Bremia lactucae populations on cultivated lettuce originate from prickly lettuce and are interconnected with the wild pathosystem

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F21%3A73609114" target="_blank" >RIV/61989592:15310/21:73609114 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007%2Fs10658-021-02332-6" target="_blank" >https://link.springer.com/article/10.1007%2Fs10658-021-02332-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10658-021-02332-6" target="_blank" >10.1007/s10658-021-02332-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bremia lactucae populations on cultivated lettuce originate from prickly lettuce and are interconnected with the wild pathosystem

Popis výsledku v původním jazyce

Bremia lactucae is a devastating pathogen causing heavy yield losses in lettuce production worldwide. Long time it was thought to infect various members of the Asteraceae but recent phylogenetic investigations revealed that B. lactucae is restricted to cultivated Lactuca sativa and its wild progenitor Lactucaserriola. Many resistance genes in cultivated lettuce were crossbred from L. serriola, but often a fast overcoming of the resistance in the crop by new downy mildew races was observed. Consequently, it seems important to investigate the population genetic relationships of wild prickly lettuce and cultivated lettuce, in order to determine, if the Bremia lineages infecting these hosts are distinct or intermingled. In the first case, searching for resistance in prickly lettuce is straightforward, in the second case it would rather be futile. Bremia belongs to the genera of downy mildews with pyriform haustoria, which feature highly variable ITSrepeats that can be used as high-resolution markers for population genetics studies. Here we report that Bremia lactucae on Lactuca sativa is not homogeneous but emerged from several host shifts from Lactuca serriola and that Bremia accessions from both species are not forming distinct genepools. While the pathogen population from L. serriola showed a balanced pattern, the pathogen population from L. sativa has a directional selection pattern reflecting founder effects after host shifts, resulting in a fast colonisation of susceptible lettuce cultivars. Thus, the wild population of Bremia lactucae seems to play a major role in the epidemiology of downy mildew on cultivated lettuce. This also explains, why resistance breeding using resistance genes from prickly lettuce had little success for achieving durable resistance in cultivated lettuce and calls for both more detailed research into Bremia on wild lettuce and new breeding strategies using less closely related lettuce species.

Název v anglickém jazyce

Bremia lactucae populations on cultivated lettuce originate from prickly lettuce and are interconnected with the wild pathosystem

Popis výsledku anglicky

Bremia lactucae is a devastating pathogen causing heavy yield losses in lettuce production worldwide. Long time it was thought to infect various members of the Asteraceae but recent phylogenetic investigations revealed that B. lactucae is restricted to cultivated Lactuca sativa and its wild progenitor Lactucaserriola. Many resistance genes in cultivated lettuce were crossbred from L. serriola, but often a fast overcoming of the resistance in the crop by new downy mildew races was observed. Consequently, it seems important to investigate the population genetic relationships of wild prickly lettuce and cultivated lettuce, in order to determine, if the Bremia lineages infecting these hosts are distinct or intermingled. In the first case, searching for resistance in prickly lettuce is straightforward, in the second case it would rather be futile. Bremia belongs to the genera of downy mildews with pyriform haustoria, which feature highly variable ITSrepeats that can be used as high-resolution markers for population genetics studies. Here we report that Bremia lactucae on Lactuca sativa is not homogeneous but emerged from several host shifts from Lactuca serriola and that Bremia accessions from both species are not forming distinct genepools. While the pathogen population from L. serriola showed a balanced pattern, the pathogen population from L. sativa has a directional selection pattern reflecting founder effects after host shifts, resulting in a fast colonisation of susceptible lettuce cultivars. Thus, the wild population of Bremia lactucae seems to play a major role in the epidemiology of downy mildew on cultivated lettuce. This also explains, why resistance breeding using resistance genes from prickly lettuce had little success for achieving durable resistance in cultivated lettuce and calls for both more detailed research into Bremia on wild lettuce and new breeding strategies using less closely related lettuce species.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Journal of Plant Pathology

ISSN

0929-1873

e-ISSN

—

Svazek periodika

161

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

411-426

Kód UT WoS článku

000673004600001

EID výsledku v databázi Scopus

2-s2.0-85110440884