ISBN online: 978-80-7509-952-5 | DOI: 10.11118/978-80-7509-952-5

Metodika časné preselekce šlechtitelských materiálů na odolnost/náchylnost k patogenu Phytophthora infestans

Martin Černý, Marie Greplová, Miroslav Berka, Romana Hampejsová, Břetislav Brzobohatý, Vladislav Klička, Pengxi Wang, Jan Novák

The conventional potato breeding process encompasses stages ranging from the initial crossbreeding to the acquisition of a new cultivar, commonly spanning over ten years. However, this timeframe can significantly extend due to laborious selection, backcrossing, and the elimination of undesirable traits. The aim of this methodology was to expedite the breeding process by early preselecting suitable candidate crosses based on molecular markers and mQTL associated with resistance. This selection, applied to preselected crosses in the fourth year of the breeding cycle, replaces field tests for resistance and reduces the breeding process by at least three years. By utilizing targeted analysis of identified compounds correlating with sensitivity/resistance to the P. infestans pathogen, it is possible to assess breeding material in the initial stages of the breeding process and proactively eliminate highly susceptible genotypes! es or conversely select genotypes with potential for higher resistance to the P. infestans pathogen.

Keywords: breeding, molecular markers of resistance markers, resistance prediction, potato late blight, metabolome, proteome, lipidome

1. edition, online: 2023, publisher: Mendelova univerzita v Brně