Location: Integrated Cropping Systems Research
Title: Resistance to soybean aphid in selected wild soybean accessions, 2018-2019Author
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Submitted to: Arthropod Management Tests
Publication Type: Other Publication Acceptance Date: 9/19/2019 Publication Date: 10/30/2019 Citation: Hesler, L.S., Beckendorf, E.A., Taliercio, E.W. 2019. Resistance to soybean aphid in selected wild soybean accessions, 2018-2019. Arthropod Management Tests. 44: tsz078. https://doi.org/10.1093/amt/tsz078. DOI: https://doi.org/10.1093/amt/tsz078 Interpretive Summary: Uncultivated, or wild-type, soybean has many useful traits that may be incorporated into modern soybean cultivars to improve grain yield. Resistance to the soybean aphid (SA) is a useful trait found in some wild soybean lines that could be used to breed resistant soybean cultivars. The goal of this study was to evaluate resistance against two different colonies of SA among a set of wild soybean plant introduction (PI) lines. Resistance of PI lines was assessed 14 days after exposure to SA when plants were in the 2-leaf stage. A PI line was deemed resistant if its average infestation ranking did not differ from that of the resistant check and had an average infestation rating corresponded to fewer than 100 SA per plant. Lines PI 597458 C and PI 407191wf were resistant to the first SA colony. Lines PI 407175, PI 407190, PI 407420, PI 507624, and PI 562558 were resistant to the second SA colony. These PI lines will likely be useful to soybean breeders in developing aphid-resistant soybean cultivars. Technical Abstract: Uncultivated, or wild-type, soybean has many useful traits that may be incorporated into modern soybean cultivars to improve grain yield. Resistance to soybean aphid (SA) is a useful trait found in some wild soybean lines that could be used to breed resistant soybean cultivars. The goal of this study was to evaluate resistance against two virulent colonies of SA among a set of select wild soybean plant introduction (PI) lines. Resistance of PI lines was assessed 14 d after exposure to SA in free-choice tests when plants were in the 2-leaf stage. A PI line was characterized as resistant if its mean infestation ranking did not differ from that of the resistant check and had a mean infestation rating that corresponded to fewer than 100 SA per plant. Lines PI 597458 C and PI 407191wf were resistant to the first SA colony; lines PI 407175, PI 407190, PI 407420, PI 507624, and PI 562558 were resistant to the second SA colony. These PI lines will be useful to soybean breeders in developing aphid-resistant soybean cultivars. |
