Anitha Chirumamilla, Laurence Charlet, Brent Hulke, R Aiken and Janet Knodel Abstract: Sunflower Helianthus annuus L. is one of the major oil seed crops grown in the USA. with a highest estimated cultivated acreage of 975,000 acres in North Dakota. Besides diseases and weeds, insects are one of the major causes for yield losses. An […]

Anitha Chirumamilla, Laurence Charlet, Brent Hulke, and Janet Knodel Abstract:  Entomology research of the sunflower research unit, USDA-ARS, in Fargo, ND, was discussed in a presentation to a group of producers, industry representatives, and scientists. There are 4 major insect pests for which we have no genetic resistance currently, and the goal of our work

Brent Hulke Abstract: Genetic research of the sunflower research unit, USDA-ARS, in Fargo, ND, was discussed in a presentation to a group of producers, industry representatives, and scientists. The need for sunflower genetic research is ever increasing with more insect and disease problems nationwide. Preliminary data on experimental hybrids to combat these problems was discussed.

Lili Qi, Thomas Gulya Jr., Gerald Seiler, Brent Hulke, Brady Vick Abstract: Sunflower rust, caused by Puccinia helianthi, is a prevalent disease in many countries throughout the world. The U.S. Department of Agriculture (USDA)-Agricultural Research Service, Sunflower Research Unit has released rust resistant breeding materials for several decades. However, constantly coevolving rust populations have formed new

Brent Hulke, Zahirul Talukder, Lili Qi and Thomas Gulya Jr. Abstract: In 2010, we continued the process of backcrossing the head rot QTL from the HA 441 x RHA 439 population into confectionery and elite oilseed backgrounds. Progress is slow due to complexities in scoring of alleles in breeding progenies (dominant markers sometimes in repulsion

Thomas Gulya Jr and Brent Hulke Abstract: The 2010 growing season had abnormally high rainfall in the Red River Valley area of North Dakota and Minnesota, where many of our Sclerotinia nurseries were located. While we have successfully done field evaluations of sunflower for both Sclerotinia head rot and stalk rot for nine years, we

Chao-chien Jan, Lili Qi, Brent Hulke, and Xuelin Fu Abstract: The “doubled haploid” project started in October, 2010, covering four main approaches: anther culture, microspore culture, use of foreign pollen as inducer, and induced mutation. A set of genetically diverse cultivated lines, wild Helianthus accessions and interspecific amphiploids have been established to provide source material

Li Gong, Sam Markell, Brandy Vick, Brent Hulke, Thomas Gulya Jr and Lili Qi Abstract: Sunflower rust (Puccinia helianthi) emerged as a serious disease in the last few years. Confection sunflower is particularly vulnerable to the disease due to the lack of resistance sources. The objectives of this project are to transfer rust resistance genes

James Anderson, E Patrick Fuerst, Trisa Tedrow, Brent Hulke and Ann Kennedy Abstract: Incubation of dormant wild oat (Avena fatua L., isoline M73) caryopses for 1−3 days with Fusarium avenaceum seed-decay isolate F.a.1 induced activity of the plant defense enzyme polyphenol oxidase (PPO). Both extracts and leachates obtained from F.a.1-treated caryopses had decreased abundance of an ∼57 kDa antigenic PPO and increased abundance of antigenic PPOs ranging from ∼52 to 14 kDa, as

J. Glover, J. Reganold, L. Bell, J. Borevitz, E. Brummer, E. Buckler, C. Cox, T. Cox, T. Crews, S. Culman, L. Dehann, D. Eriksson, B. Gill, J. Holland, F. Hu, B. Hulke, A. Ibrahim, W. Jackson, S. Jones, S. Murray, A. Paterson, E. Ploschuk, E. Sacks, S. Snapps, D. Tao, D. Van Tassel, L. Wade,