scholarly journals Analysis of apoplastic proteins expressed during net form net blotch of barley

2020 ◽  
Vol 127 (5) ◽  
pp. 683-694
Author(s):  
Kealan Hassett ◽  
Simon R. Ellwood ◽  
Katherine G. Zulak ◽  
Mariano Jordi Muria-Gonzalez
Keyword(s):  
Net Blotch ◽  
Net Form Net Blotch

Breeding barley for durable resistance to net and spot forms of net blotch

2021 ◽  
pp. 567-586
Author(s):  
Jerome D. Franckowiak ◽  
◽  
Gregory J. Platz ◽  
Keyword(s):  
Population Dynamics ◽  
Molecular Markers ◽  
Durable Resistance ◽  
Pyrenophora Teres ◽  
Net Blotch ◽  
Net Form Net Blotch

This chapter focuses on breeding barley for durable resistance to net and spot forms of net blotch. It starts by reviewing how Pyrenophora teres f. teres can cause net form net blotch. The chapter then goes on to examine the molecular markers that can be identified to provide resistances to net form net blotch. A section on the population dynamics of barley–P. teres f. teres interactions is also provided. The chapter also reviews how breeding crops with specific genes can help to create durable resistance to net form blotch. It moves on to discuss how Pyrenophora teres Drechs. f. maculata can cause spot form net blotch and how identifying specific molecular markers can help provide resistance to this form of net blotch. The chapter concludes by highlighting the importance of combining durable resistance to both forms of net blotch.

Genetic analysis of net form net blotch resistance in barley lines CIho 5791 and Tifang against a global collection of P. teres f. teres isolates

2016 ◽  
Vol 130 (1) ◽  
pp. 163-173 ◽  
Author(s):  
V. M. Koladia ◽  
J. D. Faris ◽  
J. K. Richards ◽  
R. S. Brueggeman ◽  
S. Chao ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Net Blotch ◽  
Net Form Net Blotch

Genome‐Wide Association Mapping of Seedling Net Form Net Blotch Resistance in an Ethiopian and Eritrean Barley Collection

Crop Science ◽  
2019 ◽  
Vol 59 (4) ◽  
pp. 1625-1638 ◽  
Author(s):  
Anil Adhikari ◽  
Brian J. Steffenson ◽  
Madeleine J. Smith ◽  
Ruth Dill‐Macky
Keyword(s):  
Association Mapping ◽  
Genome Wide Association ◽  
Net Blotch ◽  
Genome Wide ◽  
Net Form Net Blotch

scholarly journals Mapping Net Form Net Blotch and Septoria Speckled Leaf Blotch Resistance Loci in Barley

2010 ◽  
Vol 100 (1) ◽  
pp. 80-84 ◽  
Author(s):  
S. St. Pierre ◽  
C. Gustus ◽  
B. Steffenson ◽  
R. Dill-Macky ◽  
K. P. Smith
Keyword(s):  
Phenotypic Variation ◽  
Recombinant Inbred Lines ◽  
Interval Mapping ◽  
Net Blotch ◽  
Upper Midwest ◽  
Breeding Lines ◽  
Leaf Blotch ◽  
Net Form Net Blotch ◽  
Development And Utilization ◽  
Simple Sequence

Septoria speckled leaf blotch (SSLB), caused by Septoria passerinii Sacc., and net form net blotch (NB), caused by Pyrenophora teres f. teres Drechsler, are fungal diseases that decrease the yields of barley in the Upper Midwest. An effective way to manage these diseases is to plant resistant cultivars. To characterize the genetics of resistance to both pathogens, two advanced barley breeding lines, one resistant to NB (M120) and another resistant to SSLB (Sep2-72), were crossed, creating a population of 115 recombinant inbred lines. The two parents and the population were evaluated in three greenhouse seedling assays for each pathogen and for simple-sequence repeat and diversity arrays technology markers. Composite interval mapping revealed two major quantitative trait loci (QTL) associated with NB on chromosome 6H, located in bins 2 and 6. The QTL located in bin 6 explained 19 to 48% of the phenotypic variation and the QTL located in bin 2 explained 25 to 44% of the phenotypic variation. A new locus for resistance to SSLB, Rsp4, was identified on chromosome 6H, located in bins 3 to 4. Mapping these genes in elite breeding germplasm will accelerate the development and utilization of marker-assisted selection to enhance resistance to these diseases.

scholarly journals Virulence Profile and Genetic Structure of a North Dakota Population of Pyrenophora teres f. teres, the Causal Agent of Net Form Net Blotch of Barley

2012 ◽  
Vol 102 (5) ◽  
pp. 539-546 ◽  
Author(s):  
Z. H. Liu ◽  
S. Zhong ◽  
A. K. Stasko ◽  
M. C. Edwards ◽  
T. L. Friesen
Keyword(s):  
North Dakota ◽  
Gene Diversity ◽  
Random Mating ◽  
Common Source ◽  
Pyrenophora Teres ◽  
Net Blotch ◽  
Seedling Resistance ◽  
Wide Range ◽  
Significant Difference ◽  
Net Form Net Blotch

A Pyrenophora teres f. teres population in North Dakota was analyzed for virulence variation and genetic diversity using 75 monospore isolates that were collected across a 4-year period (2004 to 2007) from two North Dakota State University agricultural experiment stations at Fargo and Langdon. Pathogenicity tests by inoculation onto 22 barley differential lines at seedling stage revealed 49 pathotypes, indicating a wide range of pathogenic diversity. Two-way analysis of variance of disease ratings revealed a significant difference in the virulence among isolates and in the resistance among barley lines, as well as in the interactions between the two. ‘CI5791’, ‘Algerian’, and ‘Heartland’ were three barley lines showing a high level of seedling resistance to all North Dakota isolates tested; however, many previously reported resistance genes have been overcome. Forty multilocus genotypes were identified from this set of isolates by genotyping at 13 simple-sequence repeat loci. High percentages of clonal cultures were detected in the samplings from 2005 and 2007 in Fargo and 2005 in Langdon. Using a clone-corrected sample set, the mean gene diversity (h) was estimated to be 0.58, approximately the same for both locations. The calculated Wright's FST value is small (0.11) but was significantly >0, indicating a significant differentiation between the Fargo and Langdon populations. In the gametic disequilibrium test, only 3 of 78 possible pairwise comparisons over all isolates showed significant (P < 0.05) nonrandom association, suggesting a random mating mode. Our results suggest that the populations from the two locations are derived from a common source and undergo frequent recombination. This research provides important information for barley breeders regarding development and deployment of cultivars with resistance to net form net blotch in this region.

Sign in / Sign up

Export Citation Format

Share Document