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The germplasm release of M-62774 and M-62805, two potato clones with cold-sweetening resistance

Leszek Domański*, Ewa Zimnoch-Guzowska*, Maria Domańska*, Kazimiera Zgórska**,
Małgorzata Paczkowska***

***Plant Breeding and Acclimatization Institute (IHAR)
***Młochów Research Center
***05-831 Młochów, Poland
***IHAR, Jadwisin Research Center
***05-140 Serock, Poland
***National Food and Nutrition Institute
***61/63 Powsińska, 02-903 Warszawa, Poland
***e-mail: mlochow@ihar.edu.pl

Two potato parental lines that have been released by the Plant Breeding and Acclimatization Institute, Młochów Research Center in 2002 are outstanding in cold-sweetening resistance. Both clones M-62774 and M-62805 showed low accumulation of reducing sugars in tubers directly after storage for 4 months at 4°C. They had medium to high yielding ability, satisfactory tuber appearance, increased starch content and high resistance to potato virus Y. M-62774 had light chip colour and good stability of this trait over four years at three storage treatments (8°C, 4°C, 4°C + reconditioning), while M-62805 was capable of producing regularly light coloured chips after storage at: 8°C and at 4°C followed by two-week reconditioning at 19°C. Both clones are male and female fertile and have been successfully used in crossing programme.

Domański L., Zimnoch-Guzowska E., Domańska M., Zgórska K., Paczkowska M., 2004. The germplasm release of M-62774 and M-62805, two potato clones with cold-sweetening resistance. Folia Horticulturae 16/2: 33-40.