Genetic variation and structure of Sclerotinia sclerotiorum populations from soybean in Brazil

Pannullo, Anthony G.; Kamvar, Zhian N.; Miorini, T; Steadman, James R.; Everhart, Sydney E.

doi:10.1007/s40858-018-0266-5

Cited by 9 publications

(4 citation statements)

References 48 publications

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“…Sclerotinia sclerotiorum is rich in genetic diversity worldwide [69][70][71][72][73][74][75][76]. Previously, the Chinese S. sclerotiorum population was found to have a greater genetic variance for most of the traits than the US population and they did not share any mycelial compatibility groups or multilocus haplotypes [46].…”

Section: Discussionmentioning

confidence: 99%

Fungal Strains with Identical Genomes Were Found at a Distance of 2000 Kilometers after 40 Years

Zhu

Lin²,

Lyu³

et al. 2022

JoF

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Heredity and variation are inherent characteristics of species and are mainly reflected in the stability and variation of the genome; the former is relative, while the latter is continuous. However, whether life has both stable genomes and extremely diverse genomes at the same time is unknown. In this study, we isolated Sclerotinia sclerotiorum strains from sclerotium samples in Quincy, Washington State, USA, and found that four single-sclerotium-isolation strains (PB4, PB273, PB615, and PB623) had almost identical genomes to the reference strain 1980 isolated in the west of Nebraska 40 years ago. The genome of strain PB4 sequenced by the next-generation sequencing (NGS) and Pacific Biosciences (PacBio) sequencing carried only 135 single nucleotide polymorphisms (SNPs) and 18 structural variations (SVs) compared with the genome of strain 1980 and 48 SNPs were distributed on Contig_20. Based on data generated by NGS, three other strains, PB273, PB615, and PB623, had 256, 275, and 262 SNPs, respectively, against strain 1980, which were much less than in strain PB4 (532 SNPs) and none of them occurred on Contig_20, suggesting much closer genomes to strain 1980 than to strain PB4. All other strains from America and China are rich in SNPs with a range of 34,391–77,618 when compared with strain 1980. We also found that there were 39–79 SNPs between strain PB4 and its sexual offspring, 53.1% of which also occurred on Contig_20. Our discoveries show that there are two types of genomes in S. sclerotiorum, one is very stable and the other tends to change constantly. Investigating the mechanism of such genome stability will enhance our understanding of heredity and variation.

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Section: Discussionmentioning

confidence: 99%

Fungal Strains with Identical Genomes Were Found at a Distance of 2000 Kilometers after 40 Years

Zhu

Lin²,

Lyu³

et al. 2022

JoF

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“…Some of the major economic crops affected include dry bean, potato, soybean [ Glycine max (L.) Merr. ], sunflower ( Helianthus annuus L.), canola ( Brassica napus L.), lettuce ( Lactuca sativa L.), carrot ( Daucus carota L.), and pea ( Pisum sativum L.) ( Carpenter et al, 1999 ; Mert-Türk et al, 2007 ; Hemmati et al, 2009 ; Attanayake et al, 2013 ; Lehner et al, 2015 ; Abán et al, 2018 ; Panullo et al, 2018 ). In Argentina, WM has been detected in all bean production areas, reaching seed yield and quality losses up to 80–100% on susceptible common bean cultivars under favorable weather conditions ( Singh and Schwartz, 2010 ).…”

Section: White Moldmentioning

confidence: 99%

“…However, other studies have suggested taking into account the structure imposed by the MCGs in addition to a set of molecular markers in population analyses ( Lehner and Mizubuti, 2017 ; Lehner et al, 2019 ; Silva et al, 2021 ). Over the past few years, the population structure of S. sclerotiorum has been extensively documented from different host crops and from different regions in the world ( Atallah et al, 2004 ; Sexton et al, 2006 ; Hemmati et al, 2009 ; Ekins et al, 2011 ; Attanayake et al, 2013 ; Clarkson et al, 2013 , 2017 ; Aldrich-Wolfe et al, 2015 ; Dunn et al, 2017 ; Panullo et al, 2018 ; Faraghati et al, 2022 ). In early studies, S. sclerotiorum populations exhibited a predominantly clonal population structure with low genetic diversity based on MCGs and DNA fingerprinting genotypes ( Kohli et al, 1992 ; Cubeta et al, 1997 ; Hambleton et al, 2002 ).…”

Section: White Moldmentioning

confidence: 99%

“…In early studies, S. sclerotiorum populations exhibited a predominantly clonal population structure with low genetic diversity based on MCGs and DNA fingerprinting genotypes ( Kohli et al, 1992 ; Cubeta et al, 1997 ; Hambleton et al, 2002 ). However, in subsequent studies, evidence of recombinant populations and mixed population structures with high rates of genetic variability have been reported using microsatellite (SSR) markers and linkage disequilibrium measures ( Atallah et al, 2004 ; Sexton and Howlett, 2004 ; Hemmati et al, 2009 ; Attanayake et al, 2014 ; Panullo et al, 2018 ). Whether a pathogen population is clonal or recombining is best addressed by studying the association of alleles among different loci through the index of association ( I A ) ( Smith et al, 1993 ; Milgroom, 1996 ) based on clone-corrected data to reduce the bias produced by overrepresented data and to increase sensitivity in the detection of recombination ( Milgroom, 1996 ).…”

Section: White Moldmentioning

confidence: 99%

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Characterization of fungal pathogens and germplasm screening for disease resistance in the main production area of the common bean in Argentina

et al. 2022

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The common bean (Phaseolus vulgaris L.) is the most important grain legume in the human diet, mainly in Africa and Latin America. Argentina is one of the five major producers of the common bean in the world, and the main cultivation areas are concentrated in the northwestern provinces of this country. Crop production of the common bean is often affected by biotic factors like some endemic fungal diseases, which exert a major economic impact on the region. The most important fungal diseases affecting the common bean in Argentina are white mold caused by Sclerotinia sclerotiorum, angular leaf spot caused by Pseudocercospora griseola, web blight and root rot caused by Rhizoctonia solani, which can cause production losses of up to 100% in the region. At the present, the most effective strategy for controlling these diseases is the use of genetic resistance. In this sense, population study and characterization of fungal pathogens are essential for developing cultivars with durable resistance. In this review we report diversity studies carried out on these three fungal pathogens affecting the common bean in northwestern Argentina, analyzing more than 200 isolates by means of molecular, morphological and pathogenic approaches. Also, the screening of physiological resistance in several common bean commercial lines and wild native germplasm is reviewed. This review contributes to the development of sustainable management strategies and cultural practices in bean production aimed to minimize yield losses due to fungal diseases in the common bean.

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Population structure of the fungus Sclerotinia sclerotiorum in common bean fields of Argentina

et al. 2021

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Genetic variation and structure of Sclerotinia sclerotiorum populations from soybean in Brazil

Cited by 9 publications

References 48 publications

Fungal Strains with Identical Genomes Were Found at a Distance of 2000 Kilometers after 40 Years

Fungal Strains with Identical Genomes Were Found at a Distance of 2000 Kilometers after 40 Years

Characterization of fungal pathogens and germplasm screening for disease resistance in the main production area of the common bean in Argentina

Population structure of the fungus Sclerotinia sclerotiorum in common bean fields of Argentina

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