On the genome constitution and evolution of intermediate wheatgrass (Thinopyrum intermedium: Poaceae, Triticeae)

0369123 - BÚ 2012 RIV GB eng J - Journal Article
Mahelka, Václav - Kopecký, David - Paštová, Ladislava
On the genome constitution and evolution of intermediate wheatgrass (Thinopyrum intermedium: Poaceae, Triticeae).
BMC Evolutionary Biology. Roč. 11, č. 127 (2011), s. 1-17. ISSN 1471-2148. E-ISSN 1471-2148
R&D Projects: GA ČR GP206/09/P312; GA ČR GA206/09/1126
Institutional research plan: CEZ:AV0Z60050516; CEZ:AV0Z50380511
Keywords : Thinopyrum intermedium * polyplidization * hybridization
Subject RIV: EF - Botanics
Impact factor: 3.521, year: 2011

The wheat tribe Triticeae (Poaceae) is a diverse group of grasses representing a textbook example of reticulate evolution. Apart from globally important grain crops, there are also wild grasses which are of great practical value. Allohexaploid intermediate wheatgrass, Thinopyrum intermedium (2n = 6x = 42), possesses many desirable agronomic traits that make it an invaluable source of genetic material useful in wheat improvement. Although the identification of its genomic components has been the object of considerable investigation, the complete genomic constitution and its potential variability are still being unravelled. To identify the genomic constitution of this allohexaploid, four accessions of intermediate wheatgrass from its native area were analysed by sequencing of chloroplast trnL-F and partial nuclear GBSSI, and genomic in situ hybridization. The results confirmed the allopolyploid origin of Thinopyrum intermedium and revealed new aspects in its genomic composition.
Permanent Link: http://hdl.handle.net/11104/0006735