University of Hertfordshire

By the same authors

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Effects of Leptosphaeria maculans race structure and fitness cost of virulence on management of phoma stem canker of oilseed rape. / Huang, Yongju; Balesdent, Marie-Helene; Van de Wouw, A. P.; Stonard, Jenna F.; Evans, Neal; West, Jon S.; Rouxel, Thierry; Fitt, Bruce D.L.

2011. 1181-1184 Paper presented at 13th Int Rapeseed Congress, Prague, Czech Republic.

Research output: Contribution to conferencePaper

Harvard

Huang, Y, Balesdent, M-H, Van de Wouw, AP, Stonard, JF, Evans, N, West, JS, Rouxel, T & Fitt, BDL 2011, 'Effects of Leptosphaeria maculans race structure and fitness cost of virulence on management of phoma stem canker of oilseed rape' Paper presented at 13th Int Rapeseed Congress, Prague, Czech Republic, 5/06/11 - 8/06/11, pp. 1181-1184.

APA

Huang, Y., Balesdent, M-H., Van de Wouw, A. P., Stonard, J. F., Evans, N., West, J. S., ... Fitt, B. D. L. (2011). Effects of Leptosphaeria maculans race structure and fitness cost of virulence on management of phoma stem canker of oilseed rape. 1181-1184. Paper presented at 13th Int Rapeseed Congress, Prague, Czech Republic.

Vancouver

Huang Y, Balesdent M-H, Van de Wouw AP, Stonard JF, Evans N, West JS et al. Effects of Leptosphaeria maculans race structure and fitness cost of virulence on management of phoma stem canker of oilseed rape. 2011. Paper presented at 13th Int Rapeseed Congress, Prague, Czech Republic.

Author

Huang, Yongju ; Balesdent, Marie-Helene ; Van de Wouw, A. P. ; Stonard, Jenna F. ; Evans, Neal ; West, Jon S. ; Rouxel, Thierry ; Fitt, Bruce D.L. / Effects of Leptosphaeria maculans race structure and fitness cost of virulence on management of phoma stem canker of oilseed rape. Paper presented at 13th Int Rapeseed Congress, Prague, Czech Republic.

Bibtex

@conference{1d2c51d34b9b4a10b05a82358aba114f,
title = "Effects of Leptosphaeria maculans race structure and fitness cost of virulence on management of phoma stem canker of oilseed rape",
abstract = "Fitness of virulent (avrLm1 and avrLm4) or avirulent (AvrLm1 and AvrLm4) isolates of Leptosphaeria maculans on Brassica napus without the corresponding resistance genes Rlm1 and Rlm4 was investigated in controlled environment (CE) and field experiments. Results indicate that there is a measurable fitness cost for virulent isolates compared to avirulent isolates in terms of number of lesions, size of lesions, distance grown through leaf tissue towards the petiole in CE experiments and in terms of systemic growth from leaf lesions to stems in field experiments. There were differences between the AvrLm1 and AvrLm4 loci in fitness cost. The optimal temperature for leaf infection was higher for AvrLm4 isolates than for AvrLm1 isolates. There was a cultivar effect on fitness cost of virulence at the AvrLm1 locus but not at the AvrLm4 locus. Results from field experiments suggest that on the same host without the corresponding Rlm1 and Rlm4 genes, AvrLm4 isolates were more fit than AvrLm1 isolates in warmer growing seasons. The fitness cost of virulence at the AvrLm1 locus was generally smaller than that at the AvrLm4 locus, suggesting that the corresponding resistance gene Rlm4 is more durable than Rlm1. Frequencies of avirulent AvrLm1 and AvrLm6 alleles in airborne inoculum for 2006/07, 2007/08 and 2008/09 growing seasons in the UK were investigated using quantitative PCR. There were differences in frequencies of AvrLm1 and AvrLm6 alleles in the three seasons. The detection of changes in frequencies of avirulent alleles provides essential information to guide deployment of cultivars with corresponding resistance genes to minimise the risk of breakdown of novel resistance",
author = "Yongju Huang and Marie-Helene Balesdent and {Van de Wouw}, {A. P.} and Stonard, {Jenna F.} and Neal Evans and West, {Jon S.} and Thierry Rouxel and Fitt, {Bruce D.L.}",
year = "2011",
language = "English",
pages = "1181--1184",
note = "13th Int Rapeseed Congress ; Conference date: 05-06-2011 Through 08-06-2011",

}

RIS

TY - CONF

T1 - Effects of Leptosphaeria maculans race structure and fitness cost of virulence on management of phoma stem canker of oilseed rape

AU - Huang, Yongju

AU - Balesdent, Marie-Helene

AU - Van de Wouw, A. P.

