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Genetic behavior of resistance to the beet cyst nematode (Heterodera schachtii Schm) in radish (Raphanus sativus L.)

Zugehörigkeit
Department of Arid Land Agriculture, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia
Mousa, Magdi A. A.;
GND
1059150301
Zugehörigkeit
Julius Kühn-Institute (JKI), Institute for Breeding Research on Horticultural and Fruit Crops, Germany
Budahn, Holger

The genetic nature of resistance to the beet cyst nematode (BCN) (Heterodera schachtii Schm) in oil radis was investigated. A segregating population consisted of 245 F2 individuals derived from self-pollinated single F1 plant of the radish cross "Pegletta X Siletta nova" was used. Four oil radish populations and one Brassica napus cv. "Madora" as susceptible control were examinated for the resistance to the BCN. The number of cysts found on the root system of radish plants and the attached soil were used for resistance criteria. The results showed that all F1 plants appeared in the resistance parent class, which reflected the dominant behavior of the resistant gene(s). A bimodal distribution was observed for the F2 population. The F2 individuals distributed in two discreet phenotype classes, complying with the assumption of monogenic dominant inheritance of the BCN resistance in oil radish.

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