Genetic basis of control of Rhynchosporium secalis infection and symptom expression in barley

M. E. Looseley; A. C. Newton; Simon D. Atkins; Bruce D.L. Fitt; B. A. Fraaije; W. T. B. Thomas; R. Keith; M. Macaulay; J. Lynott; D. Harrap

doi:10.1007/s10681-011-0485-z

Genetic basis of control of Rhynchosporium secalis infection and symptom expression in barley

M. E. Looseley, A. C. Newton, Simon D. Atkins, Bruce D.L. Fitt, B. A. Fraaije, W. T. B. Thomas, R. Keith, M. Macaulay, J. Lynott, D. Harrap

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Abstract

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

Original language	English
Pages (from-to)	47-56
Journal	Euphytica
Volume	184
Issue number	1
Early online date	19 Jul 2011
DOIs	https://doi.org/10.1007/s10681-011-0485-z
Publication status	Published - 2012

Keywords

asymptomatic colonisation
disease resistance
leaf scald
mapping population
QTL

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10.1007/s10681-011-0485-z

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Original article can be found at http://www.springerlink.com/ Copyright Springer
Accepted author manuscript, 142 KB

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title = "Genetic basis of control of Rhynchosporium secalis infection and symptom expression in barley",

abstract = "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",

keywords = "asymptomatic colonisation, disease resistance, leaf scald, mapping population, QTL",

author = "Looseley, {M. E.} and Newton, {A. C.} and Atkins, {Simon D.} and Fitt, {Bruce D.L.} and Fraaije, {B. A.} and Thomas, {W. T. B.} and R. Keith and M. Macaulay and J. Lynott and D. Harrap",

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AU - Looseley, M. E.

AU - Newton, A. C.

AU - Atkins, Simon D.

AU - Fitt, Bruce D.L.

AU - Fraaije, B. A.

AU - Thomas, W. T. B.

AU - Keith, R.

AU - Macaulay, M.

AU - Lynott, J.

AU - Harrap, D.

PY - 2012

Y1 - 2012

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AB - 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

KW - asymptomatic colonisation

KW - disease resistance

KW - leaf scald

KW - mapping population

KW - QTL

U2 - 10.1007/s10681-011-0485-z

DO - 10.1007/s10681-011-0485-z

M3 - Article

SN - 0014-2336

VL - 184

SP - 47

EP - 56

JO - Euphytica

JF - Euphytica

IS - 1

ER -

Genetic basis of control of Rhynchosporium secalis infection and symptom expression in barley

Abstract

Keywords

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