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QTL mapping of resistance to gray leaf spot in maize.
Theor Appl Genet. 2012 Dec; 125(8):1797-808.TA

Abstract

Gray leaf spot (GLS), caused by the causal fungal pathogen Cercospora zeae-maydis, is one of the most serious foliar diseases of maize worldwide. In the current study, a highly resistant inbred line Y32 and a susceptible line Q11 were used to produce segregating populations for both genetic analysis and QTL mapping. The broad-sense heritability (H (2)) for GLS resistance was estimated to be as high as 0.85, indicating that genetic factors played key roles in phenotypic variation. In initial QTL analysis, four QTL, located on chromosomes 1, 2, 5, and 8, were detected to confer GLS resistance. Each QTL could explain 2.53-23.90 % of the total phenotypic variation, predominantly due to additive genetic effects. Two major QTL, qRgls1 and qRgls2 on chromosomes 8 and 5, were consistently detected across different locations and replicates. Compared to the previous results, qRgls2 is located in a 'hotspot' for GLS resistance; while, qRgls1 does not overlap with any other known resistance QTL. Furthermore, the major QTL-qRgls1 was fine-mapped into an interval of 1.4 Mb, flanked by the markers GZ204 and IDP5. The QTL-qRgls1 could enhance the resistance percentages by 19.70-61.28 %, suggesting its usefulness to improve maize resistance to GLS.

Authors+Show Affiliations

National Maize Improvement Center of China, China Agricultural University, 2 West Yuanmingyuan Road, Haidian District, Beijing 100193, People's Republic of China. zhangyan4023@gmail.comNo affiliation info availableNo 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

22903692

Citation

Zhang, Yan, et al. "QTL Mapping of Resistance to Gray Leaf Spot in Maize." TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, vol. 125, no. 8, 2012, pp. 1797-808.
Zhang Y, Xu L, Fan X, et al. QTL mapping of resistance to gray leaf spot in maize. Theor Appl Genet. 2012;125(8):1797-808.
Zhang, Y., Xu, L., Fan, X., Tan, J., Chen, W., & Xu, M. (2012). QTL mapping of resistance to gray leaf spot in maize. TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, 125(8), 1797-808. https://doi.org/10.1007/s00122-012-1954-z
Zhang Y, et al. QTL Mapping of Resistance to Gray Leaf Spot in Maize. Theor Appl Genet. 2012;125(8):1797-808. PubMed PMID: 22903692.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - QTL mapping of resistance to gray leaf spot in maize. AU - Zhang,Yan, AU - Xu,Ling, AU - Fan,Xingming, AU - Tan,Jing, AU - Chen,Wei, AU - Xu,Mingliang, Y1 - 2012/08/18/ PY - 2012/05/14/received PY - 2012/07/21/accepted PY - 2012/8/21/entrez PY - 2012/8/21/pubmed PY - 2013/4/17/medline SP - 1797 EP - 808 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor. Appl. Genet. VL - 125 IS - 8 N2 - Gray leaf spot (GLS), caused by the causal fungal pathogen Cercospora zeae-maydis, is one of the most serious foliar diseases of maize worldwide. In the current study, a highly resistant inbred line Y32 and a susceptible line Q11 were used to produce segregating populations for both genetic analysis and QTL mapping. The broad-sense heritability (H (2)) for GLS resistance was estimated to be as high as 0.85, indicating that genetic factors played key roles in phenotypic variation. In initial QTL analysis, four QTL, located on chromosomes 1, 2, 5, and 8, were detected to confer GLS resistance. Each QTL could explain 2.53-23.90 % of the total phenotypic variation, predominantly due to additive genetic effects. Two major QTL, qRgls1 and qRgls2 on chromosomes 8 and 5, were consistently detected across different locations and replicates. Compared to the previous results, qRgls2 is located in a 'hotspot' for GLS resistance; while, qRgls1 does not overlap with any other known resistance QTL. Furthermore, the major QTL-qRgls1 was fine-mapped into an interval of 1.4 Mb, flanked by the markers GZ204 and IDP5. The QTL-qRgls1 could enhance the resistance percentages by 19.70-61.28 %, suggesting its usefulness to improve maize resistance to GLS. SN - 1432-2242 UR - https://www.unboundmedicine.com/medline/citation/22903692/QTL_mapping_of_resistance_to_gray_leaf_spot_in_maize_ L2 - https://dx.doi.org/10.1007/s00122-012-1954-z DB - PRIME DP - Unbound Medicine ER -