Tags

Type your tag names separated by a space and hit enter

Characterization of genetic loci conferring adult plant resistance to leaf rust and stripe rust in spring wheat.
Genome. 2006 Aug; 49(8):977-90.G

Abstract

Leaf (brown) and stripe (yellow) rusts, caused by Puccinia triticina and Puccinia striiformis, respectively, are fungal diseases of wheat (Triticum aestivum) that cause significant yield losses annually in many wheat-growing regions of the world. The objectives of our study were to characterize genetic loci associated with resistance to leaf and stripe rusts using molecular markers in a population derived from a cross between the rust-susceptible cultivar 'Avocet S' and the resistant cultivar 'Pavon76'. Using bulked segregant analysis and partial linkage mapping with AFLPs, SSRs and RFLPs, we identified 6 independent loci that contributed to slow rusting or adult plant resistance (APR) to the 2 rust diseases. Using marker information available from existing linkage maps, we have identified additional markers associated with resistance to these 2 diseases and established several linkage groups in the 'Avocet S' x 'Pavon76' population. The putative loci identified on chromosomes 1BL, 4BL, and 6AL influenced resistance to both stripe and leaf rust. The loci on chromosomes 3BS and 6BL had significant effects only on stripe rust, whereas another locus, characterized by AFLP markers, had minor effects on leaf rust only. Data derived from Interval mapping indicated that the loci identified explained 53% of the total phenotypic variation (R2) for stripe rust and 57% for leaf rust averaged across 3 sets of field data. A single chromosome recombinant line population segregating for chromosome 1B was used to map Lr46/Yr29 as a single Mendelian locus. Characterization of slow-rusting genes for leaf and stripe rust in improved wheat germplasm would enable wheat breeders to combine these additional loci with known slow-rusting loci to generate wheat cultivars with higher levels of slow-rusting resistance.

Authors+Show Affiliations

International Maize and Wheat Improvement Center CIMMYT, Apdo-Postal, Mexico. m.william@cgiar.orgNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17036073

Citation

William, H M., et al. "Characterization of Genetic Loci Conferring Adult Plant Resistance to Leaf Rust and Stripe Rust in Spring Wheat." Genome, vol. 49, no. 8, 2006, pp. 977-90.
William HM, Singh RP, Huerta-Espino J, et al. Characterization of genetic loci conferring adult plant resistance to leaf rust and stripe rust in spring wheat. Genome. 2006;49(8):977-90.
William, H. M., Singh, R. P., Huerta-Espino, J., Palacios, G., & Suenaga, K. (2006). Characterization of genetic loci conferring adult plant resistance to leaf rust and stripe rust in spring wheat. Genome, 49(8), 977-90.
William HM, et al. Characterization of Genetic Loci Conferring Adult Plant Resistance to Leaf Rust and Stripe Rust in Spring Wheat. Genome. 2006;49(8):977-90. PubMed PMID: 17036073.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Characterization of genetic loci conferring adult plant resistance to leaf rust and stripe rust in spring wheat. AU - William,H M, AU - Singh,R P, AU - Huerta-Espino,J, AU - Palacios,G, AU - Suenaga,K, PY - 2006/10/13/pubmed PY - 2007/1/26/medline PY - 2006/10/13/entrez SP - 977 EP - 90 JF - Genome JO - Genome VL - 49 IS - 8 N2 - Leaf (brown) and stripe (yellow) rusts, caused by Puccinia triticina and Puccinia striiformis, respectively, are fungal diseases of wheat (Triticum aestivum) that cause significant yield losses annually in many wheat-growing regions of the world. The objectives of our study were to characterize genetic loci associated with resistance to leaf and stripe rusts using molecular markers in a population derived from a cross between the rust-susceptible cultivar 'Avocet S' and the resistant cultivar 'Pavon76'. Using bulked segregant analysis and partial linkage mapping with AFLPs, SSRs and RFLPs, we identified 6 independent loci that contributed to slow rusting or adult plant resistance (APR) to the 2 rust diseases. Using marker information available from existing linkage maps, we have identified additional markers associated with resistance to these 2 diseases and established several linkage groups in the 'Avocet S' x 'Pavon76' population. The putative loci identified on chromosomes 1BL, 4BL, and 6AL influenced resistance to both stripe and leaf rust. The loci on chromosomes 3BS and 6BL had significant effects only on stripe rust, whereas another locus, characterized by AFLP markers, had minor effects on leaf rust only. Data derived from Interval mapping indicated that the loci identified explained 53% of the total phenotypic variation (R2) for stripe rust and 57% for leaf rust averaged across 3 sets of field data. A single chromosome recombinant line population segregating for chromosome 1B was used to map Lr46/Yr29 as a single Mendelian locus. Characterization of slow-rusting genes for leaf and stripe rust in improved wheat germplasm would enable wheat breeders to combine these additional loci with known slow-rusting loci to generate wheat cultivars with higher levels of slow-rusting resistance. SN - 0831-2796 UR - https://www.unboundmedicine.com/medline/citation/17036073/Characterization_of_genetic_loci_conferring_adult_plant_resistance_to_leaf_rust_and_stripe_rust_in_spring_wheat_ L2 - http://www.nrcresearchpress.com/doi/full/10.1139/g06-052?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -