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Mapping of a QTL for oleic acid concentration in spring turnip rape (Brassica rapa ssp. oleifera)

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Abstract

Bulk segregant analysis was used to search for RAPD (random amplified polymorphic DNA) markers linked to gene(s) affecting oleic acid concentration in an F2 population from the Brassica rapa ssp. oleifera cross Jo4002 x a high oleic acid individual from line Jo4072. Eight primers (=8 markers) out of 104 discriminated the ‘high’ and ‘low’ bulks consisting of extreme individuals from the oleic acid distribution. These markers were analysed throughout the entire F2 population, and their association with oleic acid was studied using both interval mapping and ANOVA analysis. Six of the markers mapped to one linkage group. A quantitative trait locus (QTL) affecting oleic acid concentration was found to reside within this linkage group with a LOD score >15. The most suitable marker for oleic acid content is OPH-17, a codominant marker close (<4cM) to the QTL. The mean seed oleic acid content in the F2 individuals carrying the larger allele of this marker was 80.14±9.76%; in individuals with the smaller allele, 54.53±6.83%; in the heterozygotes, 65.47±8.15%. To increase reproducibility, the RAPD marker was converted into a SCAR (sequence characterized amplied region) marker with specific primers. Marker OPH-17 can be used to select spring turnip rape individuals with the desired oleic acid content.

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Authors and Affiliations

  1. Agricultural Research Centre of Finland, Plant Breeding Section, Institute of Crop and Soil Science, FIN-31600, Jokioinen, Finland

    P. K. Tanhuanpää

  2. Boreal Plant Breeding, FIN-31600, Jokioinen, Finland

    J. P. Vilkki

  3. Agricultural Research Centre of Finland, Animal Breeding, Institute of Animal Production, FIN-31600, Jokioinen, Finland

    H. J. Vilkki

Authors
  1. P. K. Tanhuanpää
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  2. J. P. Vilkki
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  3. H. J. Vilkki
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Communicated by M. Koornneef

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Tanhuanpää, P.K., Vilkki, J.P. & Vilkki, H.J. Mapping of a QTL for oleic acid concentration in spring turnip rape (Brassica rapa ssp. oleifera). Theoret. Appl. Genetics 92, 952–956 (1996). https://doi.org/10.1007/BF00224034

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  • DOI: https://doi.org/10.1007/BF00224034

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