Evaluation of wild perennial Glycine species for resistance to soybean cyst nematode and soybean rust

The genetic base for soybean cultivars is narrow compared to most other crop species. Twenty‐seven wild perennial Glycine species comprise the tertiary gene pool to soybean that may contain many genes of economic importance for soybean improvement. We evaluated 16 accessions of G. argyrea, G. clande...

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Bibliographic Details
Published in:Plant breeding 2020-10, Vol.139 (5), p.923-931
Main Authors: Herman, Theresa K., Han, Jaeyeong, Singh, Ram J., Domier, Leslie L., Hartman, Glen L., Link, Wolfgang
Format: Article
Language:English
Subjects:
Cultivars
Cysts
Economic importance
Evaluation
Gene pool
Genes
Glycine
Glycine species
Glycine tomentella
Heterodera glycines
Hybridization
Nematodes
Pest resistance
Plant introductions
resistance
Rust fungi
soybean
soybean cyst nematode
soybean rust
Soybeans
Species
wide hybridization
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Summary:The genetic base for soybean cultivars is narrow compared to most other crop species. Twenty‐seven wild perennial Glycine species comprise the tertiary gene pool to soybean that may contain many genes of economic importance for soybean improvement. We evaluated 16 accessions of G. argyrea, G. clandestina, G. dolichocarpa, and G. tomentella for resistance to Heterodera glycines (HG), also known as the soybean cyst nematode, and to multiple isolates of Phakopsora pachyrhizi, the causal fungus of soybean rust. All 16 accessions were classified as resistant to H. glycines HG Type 2.5.7, based on number of cysts per root mass with plant introductions (PIs) 483227, 509501, 563892, and 573064 (all G. tomentella) void of any cysts indicating no reproduction by this pest. All 16 accessions had an immune reaction to one isolate of P. pachyrhizi. Regardless of isolate, no sporulating uredinia were observed on G. argyrea (PI 505151) and G. tomentella (PIs 483227, 509501, and 573064). These results demonstrate that some accessions within the perennial Glycine species harbour resistance to both H. glycines and P. pachyrhizi and would be good candidates for wide hybridization programs seeking to transfer potentially unique multiple resistance genes into soybean.
ISSN:0179-9541
1439-0523
DOI:10.1111/pbr.12834