Resistance to Phytophthora infestans in diploid and tetraploid potato families. 2. Resistance in tubers

• Authors: M. Swiezynski , B. Flis , M. Osiecka , M.T. Sieczka , H. Zarzycka
• Languages of publication: EN

Abstracts

EN

The tuber reaction to Phytophthora infestans was evaluated in individual genotypes of four diploid and four tetraploid potato families, their parents and standard cultivars. The genotypes were tested several times. Two testing methods were used, based on evaluation of tuber slices or whole tubers, respectively. All inoculations were done with MP 245, a fungus isolate with a broad virulence spectrum. If the reaction of tuber slices was evaluated, the distribution of genotypes in several families deviated considerably from a normal one. In some distributions more than one peak was detectable, indicating segregation of major genes. Genotypes transgressive in resistance were found in four families. If the reaction of whole tubers was evaluated, the distribution of genotypes did not deviate significantly from a normal one. Genotypes transgressive in resistance were found in one family. The tuber reaction to P. infestans depended to a large extent on testing conditions.

Keywords

EN

PHYTOPHTHORA INFESTANS; POTATO; RESISTANCE EVALUATION; TUBER

Discipline

• GENETICS: GENETICS

• Publisher: Institute of Plant Genetics, Polish Academy of Sciences
• Journal: Journal of Applied Genetics
• Year: 1997
• Volume: 38
• Issue: 1
• Pages: 33-44

Contributors

author

M. Swiezynski

author

B. Flis

author

M. Osiecka

author

M.T. Sieczka

author

H. Zarzycka

• Document Type: article
• Publication order reference: K.M.Swierzynski, Institute for Potato Research, Department of Genetics, Mloch?w, 05-832 Rozalin, Poland