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Genetic basis of control of Rhynchosporium secalis infection and symptom expression in barley
Ist Teil von
Euphytica, 2012-03, Vol.184 (1), p.47-56
Ort / Verlag
Dordrecht: Springer Netherlands
Erscheinungsjahr
2012
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
The genetic basis of several different components of resistance to
Rhynchosporium secalis
in barley was investigated in a mapping population derived from a cross between winter and spring barley types. Both the severity of visual disease symptoms and amount of
R. secalis
DNA in leaf tissues were assessed in field trials in Scotland in the 2007/2008 and 2008/2009 growing seasons. Relative expression of symptoms was defined as the residual values from a linear regression of amount of
R. secalis
DNA against visual plot disease score at GS 50. Amount of
R. secalis
DNA and visual disease score were highly correlated traits and identified nearly identical QTL. The genetic control of relative expression of symptoms was less clear. However, a QTL on chromosome 7H was identified as having a significant effect on the expression of visual disease symptoms relative to overall amount of
R. secalis
colonisation.