Identification and chromosomal location of major genes for resistance to Pyrenophora teres in a doubled-haploid barley population

T. L. Friesen; J. D. Faris; Z. Lai; B. J. Steffenson

doi:10.1139/G06-024

Identification and chromosomal location of major genes for resistance to Pyrenophora teres in a doubled-haploid barley population

T. L. Friesen, J. D. Faris, Z. Lai, B. J. Steffenson

Plant Pathology

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Abstract

Net blotch, caused by Pyrenophora leres, is one of the most economically important diseases of barley worldwide. Here, we used a barley doubled-haploid population derived from the lines SM89010 and Q21861 to identify major quantitative trait loci (QTLs) associated with seedling resistance to P. teres f. teres (net-type net blotch (NTNB)) and P. teres f. maculata (spot-type net blotch (STNB)). A map consisting of simple sequence repeat (SSR) and amplified fragment length polymorphism (AFLP) markers was used to identify chromosome locations of resistance loci. Major QTLs for NTNB and STNB resistance were located on chromosomes 6H and 4H, respectively. The 6H locus (NTNB) accounted for as much as 89% of the disease variation, whereas the 4H locus (STNB resistance) accounted for 64%. The markers closely linked to the resistance gene loci will be useful for marker-assisted selection.

Original language	English (US)
Pages (from-to)	855-859
Number of pages	5
Journal	Genome
Volume	49
Issue number	7
DOIs	https://doi.org/10.1139/G06-024
State	Published - Jul 2006

Keywords

Disease resistance
Drechslera teres
Molecular markers

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title = "Identification and chromosomal location of major genes for resistance to Pyrenophora teres in a doubled-haploid barley population",

abstract = "Net blotch, caused by Pyrenophora leres, is one of the most economically important diseases of barley worldwide. Here, we used a barley doubled-haploid population derived from the lines SM89010 and Q21861 to identify major quantitative trait loci (QTLs) associated with seedling resistance to P. teres f. teres (net-type net blotch (NTNB)) and P. teres f. maculata (spot-type net blotch (STNB)). A map consisting of simple sequence repeat (SSR) and amplified fragment length polymorphism (AFLP) markers was used to identify chromosome locations of resistance loci. Major QTLs for NTNB and STNB resistance were located on chromosomes 6H and 4H, respectively. The 6H locus (NTNB) accounted for as much as 89% of the disease variation, whereas the 4H locus (STNB resistance) accounted for 64%. The markers closely linked to the resistance gene loci will be useful for marker-assisted selection.",

keywords = "Disease resistance, Drechslera teres, Molecular markers",

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AU - Friesen, T. L.

AU - Faris, J. D.

AU - Lai, Z.

AU - Steffenson, B. J.

PY - 2006/7

Y1 - 2006/7

N2 - Net blotch, caused by Pyrenophora leres, is one of the most economically important diseases of barley worldwide. Here, we used a barley doubled-haploid population derived from the lines SM89010 and Q21861 to identify major quantitative trait loci (QTLs) associated with seedling resistance to P. teres f. teres (net-type net blotch (NTNB)) and P. teres f. maculata (spot-type net blotch (STNB)). A map consisting of simple sequence repeat (SSR) and amplified fragment length polymorphism (AFLP) markers was used to identify chromosome locations of resistance loci. Major QTLs for NTNB and STNB resistance were located on chromosomes 6H and 4H, respectively. The 6H locus (NTNB) accounted for as much as 89% of the disease variation, whereas the 4H locus (STNB resistance) accounted for 64%. The markers closely linked to the resistance gene loci will be useful for marker-assisted selection.

AB - Net blotch, caused by Pyrenophora leres, is one of the most economically important diseases of barley worldwide. Here, we used a barley doubled-haploid population derived from the lines SM89010 and Q21861 to identify major quantitative trait loci (QTLs) associated with seedling resistance to P. teres f. teres (net-type net blotch (NTNB)) and P. teres f. maculata (spot-type net blotch (STNB)). A map consisting of simple sequence repeat (SSR) and amplified fragment length polymorphism (AFLP) markers was used to identify chromosome locations of resistance loci. Major QTLs for NTNB and STNB resistance were located on chromosomes 6H and 4H, respectively. The 6H locus (NTNB) accounted for as much as 89% of the disease variation, whereas the 4H locus (STNB resistance) accounted for 64%. The markers closely linked to the resistance gene loci will be useful for marker-assisted selection.

KW - Disease resistance

KW - Drechslera teres

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Identification and chromosomal location of major genes for resistance to Pyrenophora teres in a doubled-haploid barley population

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