Components of quantitative resistance to leaf rust in wheat cultivars: diversity, variability and specificity

The aim of this study was to investigate the potential diversity and pathogen-specificity of sources of quantitative resistance to leaf rust caused by Puccinia triticina in French wheat germplasm. From a set of 86 genotypes displaying a range of quantitative resistance levels during field epidemics, eight wheat genotypes were selected and challenged in a greenhouse with three isolates of the pathogen, belonging to different pathotypes. Five components of resistance were assessed: infection efficiency, for which an original methodology was developed, latent period, lesion size, spore production per lesion, and spore production per unit of sporulating tissue. High diversity and variability for all these components were expressed in the host × pathotype combinations investigated; isolate-specificity was found for all the components. The host genotypes displayed various resistance profiles, based on both the components affected and the isolate-specificity of the interaction. Their usefulness as sources of quantitative resistance was assessed: line LD7 probably combines diversified mechanisms of resistance, being highly resistant for all the components, but displaying isolate-specificity for all the components; cv. Apache did not show isolate specificity for any of the components, which could be related to the durability of its quantitative resistance in the field over more than 11 years.

[1]  A. Gautier,et al.  Low diversity and fast evolution in the population of Puccinia triticina causing durum wheat leaf rust in France from 1999 to 2009, as revealed by an adapted differential set , 2012 .

[2]  H. Monod,et al.  Influence of cultivated landscape composition on variety resistance: an assessment based on wheat leaf rust epidemics. , 2011, The New phytologist.

[3]  R. Singh,et al.  Global status of wheat leaf rust caused by Puccinia triticina , 2011, Euphytica.

[4]  R. E. Mason,et al.  Race non-specific resistance to rust diseases in CIMMYT spring wheats , 2011, Euphytica.

[5]  D. S. St. Clair,et al.  Quantitative disease resistance and quantitative resistance Loci in breeding. , 2010, Annual review of phytopathology.

[6]  R. Nelson,et al.  Resistance loci affecting distinct stages of fungal pathogenesis: use of introgression lines for QTL mapping and characterization in the maize - Setosphaeria turcica pathosystem , 2010, BMC Plant Biology.

[7]  C. Lannou,et al.  Aggressiveness components and adaptation to a host cultivar in wheat leaf rust. , 2009, Phytopathology.

[8]  C. Lannou,et al.  Aggressiveness and its role in the adaptation of plant pathogens , 2009 .

[9]  T. Marcel,et al.  Nonhost and basal resistance: how to explain specificity? , 2009, The New phytologist.

[10]  Brigitte Courtois,et al.  A genome-wide meta-analysis of rice blast resistance genes and quantitative trait loci provides new insights into partial and complete resistance. , 2008, Molecular plant-microbe interactions : MPMI.

[11]  C. Mundt,et al.  Specificity of incomplete resistance to Mycosphaerella graminicola in wheat. , 2008, Phytopathology.

[12]  T. Marcel,et al.  Isolate specificity of quantitative trait loci for partial resistance of barley to Puccinia hordei confirmed in mapping populations and near-isogenic lines. , 2008, The New phytologist.

[13]  G. Shaner,et al.  Heritability of Latent Period Estimated from Wild-Type and Selected Populations of Puccinia triticina. , 2007, Phytopathology.

[14]  D. Stuthman,et al.  Breeding Crops for Durable Resistance to Disease , 2007 .

[15]  R. Singh,et al.  Evaluation of slow rusting resistance components to leaf rust in CIMMYT durum wheats , 2007, Euphytica.

[16]  C. Mundt,et al.  Pyramiding and dissecting disease resistance QTL to barley stripe rust , 2006, Theoretical and Applied Genetics.

[17]  R. Park,et al.  Distribution of pathotypes with regard to host cultivars in French wheat leaf rust populations. , 2006, Phytopathology.

[18]  C. Bastien,et al.  Genetic architecture of qualitative and quantitative Melampsora larici-populina leaf rust resistance in hybrid poplar: genetic mapping and QTL detection. , 2005, The New phytologist.

[19]  G. Shaner,et al.  Relationship Among Genes Conferring Partial Resistance to Leaf Rust (Puccinia triticina) in Wheat Lines CI 13227 and L-574-1. , 2005, Phytopathology.

[20]  Z. Pretorius,et al.  Components of rust resistance in lentil , 2005, Euphytica.

[21]  C. Lannou,et al.  Wheat Leaf Rust Uredospore Production on Adult Plants: Influence of Leaf Nitrogen Content and Septoria tritici Blotch. , 2004, Phytopathology.

[22]  A. Price,et al.  Quantitative trait loci analysis suggests that partial resistance to rice blast is mostly determined by race–specific interactions , 2004 .

[23]  R. Singh,et al.  Effect of leaf rust resistance gene Lr34 on components of slow rusting at seven growth stages in wheat , 2003, Euphytica.

[24]  J. Parlevliet.  Durability of resistance against fungal, bacterial and viral pathogens; present situation , 2002, Euphytica.

[25]  Karen A. Garrett,et al.  Relevance of integrated disease management to resistance durability , 2002, Euphytica.

[26]  R. Singh,et al.  Characterization of variability and relationships among components of partial resistance to leaf rust in CIMMYT bread wheats , 1991, Theoretical and Applied Genetics.

[27]  C. Denissen.  Influence of race and post infection temperature on two components of partial resistance to wheat leaf rust in seedlings of wheat , 1991, Euphytica.

[28]  L. Broers.  Influence of development stage and host genotype on three components of partial resistance to leaf rust in spring wheat , 1989, Euphytica.

[29]  L. Broers.  Race-specific aspects of partial resistance in wheat to wheat leaf rust, Puccinia recondita f.sp. tritici , 1989, Euphytica.

[30]  J. Parlevliet.  Pleiotropic association of infection frequency and latent period of two barley cultivars partially resistant to barley leaf rust , 1986, Euphytica.

[31]  C. Denissen.  Components of adult plant resistance to leaf rust in wheat , 2004, Euphytica.

[32]  C. Mundt,et al.  Associations and genetics of three components of slow rusting in leaf rust of wheat , 2004, Euphytica.

[33]  D. J. Carlisle,et al.  Foliar aggressiveness of Northern Ireland isolates of Phytophthora infestans on detached leaflets of three potato cultivars , 2002 .

[34]  I. Sache.  Effect of density and age of lesions on sporulation capacity and infection efficiency in wheat leaf rust (Puccinia recondita f.sp. tritici ) , 1997 .

[35]  G. Shaner,et al.  Selection of Populations of Puccinia recondita f. sp. tritici for Shortened Latent Period on a Partially Resistant Wheat Cultivar. , 1997, Phytopathology.

[36]  J. S. Lehman.  Genetic Variation in Latent Period Among Isolates of Puccinia recondita f. sp. tritici on Partially Resistant Wheat Cultivars , 1996 .

[37]  C. Mundt,et al.  Latent period and infection efficiency of Puccinia recondita f. sp. tritici populations isolated from different wheat cultivars , 1991 .

[38]  E. Milus,et al.  Characterization of resistance to leaf rust in Pacific Northwest wheats. , 1980 .

[39]  J. Parlevliet.  Components of Resistance that Reduce the Rate of Epidemic Development , 1979 .

[40]  R. F. Peterson,et al.  A DIAGRAMMATIC SCALE FOR ESTIMATING RUST INTENSITY ON LEAVES AND STEMS OF CEREALS , 1948 .