Vitis versus Erysiphe necator - Hybridisation potential of Vitis spp. for powdery mildew resistance

Evenhuis, Bob Leon (2021) Vitis versus Erysiphe necator - Hybridisation potential of Vitis spp. for powdery mildew resistance. Bachelor's Thesis, Biology.

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Abstract

The Eurasian grapevine, Vitis vinifera, is highly susceptible to the grapevine powdery mildew (PM), Erysiphe necator. Infection decreases yield and fruit quality. Therefore, enormous amounts of fungicides are used annually. Even though, vineyards only make up 3 percent of European agricultural land, two thirds of the total fungicide usage of the EU is applied in these vineyards. This is detrimental for the environment, brings enormous cost to farmers and is also harmful for farmworkers. It is therefore paramount to breed new grape varieties that combine the fruit qualities of V. vinifera with resistance to powdery mildew. In Chapter 1 the biology of the grapevine adapted obligate biotroph powdery mildew E. necator is discussed. Chapter 2 discusses nonhost resistance (NHR) and more specifically NHR in grapevines. NHR is based on recognising pathogen associated molecular patterns (PAMPs) with extracellular receptors, which will lead to PAMP triggered immunity (PTI). Chapter 3 discusses host resistance (HR) and various Vitis species that are able to employ HR. HR works specifically against E. necator, which uses grapevines as its host. HR is based on recognising pathogen virulence factors, called effectors, by intracellular R-proteins, which leads to effector triggered immunity (ETI). Chapter 4 discusses the recomendations on hybridisation of Vitis species with V. vinifera to get PM resistant varieties.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Elzenga, J.T.M.
Degree programme:	Biology
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	19 Jul 2022 09:55
Last Modified:	19 Jul 2022 09:55
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/28012

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