Fine mapping of Ae-Ps4.5, a major locus for resistance to pathotype III of Aphanomyces euteiches in pea

Lavaud, Clément; Lesné, Angélique; Leprévost, Théo; Pilet-Nayel, Marie-Laure

doi:10.1007/s00122-024-04548-6

Cited by 2 publications

(1 citation statement)

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“…MN313 was selected by Davis et al (1995), from a breeding program that employed screening of progenies in a disease nursery infested with A. euteiches in Minnesota, US. The specificity of the major-effect Ae-Ps4.5 QTL for pathotype III was recently confirmed (Lavaud et al, 2024). The identification of A. euteiches isolates within breeding nurseries is essential for understanding the effectiveness of detected QTL and the suitability of selected breeding lines regarding the diversity of pathogen populations.…”

Section: Distribution Of Pathotypes I and Iii Over French And America...mentioning

confidence: 89%

Pathotype characterization of Aphanomyces euteiches isolates collected from pea breeding nurseries

Moussart,

Lavaud,

Onfroy

et al. 2024

Front. Plant Sci.

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IntroductionAphanomyces euteiches Drechsler is an oomycete pathogen that affects legume crops, causing root rot, a severe disease of peas (Pisum sativum L.) worldwide. While significant research progress has been made in breeding pea-resistant varieties, there is still a need for a deeper understanding of the diversity of pathogen populations present in breeding nurseries located in various legume-growing regions around the world.MethodsWe analysed the diversity of 51 pea-infecting isolates of A. euteiches, which were recovered from four American (Athena, OR; Le Sueur, MN; Mount Vernon, WA; Pullman, WA) and three French (Riec-sur-Belon, Templeux-le-Guérard, Dijon) resistance screening nurseries. Our study focused on evaluating their aggressiveness on two sets of differential hosts, comprising six pea lines and five Medicago truncatula accessions.ResultsThe isolates clustered into three groups based on their aggressiveness on the whole pea set, confirming the presence of pathotypes I and III. Pathotype I was exclusive to French isolates and American isolates from Athena and Pullman, while all isolates from Le Sueur belonged to pathotype III. Isolates from both pathotypes were found in Mount Vernon. The M. truncatula set clustered the isolates into three groups based on their aggressiveness on different genotypes within the set, revealing the presence of five pathotypes. All the isolates from the French nurseries shared the same Fr pathotype, showing higher aggressiveness on one particular genotype. In contrast, nearly all-American isolates were assigned to four other pathotypes (Us1, Us2, Us3, Us4), differing in their higher aggressiveness on two to five genotypes. Most of American isolates exhibited higher aggressiveness than French isolates within the M. truncatula set, but showed lower aggressiveness than French isolates within the P. sativum set.DiscussionThese results provide valuable insights into A. euteiches pathotypes, against which the QTL and sources of resistance identified in these nurseries displayed effectiveness. They also suggest a greater adaptation of American isolates to alfalfa, a more widely cultivated host in the United States.

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Section: Distribution Of Pathotypes I and Iii Over French And America...mentioning

confidence: 89%

Pathotype characterization of Aphanomyces euteiches isolates collected from pea breeding nurseries

Moussart,

Lavaud,

Onfroy

et al. 2024

Front. Plant Sci.

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Understanding the root of the problem for tackling pea root rot disease

Trenk,

Pacheco-Moreno,

Arora

2024

Front. Microbiol.

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Pea (Pisum sativum), a crop historically significant in the field of genetics, is regaining momentum in sustainable agriculture due to its high protein content and environmental benefits. However, its cultivation faces significant challenges from root rot, a complex disease caused by multiple soil-borne pathogens prevalent across most pea growing regions. This disease leads to substantial yield losses, further complicated by the dynamic interactions among pathogens, soil conditions, weather, and agricultural practices. Recent advancements in molecular diagnostics provide promising tools for the early and precise detection of these pathogens, which is critical for implementing effective disease management strategies. In this review, we explore how the availability of latest pea genomic resources and emerging technologies, such as CRISPR and cell-specific transcriptomics, will enable a deeper understanding of the molecular basis underlying host-pathogen interactions. We emphasize the need for a comprehensive approach that integrates genetic resistance, advanced diagnostics, cultural practices and the role of the soil microbiome in root rot. By leveraging these strategies, it is possible to develop pea varieties that can withstand root rot, ensuring the crop's resilience and its continued importance in global agriculture.

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Fine mapping of Ae-Ps4.5, a major locus for resistance to pathotype III of Aphanomyces euteiches in pea

Cited by 2 publications

References 41 publications

Pathotype characterization of Aphanomyces euteiches isolates collected from pea breeding nurseries

Pathotype characterization of Aphanomyces euteiches isolates collected from pea breeding nurseries

Understanding the root of the problem for tackling pea root rot disease

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