Molecular characterization of genomic regions for resistance to Pythium ultimum var. ultimum in the soybean cultivar Magellan

Klepadlo, Mariola; Balk, Christine; Vuong, Tri D.; Dorrance, Anne E.; Nguyen, Henry T.

doi:10.1007/s00122-018-3228-x

Cited by 27 publications

(19 citation statements)

References 48 publications

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“…ultimum var. ultimum (Klepadlo et al, 2018). Thus, the QDRL identified on chromosomes 1, 2, 3, 5, 7, 13, and 17 towards Py.…”

Section: Discussionmentioning

confidence: 88%

“…Resistance to Py. ultimum was identified in the cultivar Magellan and mapped to chromosomes 6 and 8 (Klepadlo et al, 2018). Additionally, two QDRL conferring resistance to Py.…”

mentioning

confidence: 99%

“…Resistance towards P. sojae has been identified in numerous soybean genotypes; >25 single Rps genes as well as numerous quantitative trait loci (QTL) have been mapped (Dorrance and Schmitthenner, 2000;Wang et al, 2010Wang et al, , 2012bLee et al, 2014;Matthiesen et al, 2016;Schneider et al, 2016;Dorrance, 2018). Although resistance towards Pythium has been identified in several soybean genotypes (Griffin, 1990;Bates et al, 2008;Ellis et al, 2013;Balk, 2014), it has only been mapped towards three species of Pythium to date (Rosso et al, 2008;Ellis et al, 2013;Stasko et al, 2016;Urrea et al, 2017;Lin et al, 2018;Klepadlo et al, 2018). A single R gene was mapped on chromosome 13 for resistance to Py.…”

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confidence: 99%

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Quantitative Disease Resistance Loci towards Phytophthora sojae and Three Species of Pythium in Six Soybean Nested Association Mapping Populations

et al. 2019

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Comparison of quantitative disease resistance loci (QDRL) towards the diverse array of soilborne pathogens that affect soybean [Glycine max (L.) Merr.] is key to the incorporation of resistance in breeding programs. The water molds Phytophthora sojae (Kauffman & Gerdmann), Pythium irregulare (Buisman), Pythium ultimum var. ultimum (Trow), and Pythium ultimum var. sporangiiferum (Drechsler) contribute to soybean yield losses annually. Six Soybean Nested Association Mapping (SoyNAM) populations were evaluated for resistance to one or more of these pathogens. Four were screened with a tray test to measure lesion length after inoculation with Ph. sojae; cup assays were used to screen three, three, and two populations for resistance towards Py. irregulare, Py. ultimum var. ultimum, and Py. ultimum var. sporangiiferum, respectively. There were two to eight major or minor QDRL identified within each SoyNAM population towards one or more of these water molds for a total of 33 QDRL. The SoyNAM populations evaluated for resistance to two or more water molds had different QDRL towards each pathogen, indicating that within a source of resistance, mechanisms are potentially specific to the pathogen. Only 3 of the 33 QDRL were associated with resistance to more than one pathogen. There was a major QDRL on chromosome 3 associated with resistance to Py. ultimum var. ultimum and Py. ultimum var. sporangiiferum, and QDRL on chromosomes 13 and 17 shared a flanking marker for both Py. irregulare and Py. ultimum var. ultimum. The SoyNAM population can serve as a diverse resource to map QDRL and compare mechanisms across pathogens and isolates.

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“…ultimum var. ultimum (Klepadlo et al, 2018). Thus, the QDRL identified on chromosomes 1, 2, 3, 5, 7, 13, and 17 towards Py.…”

Section: Discussionmentioning

confidence: 88%

“…Resistance to Py. ultimum was identified in the cultivar Magellan and mapped to chromosomes 6 and 8 (Klepadlo et al, 2018). Additionally, two QDRL conferring resistance to Py.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Quantitative Disease Resistance Loci towards Phytophthora sojae and Three Species of Pythium in Six Soybean Nested Association Mapping Populations

et al. 2019

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“…A recent study in soybean reported colocalization of QTL for fresh root weight and root rot score on chromosomes Gm6 and Gm8 under Pythium ultimum var. ultimum in a Magellan × PI 438489B mapping population (Klepadlo et al, 2019). Interestingly, Pv02 chromosome of common bean is syntenic with Gm01, Gm02, Gm05, Gm08 and Gm11, whereas Pv09 is syntenic with Gm4 and Gm6 chromosomes in soybean, respectively (McClean et al, 2010; Schmutz et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Genome‐wide association analysis of resistance to Pythium ultimum in common bean (Phaseolus vulgaris)

et al. 2020

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Common bean is the most important edible grain legume and dietary component in the world (Gepts et al., 2008). Bean contributes significantly to food and nutritional security of millions in sub-Saharan Africa and the developing world, providing a cheap protein source and micronutrients such as iron and zinc (Broughton et al., 2003; Graham et al., 2007), and income for smallholder farmers. However, productivity of common bean in many parts of Central and South America, and Africa is constrained by several diseases that includes root rots (RR) (Abawi and Corrales, 1990). Common bean RR caused by a complex of numerous soil-borne pathogenic fungi including Fusarium solani f. sp. phaseoli, Pythium spp., Rhizoctonia solani and Sclerotium rolfsii Sacc. are the primary cause of crop failures among subsistence farmers in the East African Region (Abawi and Corrales,

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“…The QTLs on chromosomes 6 and 8 also colocalized with two QTLs found associated with resistance to Pythium ultimum. These QTLs, associated with P. ultimum resistance, on chromosomes 6 and 8 explain 7.5-13.5% and 6.3-16.8% of the phenotypic variance, respectively [363].…”

Section: Pythium Root Rotmentioning

confidence: 98%

Understanding Root Rot Disease in Agricultural Crops

Williamson-Benavides¹,

Dhingra²

2020

Preprint

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Root rot diseases remain a major global threat to the productivity of agricultural crops. They are usually caused by more than one type of pathogen and are thus often referred to as a root rot complex. Fungal and oomycete species are the predominant participants in the complex, while bacteria and viruses are also known to cause root rot. Incorporating genetic resistance in cultivated crops is considered as the most efficient and sustainable solution to counter root rot; however, resistance is often quantitative in nature. Several genetics studies in various crops have identified quantitative trait loci associated with resistance. With access to whole genome sequences, the identity of the genes within the reported loci is becoming available. Several of the identified genes have been implicated in pathogen response. However, it is becoming apparent that at the molecular level, each pathogen engages a unique set of proteins to either infest the host successfully or be defeated or contained in doing so. In this review, a comprehensive summary of the genes and potential mechanisms underlying resistance or susceptibility against the most investigated root rots of important agricultural crops is presented.

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Molecular characterization of genomic regions for resistance to Pythium ultimum var. ultimum in the soybean cultivar Magellan

Cited by 27 publications

References 48 publications

Quantitative Disease Resistance Loci towards Phytophthora sojae and Three Species of Pythium in Six Soybean Nested Association Mapping Populations

Quantitative Disease Resistance Loci towards Phytophthora sojae and Three Species of Pythium in Six Soybean Nested Association Mapping Populations

Genome‐wide association analysis of resistance to Pythium ultimum in common bean (Phaseolus vulgaris)

Understanding Root Rot Disease in Agricultural Crops

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