Changes in Virulence Frequencies and Higher Fitness of Simple Pathotypes in the Czech Population of Blumeria graminis f.sp hordei

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25328859%3A_____%2F15%3A%230000830" target="_blank" >RIV/25328859:_____/15:#0000830 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.agriculturejournals.cz/publicFiles/149550.pdf" target="_blank" >http://www.agriculturejournals.cz/publicFiles/149550.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17221/96/2014-PPS" target="_blank" >10.17221/96/2014-PPS</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Changes in Virulence Frequencies and Higher Fitness of Simple Pathotypes in the Czech Population of Blumeria graminis f.sp hordei

Popis výsledku v původním jazyce

The employment of specific genes, which determine host resistance to avirulent pathotypes of the pathogen, is not recommended for protecting barley against powdery mildew (Blumeria graminis f.sp. hordei). However, most barley varieties still possess specific resistance genes to this pathogen. The effectiveness of such resistances was determined by assessing virulence frequency using randomly collected Czech population samples of 521 pathogen isolates from the air tested on 29 barley differential varieties over a four-year period. Most virulence frequencies did not show major changes, but the frequencies on the winter cv. Laverda and the spring cv. Kangoo greatly increased. The highest virulence frequency in all four years was on the resistance Ru2 in Kompolti 4. The period of sampling the air population and associated changes in the proportion of spores that developed on spring and winter varieties with different resistances are one of causes of the changes in virulence frequencies. It was also found out that the virulence complexity of pathotypes with the frequency > 1 was markedly lower than the complexity of pathotypes with the frequency of 1. This could indicate the higher fitness of pathotypes with fewer virulences.

Název v anglickém jazyce

Changes in Virulence Frequencies and Higher Fitness of Simple Pathotypes in the Czech Population of Blumeria graminis f.sp hordei

Popis výsledku anglicky

The employment of specific genes, which determine host resistance to avirulent pathotypes of the pathogen, is not recommended for protecting barley against powdery mildew (Blumeria graminis f.sp. hordei). However, most barley varieties still possess specific resistance genes to this pathogen. The effectiveness of such resistances was determined by assessing virulence frequency using randomly collected Czech population samples of 521 pathogen isolates from the air tested on 29 barley differential varieties over a four-year period. Most virulence frequencies did not show major changes, but the frequencies on the winter cv. Laverda and the spring cv. Kangoo greatly increased. The highest virulence frequency in all four years was on the resistance Ru2 in Kompolti 4. The period of sampling the air population and associated changes in the proportion of spores that developed on spring and winter varieties with different resistances are one of causes of the changes in virulence frequencies. It was also found out that the virulence complexity of pathotypes with the frequency > 1 was markedly lower than the complexity of pathotypes with the frequency of 1. This could indicate the higher fitness of pathotypes with fewer virulences.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GF - Choroby, škůdci, plevely a ochrana rostlin

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

PLANT PROTECTION SCIENCE

ISSN

1212-2580

e-ISSN

—

Svazek periodika

51

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

7

Strana od-do

67-73

Kód UT WoS článku

000354769600003

EID výsledku v databázi Scopus

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