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Resistance in Cultivated Sunflower Germplasm to the Red Sunflower Seed Weevil (Coleoptera: Curculionidae) in the Northern Great Plains

Abstract::: A 5 yr field study evaluated 49 sunflower, Helianthus annuus L., accessions, and 5 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 to attack was identified. The accession PI 162453 averaged only 8% damaged seed per head in 3 yr of testing and PI 431545 averaged 8% damaged seed per head in 4 yr of trials. The accessions PI 431542 and PI 650375, which were tested for five years, averaged 5% and 10% damaged seed per head, respectively over the study. PI 431542 averaged less than 6% in all but one year of testing. Additional accessions that appeared promising in two consecutive years of trials included PI 195573, PI 219649, PI 250085, and PI 432516. Hybrid 894 consistently had high seed damage from S. fulvus feeding. Results revealed potential for developing resistant genotypes for decreasing seed feeding injury by the red sunflower seed weevil. Research is in progress to introgress resistance genes from the identified lines into cultivated sunflower through conventional breeding facilitated by the use of markerassisted selection.
Author(s):: Charlet, Laurence D. , Seiler, Gerald J. , Grady, Kathleen A. , Hulke, Brent S. , Chirumamilla, Anitha
Subject(s):: Helianthus annuus , host plants , cultivars , germplasm , genetic variation , pest resistance , plant-insect relations , Smicronyx fulvus , insect pests , plant pests , Great Plains region
Description:: Includes references
Source:: Journal of the Kansas Entomological Society 2010 Jan., v. 83, no. 1
Language:: English
Year:: 2010
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
File:: Download [PDF]
Rights:: Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.