BIOLOGICAL MATERIAL

摘要

The present invention provides a DNA region comprising the Beet Cyst Nematode Resistance Locus, the DNA region additionally comprising at least one DNA sequence S which shows a homology of at least 60% with a DNA sequence S(A) from plant (A) which exhibits nematode resistance, the sequence having been found by genomic subtraction subtracting, from the genome of the resistant plant, the genome of a non-resistant plant (B) of the same species, optionally followed by hybridization of the DNA resulting from the subtraction to DNA from the non-resistant plant (B) and to DNA from a corresponding plant (C) known to be nematode resistant, respectively, and the selection of clones containing DNA sequences from plant (A) which hybridize to DNA from plant (C) and not with DNA from plant (B).