Variability of properties of promising apple selections of the ‘Jonathan’ group
2012
Apple (Malus × domestica Borkh.) is economically the most important species
of genus Malus Miller. Developing new apple genotypes is carried out on a
large scale in many scientific institutes throughout the world. ‘Jonathan’ is
one of four cultivars which have been used as the most frequent progenitors
in apple breeding programmes worldwide. The paper presents six promising
apple selections bred at Fruit Research Institute, and ‘Jonathan’ as the
parental cultivar. The assessed selections derived from the crosses
‘Jonathan’ × ‘Idared’ (J/3/60 and J/2/53), [‘Jonathan’ × J/54/53/59] ×
J/27/127/62 (J/4/106) and ‘Jonathan’ × J/54/53/59 (J/1/55, J/1/71 and
J/1/15). Major phenological properties (flowering phenophase and harvest
time), cropping and pomological properties (morphometrical and chemical
characteristics of fruits) were assessed. The highest fruit weight (J/2/53;
188.4 g) and yield per unit area (J/3/60; 34 t ha-1) were reported in
selections derived from the cross ‘Jonathan’ × ‘Idared’. Selections raised
from a cross between ‘Jonathan’ and J/54/53/59 have high quality fruits. The
highest soluble solids content was found in J/1/55 (15.3%), while the highest
total sugars and acids content was evidenced in J/1/71 (9.61%; 1.46%,
respectively).
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