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A new QTL for resistance to Fusarium ear rot in maize

  • Plant Genetics ∙ Short Communication
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Abstract

Understanding the inheritance of resistance to Fusarium ear rot is a basic prerequisite for an efficient resistance breeding in maize. In this study, 250 recombinant inbred lines (RILs) along with their resistant (BT-1) and susceptible (N6) parents were planted in Zhengzhou with three replications in 2007 and 2008. Each line was artificially inoculated using the nail-punch method. Significant genotypic variation in response to Fusarium ear rot was detected in both years. Based on a genetic map containing 207 polymorphic simple sequence repeat (SSR) markers with average genetic distances of 8.83 cM, the ear rot resistance quantitative trait loci (QTL) were analyzed by composite interval mapping with a mixed model (MCIM) across the environments. In total, four QTL were detected on chromosomes 3, 4, 5, and 6. The resistance allele at each of these four QTL was contributed by resistant parent BT-1, and accounted for 2.5–10.2% of the phenotypic variation. However, no significant epistasis interaction effect was detected after a two-dimensional genome scan. Among the four QTL, one QTL with the largest effect on chromosome 4 (bin 4.06) can be suggested to be a new locus for resistance to Fusarium ear rot, which broadens the genetic base for resistance to the disease and can be used for further genetic improvement in maize-breeding programs.

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Acknowledgments

This work was supported by the National Basic Research Program of China (973 Program, 2009CB118400).

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Authors and Affiliations

  1. College of Agronomy, Henan Agricultural University, Zhengzhou, 450002, China

    Zhi-Min Li, Jun-Qiang Ding, Jia-Fa Chen, Xiao-Dong Sun, Wei Chen, Wei-Bin Song, Hua-Fang Dong & Xiao-Dong Dai

  2. College of Life Sciences, Henan Agricultural University, Wenhua Road, Jinshui, 450002, Zhengzhou, China

    Rui-Xia Wang, Zong-Liang Xia & Jian-Yu Wu

Authors
  1. Zhi-Min Li
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  2. Jun-Qiang Ding
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  3. Rui-Xia Wang
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  4. Jia-Fa Chen
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  5. Xiao-Dong Sun
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  6. Wei Chen
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  7. Wei-Bin Song
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  8. Hua-Fang Dong
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  9. Xiao-Dong Dai
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  10. Zong-Liang Xia
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  11. Jian-Yu Wu
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Corresponding author

Correspondence to Jian-Yu Wu.

Additional information

Zhi-Min Li and Jun-Qiang Ding contributed equally to this paper.

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Li, ZM., Ding, JQ., Wang, RX. et al. A new QTL for resistance to Fusarium ear rot in maize. J Appl Genetics 52, 403–406 (2011). https://doi.org/10.1007/s13353-011-0054-0

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  • DOI: https://doi.org/10.1007/s13353-011-0054-0

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