Brent Hulke, Jerry Miller and Thomas Gulya Jr. Abstract: Sunflower rust (caused by Puccinia helianthi Schwein.) has become a more significant threat to U.S. sunflower (Helianthus annuus L.) production as a result of the multiplicity of races, increasing incidence, and lack of commercial hybrids with resistance. Thus, there is a need for new sources of effective rust resistance […]

Brent Hulke Abstract: Genomics is providing plant breeders with new ways to integrate basic genetic knowledge with conventional breeding protocols to solve important problems. This presentation demonstrated the practical value of SNP (single nucleotide polymorphism) markers to augment traditional breeding programs. Problems that are commonly encountered by sunflower breeders were presented along with a solution

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,

Laurence Charlet, Gerald Seiler, Kathleen Grady, Brent Hulke and Anitha Chirumamilla Abstract: A 6-year field study evaluated 52 sunflower, Helianthus annuus L., accessions, 20 breeding lines, and 9 interspecific crosses for resistance to infestation by naturally occurring populations of the red sunflower seed weevil, Smicronyx fulvus LeConte (Coleoptera: Curculionidae). Germplasm with potential sources of resistance

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 insect resistant lines and experimental hybrids was discussed.

Lili Qi, Thomas Gulya Jr., Brent Hulke and Brady Vick Abstract: Sunflower rust Puccinia helianthi is a serious disease that has been increasingly prevalent in much of the North America sunflower producing region. To effectively control this disease, three independent but complementary projects were initiated in the Sunflower Research Unit. One was evaluation of USDA-released

Laurence Charlet, Robert Aiken, Gerald Seiler, Anitha Chirumamilla, Brent Hulke and Janet Knodel Abstract: A five-year field study evaluated 42 sunflower (Helianthus annuus L.) accessions, 25 breeding lines, and 40 interspecific crosses for resistance to infestation and damage from larval feeding by naturally occurring populations of the sunflower moth, Homoeosoma electellum (Hulst) (Lepidoptera: Pyralidae). Accessions PI 175728 and

Anitha Chirumamilla, Laurence Charlet, Brent Hulke, Gerald Seiler, Theresa Gross, Janet Knodel and Robert Knodel Abstract: Breeding pest-resistance crop cultivars to insects and diseases is one of the primary goals of integrated pest management programs worldwide. Host plant resistance is a tactic that uses the plant’s own defenses to reduce injury from pest attack. Among

Mikey Kantar, Kevin Betts, Bob Stupar, Brent Hulke and Don Wyse Abstract: The objective of this research is to use current genetics and plant breeding techniques to introgress genes for perennial habit from Helianthus tuberosus L. (2n=6x=102) into domesticated sunflower (Helianthus annuus L., 2n=2x=34). H. tuberosus is part of the secondary gene pool of sunflower

Laurence Charlet, Brent Hulke, Anitha Chirumamilla, Gerald Seiler, Kathleen Grady, Robert Aiken and Janet Knodel Abstract: In the central and northern Plains, cultivated sunflower (Helianthus annuus L.) is attacked by a number of insect pests resulting in yield losses for sunflower producers. Host-plant resistance can provide a long-term solution to managing these insects with reduced