Brent S. Hulke, Samuel G. Markell, Nolan C. Kane, Febina M. Mathew Abstract: Climate change is occurring in the central US and is interacting with agroecological factors to increase biotic stress in sunflower. Certain species of Diaporthe cause Phomopsis stem canker in sunflower and other dicotyledonous weeds and crops. The increase in precipitation already observed […]
Stephan Reinert, Kennedy L. Money, Greta B. G. Rockstad, Nolan C. Kane, David L. Van Tassel, Brent S. Hulke Abstract: Organic dormancy, the inability to germinate under favorable conditions, is a common problem in many crop species and their wild relatives, leading to more variable emergence, plant density, and growth rates, thus increasing costs, and
Jarrad Prasifka, Rachel Mallinger, Zoe Portlas, Brent Hulke, Karin Fugate, Travis Paradis, Marshall Hampton, Clay Carter Abstract: Floral nectar and other rewards facilitate crop pollination, and in so doing, increase the amount and breadth of food available for humans. Though pollinator abundance and diversity (particularly bees) have declined over the past several decades, a concomitant
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Zoe M. Portlas, Jonathan R. Tetlie, Deirdre Prischmann-Voldseth, Brent S. Hulke, Jarrad R. Prasifka Abstract: Wild and managed bees are needed to move sunflower (Helianthus annuus L.) pollen, both to create hybrid seed and to encourage high, consistent yields when those hybrids are subsequently grown. Among floral traits that influence bee preference, floret size may be
Brent Hulke, Guojia Ma, Lili Qi, Thomas Gulya Abstract: Sclerotinia head and stalk rots [caused by Sclerotinia sclerotiorum (Lib.) de Bary] are among the most devastating diseases in sunflower (Helianthus annuus L.). Breeding for resistance to these diseases is complicated by the quantitative inheritance of the resistance, for which there are few genes of major
Brent Hulke, William May Abstract: Northward expansion and double crop use of sunflower (Helianthus annuus L.) is limited by the lack of commercial hybrids with early maturity. We seek to provide the sunflower industry with new, early maturing restorer inbred germplasms with high yield potential and favorable agronomic and seed oil traits, specifically resistance to
Qing-Ming Gao, Nolan C. Kane, Brent S. Hulke, Stephan Reinert, Cloe S. Pogoda, Silas Tittes, Jarrad R. Prasifka Abstract: Capitate glandular trichomes (CGT), one type of glandular trichomes, are most common in Asteraceae species. CGT can produce various secondary metabolites such as sesquiterpene lactones (STLs) and provide durable resistance to insect pests. In sunflower, CGT-based
Jarrad Prasifka, Rachel Mallinger, Brent Hulke, Steven Larson, David Van Tassel Abstract: Sampling in Kansas and North Dakota documented the plant-herbivore and plant-pollinator interactions of the developing perennial oilseed crop, Silphium integrifolium Michx. The larva of the tortricid moth, Eucosma giganteana (Riley), was the most common floret- and seed-feeding pest in Kansas, with infested heads
David Van Tassel, Kenneth Albrecht, James Bever, Arvid Boe, Yaniv Brandvain, Timothy Crews, Markus Gansberger, Pedro Gerstberg, Luciana Gonzalez-paleo, Brent Hulke, Nolan Kane, Paul Johnson, Valentin Picasso Risso, Elena Pestsova, Jarrad Prasifka, Damian Ravetta, Brandon Schlautman, Craig Sheaffer, Kevin Smith, Pablo Speranza, Kathryn Turner, Alejandra Vilela, Philippe Von Gehren, Christian Weaver Abstract: Silphium perfoliatum L.
Xuelin Fu, Lili Qi, Brent Hulke, Gerald Seiler, Chao-Chien Jan Abstract: Somatic embryogenesis in vitro provides an efficient means of plant multiplication, facilitating sunflower improvement and germplasm innovation. In the present study, using interspecific amphiploids (2n=4x=68) between cultivated sunflower and wild perennial Helianthus species as explant donors, somatic embryos were induced directly from the surface of corolla