AU - Stonard, Jenna F.

AU - Evans, Neal

AU - West, Jon S.

AU - Rouxel, Thierry

AU - Fitt, Bruce D.L.

PY - 2011

Y1 - 2011

N2 - Fitness of virulent (avrLm1 and avrLm4) or avirulent (AvrLm1 and AvrLm4) isolates of Leptosphaeria maculans on Brassica napus without the corresponding resistance genes Rlm1 and Rlm4 was investigated in controlled environment (CE) and field experiments. Results indicate that there is a measurable fitness cost for virulent isolates compared to avirulent isolates in terms of number of lesions, size of lesions, distance grown through leaf tissue towards the petiole in CE experiments and in terms of systemic growth from leaf lesions to stems in field experiments. There were differences between the AvrLm1 and AvrLm4 loci in fitness cost. The optimal temperature for leaf infection was higher for AvrLm4 isolates than for AvrLm1 isolates. There was a cultivar effect on fitness cost of virulence at the AvrLm1 locus but not at the AvrLm4 locus. Results from field experiments suggest that on the same host without the corresponding Rlm1 and Rlm4 genes, AvrLm4 isolates were more fit than AvrLm1 isolates in warmer growing seasons. The fitness cost of virulence at the AvrLm1 locus was generally smaller than that at the AvrLm4 locus, suggesting that the corresponding resistance gene Rlm4 is more durable than Rlm1. Frequencies of avirulent AvrLm1 and AvrLm6 alleles in airborne inoculum for 2006/07, 2007/08 and 2008/09 growing seasons in the UK were investigated using quantitative PCR. There were differences in frequencies of AvrLm1 and AvrLm6 alleles in the three seasons. The detection of changes in frequencies of avirulent alleles provides essential information to guide deployment of cultivars with corresponding resistance genes to minimise the risk of breakdown of novel resistance

AB - Fitness of virulent (avrLm1 and avrLm4) or avirulent (AvrLm1 and AvrLm4) isolates of Leptosphaeria maculans on Brassica napus without the corresponding resistance genes Rlm1 and Rlm4 was investigated in controlled environment (CE) and field experiments. Results indicate that there is a measurable fitness cost for virulent isolates compared to avirulent isolates in terms of number of lesions, size of lesions, distance grown through leaf tissue towards the petiole in CE experiments and in terms of systemic growth from leaf lesions to stems in field experiments. There were differences between the AvrLm1 and AvrLm4 loci in fitness cost. The optimal temperature for leaf infection was higher for AvrLm4 isolates than for AvrLm1 isolates. There was a cultivar effect on fitness cost of virulence at the AvrLm1 locus but not at the AvrLm4 locus. Results from field experiments suggest that on the same host without the corresponding Rlm1 and Rlm4 genes, AvrLm4 isolates were more fit than AvrLm1 isolates in warmer growing seasons. The fitness cost of virulence at the AvrLm1 locus was generally smaller than that at the AvrLm4 locus, suggesting that the corresponding resistance gene Rlm4 is more durable than Rlm1. Frequencies of avirulent AvrLm1 and AvrLm6 alleles in airborne inoculum for 2006/07, 2007/08 and 2008/09 growing seasons in the UK were investigated using quantitative PCR. There were differences in frequencies of AvrLm1 and AvrLm6 alleles in the three seasons. The detection of changes in frequencies of avirulent alleles provides essential information to guide deployment of cultivars with corresponding resistance genes to minimise the risk of breakdown of novel resistance

M3 - Paper

SP - 1181

EP - 1184

ER -