Abstract
Soybean aphid (SBA; Aphis glycines Matsumura) and soybean cyst nematode (SCN; Heterodera glycines Ichninohe) are major pests of the soybean (Glycine max [L.] Merr.). Substantial progress has been made in identifying the genetic basis of limiting these pests in both model and non-model plant systems. Classical linkage mapping and genome-wide association studies (GWAS) have identified major and minor quantitative trait loci (QTLs) in soybean. Studies on interactions of SBA and SCN effectors with host proteins have identified molecular cues in various signaling pathways, including those involved in plant disease resistance and phytohormone regulations. In this paper, we review the molecular basis of soybean resistance to SBA and SCN, and we provide a synthesis of recent studies of soybean QTLs/genes that could mitigate the effects of virulent SBA and SCN populations. We also review relevant studies of aphid–nematode interactions, particularly in the soybean–SBA–SCN system.
Highlights
Soybean (Glycine max [L.] Merr.), a source of high-quality sugar, protein, and oil, is one of the most important crops worldwide [1]
It has been present in North America since at least 2000, when it was first considered to be a major pest in China, Japan, the Philippines, South Korea, Indonesia, Malaysia, reported in the state of Wisconsin [2], and has spread to Australia [18]
The authors suggested genes belonging to the cathepsin B and RR-2 cuticular protein gene families undergo rapid transcriptional plasticity, and that this allows the green peach aphid to infest a wide range of plant species
Summary
Soybean (Glycine max [L.] Merr.), a source of high-quality sugar, protein, and oil, is one of the most important crops worldwide [1]. Various SBA and SCN resistance components are shown in process the projected green and yellow boxes, The circular represents process the of induced susceptibility withinrectangular conspecifics ofrespectively. The studies dashed discussed arrows represent interactions between soybean aphid and SCN identified by the various in thisthe review. Interactions between soybean aphid and SCN identified by the various studies discussed in this review. The (+) and (−) signs represent the positive and negative effects, respectively This illustration was created using Biorender (https://app.biorender.com/). = genome-wide association studies, Rag = resistance to Aphis glycines, and α-SNAP = α. GWAS = genome-wide association studies, Rag = resistance to Aphis glycines, and α-SNAP = α soluble N-ethylmaleimide–sensitive factor attachment soluble N-ethylmaleimide–sensitive factor attachmentprotein)
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