Helianthus

Pollen quantity, but not grain size, is correlated with floret size in cultivated sunflower, Helianthus annuus L.

peer-reviewed journal publication, Sunflower /

Authors: Jarrad R. Prasifka, Zoe M. Portlas, and Brent S. Hulke Publication Date: September 25, 2023 Abstract: Cultivated sunflower (Helianthus annuus L.) pollen helps attract wild and managed bees needed to produce hybrid seed. Pollen quantity and grain size (≈quality) are affected by the environment, but are also heritable traits of interest for breeding. Florets from […]

Pollen quantity, but not grain size, is correlated with floret size in cultivated sunflower, Helianthus annuus L. Read More »

Two contrasting laboratory methods improve Silphium integrifolium Michx. germination rate to agronomically acceptable levels

peer-reviewed journal publication, Silphium /

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

Two contrasting laboratory methods improve Silphium integrifolium Michx. germination rate to agronomically acceptable levels Read More »

Variation in floret size explains differences in wild bee visitation to cultivated sunflowers

peer-reviewed journal publication, Sunflower /

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

Variation in floret size explains differences in wild bee visitation to cultivated sunflowers Read More »

Genetic Architecture of Capitate Glandular Trichome Density in Florets of Domesticated Sunflower (Helianthus annuus L.)

peer-reviewed journal publication, Sunflower /

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

Genetic Architecture of Capitate Glandular Trichome Density in Florets of Domesticated Sunflower (Helianthus annuus L.) Read More »