peer-reviewed journal publication

Jarrod Prasifka, Brent Hulke, Gerald Seiler Abstract: Sunflower pericarps provide a barrier against seed-feeding by larvae of the sunflower moth, Homoeosoma electellum. Pericarp hardening is thought to be accelerated by a phytomelanin layer beneath the hypodermis, but among germplasm with phytomelanin, broad variation in sunflower pericarp strength exists. To facilitate the use of pericarp strength […]

Zahirul Talukder, Brent Hulke, Laura Marek, Thomas Gulya Jr Abstract: Basal stalk rot (BSR) and head rot (HR) caused by Sclerotinia sclerotiorum (Lib.) de Bary are traditionally major diseases of sunflower (Helianthus annuus L.) in the United States, while Phomopsis stem canker (PSC) caused by Phomopsis helianthi Munt.-Cvet. et al. has become increasingly damaging in recent years. Host resistance is

Anitha Chirumamilla, Janet Knodel, Laurence Charlet, Brent Hulke, Stephan Foster, Paul Ode Abstract: Banded sunflower moth, Cochylis hospes Walsingham, is one of the most destructive seed-feeding insect pests of sunflowers, causing significant economic yield losses in the northern Great Plains. In an attempt to understand host-plant resistance mechanisms for this pest, we field tested over

Michael B. Kantar Kevin Betts, Jean-Michel Michno, James J. Luby, Peter L. Morrell, Brent S. Hulke, Robert M. Stupar, Donald L.Wyse Abstract: Perennial crops show promise for sustainable agricultural production while providing ecosystem services (maintaining healthy soil, controlling erosion, improving water quality, and enhancing wildlife habitat). Perennial crops could also provide economically viable cropping option

Thomas Pearson, Jarrad Prasifka, Daniel Brabec, Ronald Haff, Brent Hulke Abstract: The development of insect-resistant sunflowers is hindered by the lack of a quick and effective method for scoring samples in terms of insect damage. The current method for scoring insect damage, which involves manual inspection of seeds for holes bored into the shell, is

Zahirul I. Talukder, Brent S. Hulke, Lili Qi, Brian E. Scheffler, Venkatramana Pegadaraju, Kevin McPhee and Thomas J. Gulya  Abstract: Sclerotinia stalk rot, caused by Sclerotinia sclerotiorum, is one of the most destructive diseases of sunflower (Helianthus annuus L.) worldwide. Markers for genes controlling resistance to S. sclerotiorum will enable efficient marker-assisted selection (MAS). We sequenced eight candidate genes homologous to Arabidopsis thaliana defense genes known to be

Venkatramana Pegadaraju, Rick Nipper, Brent Hulke, Lili Qi and Quentin Schultz  Abstract: Application of Single Nucleotide Polymorphism (SNP) marker technology as a tool in sunflower breeding programs offers enormous potential to improve sunflower genetics, and facilitate faster release of sunflower hybrids to the market place. Through a National Sunflower Association (NSA) funded initiative, we report on the process of SNP

Li Gong, Brent Hulke, Thomas Gulya, Sam Markell and Lili Qi  Abstract: Sunflower production in North America has recently suffered economic losses in yield and seed quality from sunflower rust (Puccinia helianthi Schwein.) because of the increasing incidence and lack of resistance to new rust races. RHA 464, a newly released sunflower male fertility restorer line, is resistant to both of

L. Gong, T. J. Gulya, S. G. Markell, B. S. Hulke & L. L. Qi  Abstract: Few widely effective resistance sources to sunflower rust, incited by Puccinia helianthi Schwein., have been identified in confection sunflower (Helianthus annuus L.). The USDA inbred line HA-R6 is one of the few confection sunflower lines resistant to rust. A previous allelism test indicated that rust resistance genes

Brent S. Hulke, Bradley S. Bushman, Eric Watkin and Nancy J. Ehlke Abstract: Perennial ryegrass (Lolium perenne L.) is considered a premier turfgrass and forage grass worldwide yet susceptibility to freezing damage limits its use. C-repeat binding factor (CBF) dehydration-responsive element-binding protein (DREB) related genes are considered important for the regulation of abiotic stress in plants. In this study, CBF DREB-related genes in perennial