Summary
Haploid, dihaploid and tetrahaploid rye plants of the variety ‘Petka’ have been produced to establish a homozygous genotype and karyotype. The morphology, karyotypic characteristics and the metaphase I chromosome behaviour are described demonstrating the utility of the material as a universal standard tester in rye cytogenetics. Clones of several ploidy levels are maintained by long-term in vitro sprout culture. They are available for international testing. Sexual propagation of the clones is possible using a heat treatment procedure to break the self-incompatibility of the homozygotes.
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Communicated by P.L. Pfahler
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Schlegel, R., Melz, G. & Nestrowicz, R. A universal reference karyotype in rye, Secale cereale L.. Theoret. Appl. Genetics 74, 820–826 (1987). https://doi.org/10.1007/BF00247563
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DOI: https://doi.org/10.1007/BF00247563