CHARACTERISTICS IMPORTANT FOR ORGANIC BREEDING OF VEGETABLE CROPS - Organic Agricultural Practices - page 214

probably, in organic production will be developed the three-line
(TC) and four-line (DC), and not the two-line hybrids that domi-
nate in the conventional production.
4. The application of the cytoplasmic male sterile products is banned,
except if the fertility is permanently restored and it continues in
further generations of propagation.
5. Neither direct nor indirect application of the genetic material that
contains induced mutations is permitted.
6. The application of silver nitrate, silver thiosulfate, synthetic hor-
mones, antibiotics and colchicines is banned in organic plant
breeding (BERENJI, 2008).
10.3 RESULTS ACHIEVED IN THE DEVELOPMENT OF VEGETABLE
VARIETIES FOR SPECIFIC PURPOSES
10.3.1 CUCUMBER SELECTION
Cucumbers belong to leading species in the vegetable production in Yugo-
slavia. Continuous dissemination of its breeding range has been possible
due to multiple usage and wide agro-ecological adaptability. Besides the
fact that fruits are used in nutrition, both fresh and processed, it is also a
raw material of the pharmaceutical industry.
However, breeding of this crop has been intensifi ed only in recent 30
years in Serbia. Tendency of spreading production and increasing the use
of cucumber in Serbian nutrition requires a wide range of varieties for
pickling and for salad. Therefore, it is necessary to increase the number of
cultivars for market and for consumers. Current trend of cucumber breed-
ing in Serbia is heading towards the selection of genotypes with better
quantitative characteristics. In the fi rst place, these are varieties with non-
bitter fruits, straight shape and with high yield. The exploiting of parthe-
nocarpy of salad type of cucumber is also a current trend. New partheno-
carp cucumber genotypes were intended for production in greenhouses.
Cucumber breeding to resistance to diseases is of great importance
(PAVLOVIC et al., 2002). Downy ( Pseudoperonospora cubensis (Berk
and Curt.) Rostow) and Cucumber Mosaic Virus cause the greatest prob-