%0 Journal Article
%T Inheritance of fire blight resistance in Asian <i>Pyrus</i> species
%A Kamila L. Bokszczanin
%A Andrzej A. Przybyla
%A Malgorzata Schollenberger
%A Dariusz Gozdowski
%A Wieslaw Madry
%A Slawomir Odziemkowski
%J Open Journal of Genetics
%P 109-120
%@ 2162-4461
%D 2012
%I Scientific Research Publishing
%R 10.4236/ojgen.2012.22016
%X Since several Asian pear species are considered to be potential source of fire blight resistance, we crossed ¡°Doyenn¨¦ du Comice¡±, the susceptible European cultivar, with four Asian pear species. The aim of the study was to establish the level of resistance of each genotype and the mode of transmission of fire blight resistance to each F<sub>1</sub> full-sib progeny. The best sources of resistance were <i>P. ussuriensis</i> 18 and <i>P. ussuriensis</i> var. <i>ovoidea</i> 8 ranked to resistant and highly resistant, respectively. Although pear resistance to fire blight is suggested to be polygenic, distribution of phenotypes in ¡°Doyenn¨¦ du Comice¡± ¡Á <i>P. ussuriensis</i> var. <i>ovoidea</i> 8 hybrid family suggests the possibility of monogenic inheritance with the dominance of resistance derived from <i>P. ussuriensis</i> var. <i>ovoidea</i> 8. Polygenic inheritance of pear resistance to fire blight was identified in cross combinations of ¡°Doyenn¨¦ du Comice¡± with <i>P. pyrifolia</i> 6, and contributed by the major gene, with <i>P. ussuriensis</i> 18 and <i>P. calleryana</i> 12. Transgressive segregation was observed within the progenies of susceptible, moderately susceptible and resistant parents.
%K ¡°Doyenn&#201
%K Du Comice¡±
%K Asian Pear Species
%K Fire Blight Resistance
%K Pear Interspecific Hybrids
%K Polygenic Resistance
%K Monogenic Resistance
%K Transgression
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=20389