HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (23) Citing Articles via Google Scholar Google Scholar Articles by Timmerman-Vaughan, G. M. Articles by Falloon, K. Search for Related Content PubMed Articles by Timmerman-Vaughan, G. M. Articles by Falloon, K. Agricola Articles by Timmerman-Vaughan, G. M. Articles by Falloon, K. Related Collections Other Legumes Cell Biology & Molecular Genetics Crop Genetics

CELL BIOLOGY & MOLECULAR GENETICS

QTL Mapping of Partial Resistance to Field Epidemics of Ascochyta Blight of Pea

^a New Zealand Institute for Crop & Food Research Ltd, P.O. Box 4704, Christchurch, New Zealand
^b New Zealand Plant Breeding Ltd, P.O. Box 19, Lincoln, New Zealand
^c Dep. of Agriculture Western Australia, 3 Baron-Hay Court, South Perth, Western Australia, Australia
^d Ministry for Research, Science and Technology, Wellington, New Zealand

* Corresponding author (timmermang{at}crop.cri.nz)

Ascochyta blight of pea (Pisum sativum L.) is a fungal disease caused by Mycosphaerella pinodes (Berk. & Bloxham) Verstergren, Phoma medicaginis Malbr. & Roum. var. pinodella (L.K. Jones) Boerema, and Ascochyta pisi Lib. that can result in significant reductions to pea yield and quality. To characterize the genetics of resistance and to identify molecular markers for use in plant breeding, quantitative trait loci (QTLs) affecting Ascochyta blight resistance were mapped in F_2:3 and F_2:4 families produced from a cross between resistant breeding line 3148-A88 and susceptible cultivar Rovar. A linkage map containing 96 loci on 11 linkage groups was constructed for 133 families from this cross. Resistance of progeny lines to natural Ascochyta blight epidemics was examined in field trials at Medina, Western Australia, in 1997, 1998, and 1999. Disease severity was assessed on stems, leaves, and pods by means of separate rating scales. Because pea shows increased susceptibility to Ascochyta blight as it matures, plant reproductive stage was assessed at the time of disease scoring in the 1998 and 1999 trials. Thirteen QTLs were detected for Ascochyta blight resistance on seven linkage groups. Eight of these QTLs were detected in multiple environments or by multiple trait scores. One QTL for plant developmental stage was detected. Linkage of Ascochyta blight resistance QTLs to candidate genes including disease response genes and resistance gene analogs and of the QTL for plant reproductive stage to a pea homolog of the Arabidopsis thaliana CONSTANS gene controlling flowering time in response to photoperiod is discussed.

Abbreviations: A88, resistant breeding line 3148-A88 • AFLP, amplified fragment length polymorphism • CIM, composite interval mapping • cM, centimorgan • MAS, marker-assisted selection • QTL, quantitative trait locus/loci • RAPD, random amplified polymorphic DNA • RFLP, restriction fragment length polymorphism • R-gene, disease or pest resistance gene • RGA, resistance gene analog • SCAR, sequence characterized amplified region

This article has been cited by other articles:

				R. X. Zhang and B. D. Gossen Heritability Estimates and Response to Selection for Resistance to Mycosphaerella Blight in Pea Crop Sci., November 7, 2007; 47(6): 2303 - 2307. [Abstract] [Full Text] [PDF]

				R. Zhang, S.-F. Hwang, B. D. Gossen, K.-F. Chang, and G. D. Turnbull A Quantitative Analysis of Resistance to Mycosphaerella Blight in Field Pea Crop Sci., January 22, 2007; 47(1): 162 - 167. [Abstract] [Full Text] [PDF]

				R. Zhang, S.-F. Hwang, K.-F. Chang, B. D. Gossen, S. E. Strelkov, G. D. Turnbull, and S. F. Blade Genetic Resistance to Mycosphaerella pinodes in 558 Field Pea Accessions Crop Sci., October 2, 2006; 46(6): 2409 - 2414. [Abstract] [Full Text] [PDF]

				G. M. Timmerman-Vaughan, A. Mills, C. Whitfield, T. Frew, R. Butler, S. Murray, M. Lakeman, J. McCallum, A. Russell, and D. Wilson Linkage Mapping of QTL for Seed Yield, Yield Components, and Developmental Traits in Pea Crop Sci., May 27, 2005; 45(4): 1336 - 1344. [Abstract] [Full Text] [PDF]

				V. Hecht, F. Foucher, C. Ferrandiz, R. Macknight, C. Navarro, J. Morin, M. E. Vardy, N. Ellis, J. P. Beltran, C. Rameau, et al. Conservation of Arabidopsis Flowering Genes in Model Legumes Plant Physiology, April 1, 2005; 137(4): 1420 - 1434. [Abstract] [Full Text] [PDF]