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Systematics and karyology of the section Phleum in the genus Phleum

100%

Joachimiak A., Kula A.

Journal of Applied Genetics

1997

tom 38

nr 4

The article presents a concise history of systematic studies on taxa included in the section Phleum of the genus Phleum. The authors discuss the results of cytotaxonomic studies within the section which have been conducted so far and their importance for studies of phylogeny of particular species. It is suggested that the section should be divided into five species on the basis of karyosystematic criteria considering the karyotype structure as well as localization of heterochromatin in the genome. The question of origin of two polyploid species (P. commutatum Gaud. and P. pratense L.) is also discussed.

Cytomorphological studies on American and European Phleum commutatum Gaud. [Poaceae]

100%

Kula A., Dudziak B., Sliwinska E., Grabowska-Joachimiak A., Stewart A., Golczyk H., Joachimiak A. J.

Acta Biologica Cracoviensia. Series Botanica

2006

tom 48

nr 1

The morphology, karyotype structure and nuclear DNA amount of European and American representatives of alpine cat's-tail Phleum commutatum Gaud. were analysed. The evolutionary relationships within this group of taxa are discussed. It was shown that the American and European tetraploids are both morphologically and karyologically similar to each other and to the diploid race of this species from the Polish Carpathians. Diploid relatives of tetraploid P. commutatum i.e., P. commutatum (2x) and P. rhaeticum (Humphries) Rauschert, showed intra- and interspecific differences in nuclear 2C DNA values, whereas tetraploids (of both European and American origin) showed highly uniform nuclear DNA amounts. The 2C DNA uniformity and the greater mean size of the basal chromosome set in tetraploid P. commutatum as compared with its diploid relatives suggest that the change in genome size occurred during early evolution of the tetraploid race of P. commutatum, before its migration to America.

Ograniczanie wyników

1 Acta Biologica Cracoviensia. Series Botanica

1 Journal of Applied Genetics

2 Kula A.

1 Dudziak B.

1 Golczyk H.

1 Grabowska-Joachimiak A.

1 Joachimiak A.

1 Joachimiak A. J.

1 Sliwinska E.

1 Stewart A.

1 2006

1 1997

Wyniki wyszukiwania

Systematics and karyology of the section Phleum in the genus Phleum

Cytomorphological studies on American and European Phleum commutatum Gaud. [Poaceae]