trials in western Canada as well as the Cooperative Naked Oat Test, the latter including several locations in the Midwest, the eastern U.S., and eastern Canada. Lamont has a good yield record in Idaho and other locations in the West, especially compared with other currently available hulless oat cultivars. In 6 station-years of testing in irrigated trials at Aberdeen, ID, in 1993 through 1998, Lamont averaged 6397 kg ha-1 in yield with an average of nearly 93% hulless kernels, resulting in a groat yield of about 6253 kg ha-1. Groat yields for other cultivars in the same trials were 5944 kg ha-1 for ‘Monida’, 5330 kg ha-1 for ‘Ogle’, 5696 kg ha-1 for ‘Paul’, and 3824 kg ha-1 for ‘Pennuda’. Monida and Ogle are hulled cultivars and Paul and Pennuda are hulless cultivars. In 4 station-years of testing in irrigated trials at Tetonia, ID, in 1995 through 1998, Lamont averaged 4620 kg ha-1 and Paul averaged 3677 kg ha-1. In 4 station-years of testing in dryland trials at Tetonia, ID, in 1995 through 1998, Lamont averaged 3634 kg ha-1 in yield and Paul averaged 2570 kg ha-1.
Lamont is similar to the hulless cultivar Paul and the hulled cultivars Monida and Otana in height, averaging 10 cm shorter than Paul, 3 cm shorter than Monida, and 10 cm shorter than Otana in trials at Aberdeen. Lamont has a record of greater lodging resistance than both Otana and Monida in trials at Aberdeen. Lamont is from 2 to 4 d later than Monida in heading. Test weight is a lesser issue in hulless oats relative to hulled cultivars, but, nevertheless, Lamont has very good test weight, averaging nearly 631 kg m-3 in 12 trials under irrigation at Aberdeen in 1993 through 1998. Protein content is influenced by both environment and yield level, with high yield levels typically associated with reduced protein content. Lamont has good groat protein content in trials in southern Idaho, but probably reflecting in part high yields, protein content is intermediate relative to other oat cultivars, averaging 16.6% under irrigation at Aberdeen (seven trials); 17.6% in irrigated trials at Tetonia (four trials); and 18.6% in dryland trials at Tetonia (four trials).
Lamont is expected to compete favorably with existing spring oat cultivars, especially hulless oat cultivars, in dryland environments in Idaho and other western states, with the high yield potential, good shattering resistance, and satisfactory lodging resistance of Lamont being of importance to many growers. Although Lamont is probably too tall for most irrigated environments, it has produced excellent yields with little lodging in short season locations such as Tetonia, ID, under moderate irrigation. Producers should be aware the groats of hulless oat cultivars typically have a high frequency of exposed trichomes or hairs that cause skin irritation during harvest and handling operations. Hulless oat also reportedly have a greater tendency to plug some handling equipment.
Genetic material of this release has been deposited in the USDA-ARS National Plant Germplasm System where it will be available for research purposes, including development and commercialization of new cultivars. Breeder and Foundation seed of Lamont will be maintained by the Idaho Agricultural Experiment Station, Foundation Seed Program. Requests for Breeder and Foundation seed should be directed to the Coordinator, Foundation Seed Program, Kimberly Research and Extension Center, 3793 N 3600 E, Kimberly, ID 83341.
NOTES
Accepted for publication April 30, 2003.
REFERENCES
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