PoplarV1, Main, Exploration, bibRecord, 002913

Somatic hybridization in the Uredinales.

Identifieur interne : 002913 ( Main/Exploration ); précédent : 002912; suivant : 002914

Somatic hybridization in the Uredinales.

Auteurs : Robert F. Park [Australie] ; Colin R. Wellings

Source :

Annual review of phytopathology [ 1545-2107 ] ; 2012.

RBID : pubmed:22920559

Descripteurs français

KwdFr :
- Basidiomycota (croissance et développement), Basidiomycota (génétique), Basidiomycota (pathogénicité), Génotype (MeSH), Haploïdie (MeSH), Hybridation génétique (MeSH), Maladies des plantes (microbiologie), Plantes (microbiologie), Recombinaison génétique (MeSH), Résistance à la maladie (MeSH), Triticum (microbiologie), Variation génétique (MeSH).
MESH :
- croissance et développement : Basidiomycota.
- génétique : Basidiomycota.
- microbiologie : Maladies des plantes, Plantes, Triticum.
- pathogénicité : Basidiomycota.
- Génotype, Haploïdie, Hybridation génétique, Recombinaison génétique, Résistance à la maladie, Variation génétique.

English descriptors

KwdEn :
- Basidiomycota (genetics), Basidiomycota (growth & development), Basidiomycota (pathogenicity), Disease Resistance (MeSH), Genetic Variation (MeSH), Genotype (MeSH), Haploidy (MeSH), Hybridization, Genetic (MeSH), Plant Diseases (microbiology), Plants (microbiology), Recombination, Genetic (MeSH), Triticum (microbiology).
MESH :
- genetics : Basidiomycota.
- growth & development : Basidiomycota.
- microbiology : Plant Diseases, Plants, Triticum.
- pathogenicity : Basidiomycota.
- Disease Resistance, Genetic Variation, Genotype, Haploidy, Hybridization, Genetic, Recombination, Genetic.

Abstract

Rust fungi are cosmopolitan in distribution and parasitize a wide range of plants, including economically important crop species such as wheat. Detailed regional, national, and continental surveys of pathogenic variability in wheat-attacking rust pathogens over periods of up to 90 years have shown that in the absence of sexual recombination, genetic diversity is generated by periodic introduction of exotic isolates, single-step mutation, and somatic hybridization. Laboratory studies have provided evidence for somatic hybridization between many rust species and formae speciales, and there is evidence for the process in nature within and between rust species on Linum, poplar, Senecio, wheat, and several grass species. Although the mechanisms involved in somatic hybridization are not well understood, they are thought to involve the fusion of dikaryotic vegetative hyphae, nuclear exchange, and possibly exchange of whole chromosomes between nuclei or parasexuality via the fusion of the two haploid nuclei, followed by mitotic crossing over and vegetative haploidization. In three cases, hybrid isolates rendered resistant plant genotypes susceptible because of new combinations of virulence. Implications for resistance breeding and future prospects in understanding the process are discussed.

DOI: 10.1146/annurev-phyto-072910-095405
PubMed: 22920559

Affiliations:

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Le document en format XML

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<term>Basidiomycota (pathogenicity)</term>
<term>Disease Resistance (MeSH)</term>
<term>Genetic Variation (MeSH)</term>
<term>Genotype (MeSH)</term>
<term>Haploidy (MeSH)</term>
<term>Hybridization, Genetic (MeSH)</term>
<term>Plant Diseases (microbiology)</term>
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<term>Recombination, Genetic (MeSH)</term>
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<term>Basidiomycota (génétique)</term>
<term>Basidiomycota (pathogénicité)</term>
<term>Génotype (MeSH)</term>
<term>Haploïdie (MeSH)</term>
<term>Hybridation génétique (MeSH)</term>
<term>Maladies des plantes (microbiologie)</term>
<term>Plantes (microbiologie)</term>
<term>Recombinaison génétique (MeSH)</term>
<term>Résistance à la maladie (MeSH)</term>
<term>Triticum (microbiologie)</term>
<term>Variation génétique (MeSH)</term>
</keywords>
<keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Basidiomycota</term>
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<keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Basidiomycota</term>
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<keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Maladies des plantes</term>
<term>Plantes</term>
<term>Triticum</term>
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<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Plant Diseases</term>
<term>Plants</term>
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<term>Recombination, Genetic</term>
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<term>Haploïdie</term>
<term>Hybridation génétique</term>
<term>Recombinaison génétique</term>
<term>Résistance à la maladie</term>
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<front><div type="abstract" xml:lang="en">Rust fungi are cosmopolitan in distribution and parasitize a wide range of plants, including economically important crop species such as wheat. Detailed regional, national, and continental surveys of pathogenic variability in wheat-attacking rust pathogens over periods of up to 90 years have shown that in the absence of sexual recombination, genetic diversity is generated by periodic introduction of exotic isolates, single-step mutation, and somatic hybridization. Laboratory studies have provided evidence for somatic hybridization between many rust species and formae speciales, and there is evidence for the process in nature within and between rust species on Linum, poplar, Senecio, wheat, and several grass species. Although the mechanisms involved in somatic hybridization are not well understood, they are thought to involve the fusion of dikaryotic vegetative hyphae, nuclear exchange, and possibly exchange of whole chromosomes between nuclei or parasexuality via the fusion of the two haploid nuclei, followed by mitotic crossing over and vegetative haploidization. In three cases, hybrid isolates rendered resistant plant genotypes susceptible because of new combinations of virulence. Implications for resistance breeding and future prospects in understanding the process are discussed.</div>
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Somatic hybridization in the Uredinales.

Somatic hybridization in the Uredinales.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki