Karyological studies inVicia amphicarpa sensu lato

[摘要] Cytological studies were carried out on twenty four amphicarpic wild populations of Viciasativagroup from different sites (19 from Spain, 4 from Syria and 1 from Turkey). Morphologically, 19 accessions can be attributed to taxon Dorthes and 5 toV. angustifoliasubsp.pseudoangustifolia(Rouy) Tardío,comb. nov.In our studies, these two taxa show different chromosome numbers, V.amphicarpaDorthes, has 14 chromosomes, while V.angustifoliasubsp.pseudoangustifoliahas only 12. Furthermore, the form of the chromosomes in the karyotypes of both taxa is quite different. The chromosome number and the morphology of the karyotype found in the first taxon agree with most of previous reports onV. amphicarpa , with a very characteristic short metacentric and six acrocentric chromosomes, one of them satellited. However, the second taxon has a very different karyotype with three large chromosomes, one of them submetacentric and another satellited, plus another three chromosomes which are significantly smaller. Therefore, we can conclude that within the genusVicia , at least two amphicarpic taxa exist, clearly differentiated, both in morphological and karyotypical characteristics.

[学科分类] 植物学

[关键词] Vicia amphicarpa;V. angustifolia;V. sativa;karyotypes;taxonomy