Generally, at least five characters were changed by mutagenic action in this mutant line. From a practical breeding point of view all five characters are very useful. The partial out-pollinating which was inherited from the parent variety 'Rena' is a negative character of this mutant line. It is interesting, that the characters changed by mutagen were already detected in the M2 generation and manifested like non-segregating mutations in the next generations. The 'KS-5' mutant line has already been used as a genetic source in the breeding programme in Slovakia.