Resistance among selected wild soybean and associated soybean accessions against two virulent colonies of Aphis glycines
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ORIGINAL ARTICLE
Resistance among selected wild soybean and associated soybean accessions against two virulent colonies of Aphis glycines (Hemiptera: Aphididae) Louis S. Hesler
&
Earl Taliercio
Received: 1 April 2020 / Accepted: 27 August 2020 # This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2020
Abstract The soybean aphid (Aphis glycines) is an important pest of soybean (Glycine max). Wild soybean (Glycine soja; also known as ‘soja’) has many useful traits, including some accessions with aphid resistance that may be incorporated into modern soybean cultivars. The objective of this work was to evaluate 76 selected soja accessions and 14 associated soybean accessions for resistance against two virulent colonies of soybean aphid in environmental-chamber experiments. In freechoice tests, soja accessions PI 407175, PI 407190, PI 407206, PI 407240, PI 507624 and PI 562558 were resistant against the Accrue colony, and PI 407191wf and PI 597458 C were resistant against the Volga16 colony. None of the soybean test accessions except the resistant check, PI 437696, showed resistance against either colony in free-choice tests. In nochoice tests, soja accession PI 507624 showed strong resistance against the Accrue colony; whereas PI 407240 and PI 407190 had intermediate aphid levels; PI 597458 C showed strong resistance to Volga16 aphids, and PI 407191wf had an intermediate level of resistance. Based on results from both sets of tests, soja accessions PI 507624 and PI 597458 C may be
L. S. Hesler (*) North Central Agricultural Research Laboratory, Agricultural Research Service, USDA, 2923 Medary Ave Brookings, Brookings, SD 57006, USA e-mail: [email protected] E. Taliercio Soybean and Nitrogen Fixation Research Unit, Agricultural Research Service, USDA, Raleigh, NC 27607, USA
strong candidates in breeding programs to develop aphid-resistant soybean cultivars. Keywords Host-plant resistance . Virulence . Crop protection . Invasive species
Wild soybean (Glycine soja Siebold & Zucc.; hereafter ‘soja’) has many useful traits that may be incorporated into modern cultivars of soybean [Glycine max (L.) Merr.] to improve grain yield (Kofsky et al. 2018). A recent project has characterized agronomic, seed composition, and stress-resistance traits in a set of 80 select soja accessions with a diversity of maturity groups (Waldeck et al. 2017, La et al. 2019). The ultimate goal of the project is to identify soja accessions with advantageous traits for breeding into elite soybean cultivars (La et al. 2019). A method to capture the phenotypic and genetic diversity of wild soybean in agronomically valuable progeny has been published (Eickholt et al. 2019). Soja was also recently shown to contain several accessions with resistance to the soybean aphid (Aphis glycines Matsumura) (Hemiptera: Aphididae), a major insect pest of soybean in the Midwestern United States and south-central Canada and an occasional pest in eastern Asia (Hesler 2013; Hesler and Tilmon 2018a
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