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Open Access Karyotype Analysis of Diploid Oat Germplasm Introduced from Canada

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The chromosome karyotype of three diploid oat species was studied with squash method. The results showed that the karyotype formula of Avena strigosa was 2n=2x=14=10m+4sm(2SAT), with metacentric and submetacentric chromosomes,1 pair of satellites on the short arm of the 4th chromosome and 68.17% for the asymmetry index; that of Avena hispanica, was 2n=2x=14=10m+4sm(2SAT), with metacentric and submetacentric chromosomes, 1 pair of satellites on the short arm of the 7th chromosome and 59.31% for the asymmetry index ;and that of Avena brevis was 2n=2x=14=6m+4sm+4st(2SAT), with acrocentric,metacentric and submetacentric chromosomes, 1 pair of satellites on the short arm of the 6th chromosome and 63.91% for the asymmetry index . Although the karyotypes of all three species were 2A type, there was obvious variation in the morphologies of karyotypes of three species, which comparatively indicated that the karyotype of Avena strigosa was more advanced in evolution, followed by Avena brevis and the karyotype of Avena hispanica was more original. This study will be a useful reference for the karyotype analysis and evolutionary analysis of oat germplasm resources.
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Keywords: Avena; Evolution; Karyotype

Document Type: Research Article

Publication date: 15 January 2013

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  • Journal of plant genetic resources is devoted to reporting new and original experimental and theoretical basic research of interest to genetic resources, gene mining, brief information,and germplasm innovation. Manuscripts that are essentially reporting data, applications of data, or reviews of the literature are not suitable for publication in Journal of plant genetic resources.

    Journal of plant genetic resources was founded in 2000 and is sponsored by the institute of crop sciences of chinese academy of agriculture sciences and China association of agricultural science societies. Since 2003, Journal of plant genetic resources has been indexed in China scientific journal database (CSJD), Chinese core journals (selection) database,Chinese science citation database (CSCD), and so on.
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