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

2020 ◽  
Vol 139 (5) ◽  
pp. 923-931
Author(s):  
Theresa K. Herman ◽  
Jaeyeong Han ◽  
Ram J. Singh ◽  
Leslie L. Domier ◽  
Glen L. Hartman
Keyword(s):  
Soybean Cyst Nematode ◽  
Cyst Nematode ◽  
Soybean Rust ◽  
Glycine Species

scholarly journals Accessions of Perennial Glycine Species With Resistance to Multiple Types of Soybean Cyst Nematode (Heterodera glycines)

Plant Disease ◽  
2017 ◽  
Vol 101 (7) ◽  
pp. 1201-1206 ◽  
Author(s):  
L. Wen ◽  
C. Yuan ◽  
T. K. Herman ◽  
G. L. Hartman
Keyword(s):  
Resistance Genes ◽  
Soybean Cyst Nematode ◽  
Heterodera Glycines ◽  
Cost Effective ◽  
Cyst Nematode ◽  
Disease Genes ◽  
Sources Of Resistance ◽  
Plant Introductions ◽  
Glycine Species ◽  
Cost Effective Method

Soybean cyst nematode (SCN; Heterodera glycines; HG) is a widely occurring and damaging pathogen that limits soybean production. Developing resistant cultivars is the most cost-effective method for managing this disease. Genes conferring SCN resistance in soybean have been identified; however, there are SCN populations that overcome known resistance genes. In order to identify additional sources of resistance and potentially new resistance genes, 223 plant introductions (PIs) of G. tomentella and 59 PIs of 12 other perennial Glycine species were inoculated with HG Types 0, HG 2, and HG 1.2.3, and then 36 PIs out of this set were further evaluated with HG Type 1.2.3.4.5.6.7, a population that overcomes all the resistance genes in soybean. Of 223 G. tomentella PIs evaluated, 86 were classified as resistant to three HG types, 69 as resistant to two HG types, and 22 as resistant to one HG type. Of the other 12 perennial Glycine species, all PIs of G. argyrea and G. pescadrensis were resistant to all three HG types. Of the 36 PIs challenged with HG Type 1.2.3.4.5.6.7, 35 were resistant with 16 showing no cyst reproduction. Our study confirms that there are high levels of resistance to SCN among the perennial Glycine species. This represents an untapped resource for use in genetic studies and for improving resistance to SCN in soybean.

Effect of Diseases on Soybean Yield in the Top Eight Producing Countries in 2006

2010 ◽  
Vol 11 (1) ◽  
pp. 29 ◽  
Author(s):  
A. Wrather ◽  
G. Shannon ◽  
R. Balardin ◽  
L. Carregal ◽  
R. Escobar ◽  
...  
Keyword(s):  
Soybean Cyst Nematode ◽  
Yield Loss ◽  
Total Yield ◽  
Cyst Nematode ◽  
Brown Spot ◽  
Soybean Rust ◽  
Phakopsora Pachyrhizi ◽  
Field Surveys ◽  
Glycine Max L ◽  
Systematic Field

The objective of this project was to compile estimates of yield loss in soybean [Glycine max (L.) Merr] to diseases in the top eight soybean-producing countries in 2006. The purpose was to provide information needed by local and world agencies to allocate funds for research and to help scientists focus and coordinate research efforts. Methods used by plant pathologists to estimate yield loss to diseases in these countries included systematic field surveys, cultivar trials, diagnostic clinic records, personal observations, and questionnaires sent to crop consultants and extension staff. The 2006 harvest of soybeans in the top eight soybean-producing countries was reduced an estimated 59.9 million metric tonnes (t) by diseases according to results of the current study. Soybean rust, caused by Phakopsora pachyrhizi, reduced yield in all these countries except Canada in 2006, and the total was more than any other. Next in decreasing order of total yield loss were soybean cyst nematode, brown spot, seedling diseases, anthracnose, and charcoal rot. Accepted for publication 27 October 2009. Published 25 January 2010.

Identification of novel haplotype of a cyst nematode resistance gene, GmSNAP18 in soybean [Glycine max (L.) Merr.]

2020 ◽  
Vol 80 (03) ◽  
Author(s):  
Ik-Young Choi ◽  
Prakash Basnet ◽  
Hana Yoo ◽  
Neha Samir Roy ◽  
Rahul Vasudeo Ramekar ◽  
...  
Keyword(s):  
Soybean Cyst Nematode ◽  
Gene Families ◽  
Nematode Resistance ◽  
Cyst Nematode ◽  
Soybean Breeding ◽  
Resistant Varieties ◽  
Soybean Genotypes ◽  
Glycine Max L ◽  
Scn Resistance

Soybean cyst nematode (SCN) is one of the most damaging pest of soybean. Discovery and characterization of the genes involved in SCN resistance are important in soybean breeding. Soluble NSF attachment protein (SNAP) genes are related to SCN resistance in soybean. SNAP genes include five gene families, and 2 haplotypes of exons 6 and 9 of SNAP18 are considered resistant to the SCN. In present study the haplotypes of GmSNAP18 were surveyed and chacterized in a total of 60 diverse soybean genotypes including Korean cultivars, landraces, and wild-types. The target region of exons 6 and 9 in GmSNAP18 region was amplified and sequenced to examine nucleotide variation. Characterization of 5 haplotypes identified in present study for the GmSNAP18 gene revealed two haplotypes as resistant, 1 as susceptible and two as novel. A total of twelve genotypes showed resistant haplotypes, and 45 cultivars were found susceptible. Interestingly, the two novel haplotypes were present in 3 soybean lines. The information provided here about the haplotypic variation of GmSNAP18 gene can be further explored for soybean breeding to develop resistant varieties.

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