A karyological study of Trifolium arvense L., T. preslianum Boiss. and T. smyrnaeum Boiss. in Bulgaria

Kolev, D.; Sedmakova Louchanska, E.

Comptes Rendus de l' Academie Agricole Georgi Dimitrov 5(1): 39-43


Accession: 000004199

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T. arvense and T. smyrnaeum have 2n = 2x = 14, and T. preslianum 2n = 2x = 12. Submetacentric chromosomes (sm) are prevalent in T. arvense, while the metacentric chromosome type (m) is predominant in T. smyrnaeum. The symmetry of the caryotype is most marked in T. arvense and least in T. smyrnaeum; T. preslianum occupies an intermediate position.The T. preslianum caryotype is assumed to be derived from the 14-chromosome type on the basis of internal chromosome translocation. Grounds for this suggestion are given by the absence of the short submetacentric chromosome in the T. preslianum caryotype and the presence of a SAT-chromosome absent from the caryotype of the other two species.