Heritability of powdery mildew and scab resistance within apple progenies
J. Blažek, L. Zelený, J. Křelinováhttps://doi.org/10.17221/130/2015-PPSCitation:Blažek J., Zelený L., Křelinová J. (2016): Heritability of powdery mildew and scab resistance within apple progenies. Plant Protect. Sci., 52: 123-127.
The occurrence of both diseases was evaluated for four years in a selected orchard where 22 different apple progenies, totalling 699 seedlings were planted. During this period, no chemical protection against the diseases was applied in the orchard, and the incidence of the diseases was rated using a 9-point scale (from 9 = not infected to 1 = very highly infected). For the finalisation of the results, each seedling was characterised by the highest rate of infection from all four years of the evaluation. The lowest mean level of mildew infection equal to 7.47 was observed in the progeny of Resista × McIntosh Wijcik. Concerning the scab, the best was the progeny of Resista × Karmína having a rating equal to 8.27. The highest level of segregation of seedlings having joint resistance to both diseases was found out in the progenies obtained by crossings of HL665 × HL782 and Resista × HL447.Keywords:
Malus × domestica; joint resistance; progeny segregation; apple breedingReferences:
Blažek J. (1997): New apple cultivar Angold. Scientific Papers of Pomology, 15: 143–148.Blažek J. (1999): Apple cultivar Resista. Scientific Papers of Pomology, 16: 109–112.Blažek J. (2004): Response to diseases in new apple cultivars from the Czech Republic. Journal of Fruit Ornamental Plant Research, 12 (Special Edition): 241–250.Blažek J., Křelinová J. (2006): Seven-year orchard performance of eleven new apple cultivars from Holovousy in comparison with some commonly grown ones. Horticultural Science (Prague), 33: 131–139.Blažek J., Křelinová J. (2011): Tree growth and some other characteristics of new columnar apple cultivars bred in Holovousy, Czech Republic. Horticultural Science (Prague), 38: 1–10.Bus V. G. M., Alspach P. A., Hofstee M. E., Brewer L. R. (2002): Genetic variability and preliminary heritability estimates of resistance to scab ( Venturia inaequalis ) in an apple genetics population. New Zealand Journal of Crop and Horticultural Science, 30, 83-92 https://doi.org/10.1080/01140671.2002.9514202Bus V.G.M., Basset H.C.N., Bowatle D., Chagné D., Ranatunga C.A., Ulluwshewa D., Wiedow C., Gardiner S.E. (2010): Genome mapping of an apple scab, a powdery mildew and a woolly apple aphid resistance gene from open-pollinated Mildew Immune Selection. Tree Genetics & Genomes, 6: 477–487.Gessler C., Patocchi A., Sansavini S., Tartarini S., Gianfranceschi L. (2006): Venturia inaequalis Resistance in Apple. Critical Reviews in Plant Sciences, 25, 473-503 https://doi.org/10.1080/07352680601015975Hampson C R, Quamme H A, Sholberg P L (2009): A study of scab resistance in 16 apple progenies using parents with partial scab resistance. Canadian Journal of Plant Science, 89, 693-699 https://doi.org/10.4141/CJPS08055Holb I.J. (2009): Fungal disease management in organic apple orchards: Epidemiological aspects and management approaches. Recent Developments in Management of Plant Diseases, 1: 163–177.Janse J., Verhaegh J.J., den Nijs A.M.P. (1994): Early selection for partial resistance to powdery mildew, Podosphaera leucotricha (Ell. et Ev.) Salm. in apple progenies. Developments in Plant Breeding, 1: 13–15.Sestras A.F., Pamfil D., Dan C., Bolboaca S.D., Jäntschi L., Sestras R.E. (2011): Possibilities to improve apple scab (Venturia inaequalis (Cke.) Wint.) and powdery mildew [Podosphaera leucotricha (Ell. et Everh.) Salm.] resistance on apple by increasing genetic diversity using potentials of wild species. Australian Journal of Crop Science, 5: 748–755.Villette I., Lateur M., Lefrancq B., Lepoivre P. (2004): STUDY OF COMPONENTS OF PARTIAL RESISTANCE TO SCAB ON A RANGE OF APPLE CULTIVARS. Acta Horticulturae, , 217-220 https://doi.org/10.17660/ActaHortic.2004.663.33