Tags

Type your tag names separated by a space and hit enter

Quantitative trait loci for adult-plant resistance to Mycosphaerella graminicola in two winter wheat populations.
Phytopathology. 2011 Oct; 101(10):1209-16.P

Abstract

Septoria tritici blotch (STB) is one of the most important leaf spot diseases in wheat worldwide. The goal of this study was to detect chromosomal regions for adult-plant resistance in large winter wheat populations to STB. Inoculation by two isolates with virulence to Stb6 and Stb15, both present in the parents, was performed and STB severity was visually scored plotwise as percent coverage of flag leaves with pycnidia-bearing lesions. 'Florett'/'Biscay' and 'Tuareg'/'Biscay', each comprising a cross of a resistant and a susceptible cultivar, with population sizes of 316 and 269 F(7:8) recombinant inbred lines, respectively, were phenotyped across four and five environments and mapped with amplified fragment length polymorphism, diversity array technology, and simple sequence repeat markers covering polymorphic regions of ≈1,340 centimorgans. Phenotypic data revealed significant (P < 0.01) genotypic differentiation for STB, heading date, and plant height. Entry-mean heritabilities (h(2)) for STB were 0.73 for 'Florett'/'Biscay' and 0.38 for 'Tuareg'/'Biscay'. All correlations between STB and heading date as well as between STB and plant height were low (r = -0.13 to -0.20). In quantitative trait loci (QTL) analysis, nine and six QTL were found for STB ratings explaining, together, 55 and 51% of phenotypic variation in 'Florett'/'Biscay' and 'Tuareg'/'Biscay', respectively. Genotype-environment and QTL-environment interactions had a large impact. Two major QTL were detected consistently across environments on chromosomes 3B and 6D from 'Florett' and chromosomes 4B and 6B from 'Tuareg', each explaining 12 to 17% of normalized adjusted phenotypic variance. These results indicate that adult-plant resistance to STB in both mapping populations was of a quantitative nature.

Authors+Show Affiliations

Universitat Hohenheim, State Plant Breeding Institute, Stuttgart, Germany.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21635143

Citation

Risser, P, et al. "Quantitative Trait Loci for Adult-plant Resistance to Mycosphaerella Graminicola in Two Winter Wheat Populations." Phytopathology, vol. 101, no. 10, 2011, pp. 1209-16.
Risser P, Ebmeyer E, Korzun V, et al. Quantitative trait loci for adult-plant resistance to Mycosphaerella graminicola in two winter wheat populations. Phytopathology. 2011;101(10):1209-16.
Risser, P., Ebmeyer, E., Korzun, V., Hartl, L., & Miedaner, T. (2011). Quantitative trait loci for adult-plant resistance to Mycosphaerella graminicola in two winter wheat populations. Phytopathology, 101(10), 1209-16. https://doi.org/10.1094/PHYTO-08-10-0203
Risser P, et al. Quantitative Trait Loci for Adult-plant Resistance to Mycosphaerella Graminicola in Two Winter Wheat Populations. Phytopathology. 2011;101(10):1209-16. PubMed PMID: 21635143.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Quantitative trait loci for adult-plant resistance to Mycosphaerella graminicola in two winter wheat populations. AU - Risser,P, AU - Ebmeyer,E, AU - Korzun,V, AU - Hartl,L, AU - Miedaner,T, PY - 2011/6/4/entrez PY - 2011/6/4/pubmed PY - 2012/1/20/medline SP - 1209 EP - 16 JF - Phytopathology JO - Phytopathology VL - 101 IS - 10 N2 - Septoria tritici blotch (STB) is one of the most important leaf spot diseases in wheat worldwide. The goal of this study was to detect chromosomal regions for adult-plant resistance in large winter wheat populations to STB. Inoculation by two isolates with virulence to Stb6 and Stb15, both present in the parents, was performed and STB severity was visually scored plotwise as percent coverage of flag leaves with pycnidia-bearing lesions. 'Florett'/'Biscay' and 'Tuareg'/'Biscay', each comprising a cross of a resistant and a susceptible cultivar, with population sizes of 316 and 269 F(7:8) recombinant inbred lines, respectively, were phenotyped across four and five environments and mapped with amplified fragment length polymorphism, diversity array technology, and simple sequence repeat markers covering polymorphic regions of ≈1,340 centimorgans. Phenotypic data revealed significant (P < 0.01) genotypic differentiation for STB, heading date, and plant height. Entry-mean heritabilities (h(2)) for STB were 0.73 for 'Florett'/'Biscay' and 0.38 for 'Tuareg'/'Biscay'. All correlations between STB and heading date as well as between STB and plant height were low (r = -0.13 to -0.20). In quantitative trait loci (QTL) analysis, nine and six QTL were found for STB ratings explaining, together, 55 and 51% of phenotypic variation in 'Florett'/'Biscay' and 'Tuareg'/'Biscay', respectively. Genotype-environment and QTL-environment interactions had a large impact. Two major QTL were detected consistently across environments on chromosomes 3B and 6D from 'Florett' and chromosomes 4B and 6B from 'Tuareg', each explaining 12 to 17% of normalized adjusted phenotypic variance. These results indicate that adult-plant resistance to STB in both mapping populations was of a quantitative nature. SN - 0031-949X UR - https://www.unboundmedicine.com/medline/citation/21635143/Quantitative_trait_loci_for_adult_plant_resistance_to_Mycosphaerella_graminicola_in_two_winter_wheat_populations_ L2 - https://apsjournals.apsnet.org/doi/10.1094/PHYTO-08-10-0203?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -