Satellite Symposium 5: Molecular Breeding
Description
The section Phleum of the genus Phleum contains 3 species groups and, depending on the taxonomic classification used, these may be treated as 3 or 6 individual species (Joachimiak & Kula, 1997; Joachimiak, 2004). Firstly, there is the P. pratense group consisting of a series of diploid, tetraploid, hexaploid and octoploid forms. The diploid (2n=14) is usually known as Phleum bertolonii (syn. P. pratense spp bertolonii: syn P. nodosum) and/or P. hubbardii, while the tetraploid, hexaploid and octoploid are known as P. pratense. Secondly there is the P. alpinum group consisting of 2 contrasting diploid species, P. rhaeticum and P. commutatum, and a tetraploid P. commutatum. Finally there is the lesser known Mediterranean annual, Phleum echinatum, with a reduced chromosome number of 10.
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Tracing the Origins of Timothy Species (Phleum Sp.)
The section Phleum of the genus Phleum contains 3 species groups and, depending on the taxonomic classification used, these may be treated as 3 or 6 individual species (Joachimiak & Kula, 1997; Joachimiak, 2004). Firstly, there is the P. pratense group consisting of a series of diploid, tetraploid, hexaploid and octoploid forms. The diploid (2n=14) is usually known as Phleum bertolonii (syn. P. pratense spp bertolonii: syn P. nodosum) and/or P. hubbardii, while the tetraploid, hexaploid and octoploid are known as P. pratense. Secondly there is the P. alpinum group consisting of 2 contrasting diploid species, P. rhaeticum and P. commutatum, and a tetraploid P. commutatum. Finally there is the lesser known Mediterranean annual, Phleum echinatum, with a reduced chromosome number of 10.
