Relationship Between Fire Blight Resistance and Some Traits in Pear.

Classical and Molecular Approaches to Breeding Fruit and Nut Crops for Disease Resistance

“…Resistance is quantitatively inherited with a narrow sense heritability of 52% and is not associated with poor fruit quality (Bell et al, 1976). Subsequent research in Italy and France has confirmed these results (Bagnara et al, 1993(Bagnara et al, , 1994, and this seems to be the case regardless of the source of resistance (Layne et al, 1968). A few pear genotypes transmit a high degree of susceptibility and are believed to carry a dominant gene for sensitivity (Thompson et al, 1975).…”