FIRST EVALUATION OF APPLE MUTANTS INDUCED BY GAMMA RAY TREATMENTS

In 1972 and 1973 in cooperation with ENEA (Casaccia-Roma) 2758 dormant buds of nine apple varieties (Early Red Stayman, Jerseymac, Jonathan sel. 2 Cooper, Missouri A2071, Mollie’s Delicious, Neipling Early Stayman, Ozark Gold, Smoothee, Vistabella) were irradiated with gamma rays ⁶⁰Co 5–6kR.

Mutants were selected in the second vegetative propagation (V₂) of the irradiated buds.

The most interesting mutants are: 6 for compact tree growth (4 of Mollie’s Delicious, 1 of Early Red Stayman, and 1 of Missuori A2071) and 1 for high skin color (Neipling Early Stayman). Seven out of twelve mutants of Mollie’s Delicious evaluated for red skin color resulted to be more colored than the control.

Conference on Temperate Tree Fruits and Nuts Breeding

W. Faedi, P. Rosati

https://doi.org/10.17660/ActaHortic.1985.159.6