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Molecular mapping and identification of QTL's associated to oat crown rust partial resistance

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Summary

Molecular mapping is a promising strategy for studying and understanding traits with complex genetic control, such as partial resistance to oat crown rust. The objectives of this research were to develop molecular maps from the progenies of the cross UFRGS7 (susceptible) × UFRGS910906 (partially resistant) and to identify QTLs (quantitative trait loci) associated to partial resistance to oat crown rust in two generations of that population.DNA of 86 genotypes of the F2 and 90 genotypes of the F6 UFRGS7 × UFRGS910906 population were used to generate AFLP markers. Molecular maps were constructed using Mapmaker Exp. 3.0 and QTLs for partial resistance to oat crown rust were identified with Mapmaker/QTL software. Five hundred and fifty seven markers in the F2 and 243 markers in the F6 generations were identified. The F2 map integrated 250 markers in 37 linkage groups. The F6 map integrated 86 markers in 17 linkage groups.Five QTLs were identified for partial resistance to oat crown rust in the F2 generation and three QTLs in the F6. The QTL identified on F6 through the PaaaMctt340 AFLP marker showed consistency across two environments and two generations (F4 and F6), and appear to have potential for marker-assisted selection in oat.

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Authors and Affiliations

  1. Universidade Estadual do Rio Grande do Sul, Porto Alegre, Brazil

    Marta M. Barbosa

  2. Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    Luiz C. Federizzi

  3. Pioneer Sementes, Passo Fundo, Brazil

    Sandra C. K. Milach

  4. Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    José A. Martinelli & Gladis C. Thomé

Authors
  1. Marta M. Barbosa
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  2. Luiz C. Federizzi
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  3. Sandra C. K. Milach
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  4. José A. Martinelli
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  5. Gladis C. Thomé
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Correspondence to Marta M. Barbosa.

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Barbosa, M.M., Federizzi, L.C., Milach, S.C.K. et al. Molecular mapping and identification of QTL's associated to oat crown rust partial resistance. Euphytica 150, 257–269 (2006). https://doi.org/10.1007/s10681-006-9117-4

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  • DOI: https://doi.org/10.1007/s10681-006-9117-4

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