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Browsing by Author "Wiersma, J.V."

Now showing 1 - 4 of 4
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    Registration of ‘Quest’ spring malting barley with improved resistance to Fusarium head blight
    (Journal of Plant Registrations, 2013-01-25) Steffenson, Brian; Smith, K.P.; Budde, A.; Dill-Macky, R.; Rasmusson, D.C.; Schiefelbein, E.; Wiersma, J.J.; Wiersma, J.V.; Zhang, B.
    ‘Quest’ (Reg No. CV-348, PI 663183) is a spring, six-rowed, malting barley (Hordeum vulgare L.) released by the Minnesota Agricultural Experiment Station in January 2010 on the basis of its improved resistance to Fusarium head blight [FHB; caused by Fusarium graminearum Schwabe; teleomorph Gibberella zeae (Schwein) Petch]. Quest was developed over three breeding cycles of selection for yield, malting quality, and FHB resistance. Disease resistance traces to the Midwest cultivar MNBrite and the two-rowed accession from China Zhedar1. Quest has about half the level of disease and about 40% less of the associated mycotoxin, deoxynivalenol, compared to the historically important cultivar in the region ‘Robust’. Quest is similar in yield to the current dominant varieties in the region and was approved as a malting variety by the American Malting Barley Association.
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    Registration of ‘Rasmusson’ barley
    (Journal of Plant Registrations, 2010-09) Steffenson, Brian; Smith, K.P.; Rasmusson, D.C.; Schiefelbein, E.; Wiersma, J.J.; Wiersma, J.V.; Budde, A.; Dill-Macky, R.
    ‘Rasmusson’ (Reg. No. CV-345, PI 658495) is a spring, six-rowed, malting barley (Hordeum vulgare L.) released by the Minnesota Agricultural Experiment Station in January 2008. It was named after Donald Rasmusson, who worked as a barley breeder at the University of Minnesota from 1958 to 2000. Rasmusson has the pedigree M95/‘Lacey’ and is the product of advanced cycle breeding derived from crosses among elite breeding lines within the University of Minnesota breeding program. Rasmusson was released based on its superior yield performance across the Upper Midwest of the United States and surrounding regions in Canada and favorable malting quality, in particular, high malt extract. Rasmusson is resistant to spot blotch [caused by Cochliobolus sativus (Ito and Kuribayashi) Drechs. ex Dastur] and the prevalent races of stem rust (caused by Puccinia graminis Pers.: Pers. f. sp. tritici Erikss. & E. Henn).
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    Sunflower Monoculture and Crop Rotation
    (Minnesota Agricultural Experiment Station, 1979) Robinson, R.G.; Smith, L.J.; Wiersma, J.V.
    Crop rotations of 4 to 6 years have been commonly recommended for sunflower. Some authorities suggest shorter rotations when disease-resistant hybrids are used. Many sunflower producers use a 3-year rotation, some use a 2-year rotation, and some are considering monoculture. Monoculture is the antithesis of crop rotation. It consists of growing the same species of crop for two or more years on the same field. Crop rotation is a recurring succession of crops on the same field. Rotations vary in length from 2 to 6 years or longer. The shortest rotation, 2 years, is called crop alternation. Crop rotation provides diversification of risk and labor for the individual farmer. Farmers often change rotations or crop sequence in the rotation to meet federal farm program requirements or in response to anticipated changes in prices of crops. The objective of a good crop rotation or sequence for sunflower is weed, insect, and disease control.
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    Sunflower Planting Date: An Important Decision
    (Minnesota Agricultural Experiment Station, 1985) Robinson, R.G.; Rabas, D.L.; Wiersma, J.V.; Warnes, D.D.
    Sunflower production involves a series of decisions, and one of the most controversial is optimum date of planting. Planting date affects not only sunflower growth, but it also affects the severity of damage from insects and fungi that feed on sunflower. Planting date recommendations vary among specialists. Consequently, recommendations are often generalized to include a 1- to 2-month period in the northern states. The sunflower varieties and hybrids grown on Minnesota farms do not usually require the entire growing season, so planting dates range from late April to early July. Research plot data in this report show the effect of date of planting on sunflower growth, seed yield, seed quality, and oil quality. The effect of date of planting on severity of damage from sunflower pests is also discussed. Date-of-planting trials were conducted from 1967 through 1969 with Peredovik, Armavirec, and Krasnodarets oilseed varieties and Arrowhead, Mingren, and 66 VI nonoilseed varieties at Rosemount and Grand Rapids. USDA 894 hybrid was used from 1982 through 1984 at Grand Rapids, Crookston, and Morris. Trials were located on sandy soil at Grand Rapids and on silt loam soil at the other locations.