Graham, J., Hackett, C.A., Smith, K., Karley, A., Mitchell, C., Roberts, H. and O'Neill, T.
Annals of Applied Biology 165, 318-328.
||Part of the reason for the under-exploitation of physical resistance traits in
plant breeding is that the genetic basis and heritability of these traits is poorly
characterised, and any associations of particular traits with pest and disease
resistances have yet to be determined. In raspberry, some associations between
cane hairs and resistance to cane diseases. The aim of this work is to examine a
range of traits, including leaf trichomes, leaf density, cane density, bush density,
lateral length and lateral numbers, to determine the heritability and therefore
breeding potential of these traits. The effect of these traits against aphids and
spider mites, two important pests in raspberry, was examined. Chromosomal
regions with candidate genes regulating these traits were identified as the first
step to understanding the genetic control.