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Genome size discriminates between closely related taxa Elytrigia repens and E. intermedia (Poaceae: Triticeae) and their hybrid
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SYSNO ASEP 0025628 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Genome size discriminates between closely related taxa Elytrigia repens and E. intermedia (Poaceae: Triticeae) and their hybrid Title Blízce příbuzné druhy Elytrigia repens a E. intermedia (Poaceae: Triticeae) a jejich hybrid se liší velikostí genomu Author(s) Mahelka, Václav (BU-J) RID, ORCID
Suda, Jan (BU-J) RID
Jarolímová, Vlasta (BU-J)
Trávníček, Pavel (BU-J) RID, ORCID
Krahulec, František (BU-J) RID, ORCIDSource Title Folia Geobotanica. - : Springer - ISSN 1211-9520
Roč. 40, - (2005), s. 367-384Number of pages 18 s. Language eng - English Country CZ - Czech Republic Keywords C-value ; chromosome number ; hybridisation Subject RIV EF - Botanics R&D Projects GA206/05/0778 GA ČR - Czech Science Foundation (CSF) GD206/03/H137 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000233038100005 Annotation Flow cytometric and karyological investigations were performed on closely related taxa Elytrigia repens and E. intermedia (Poaceae: Triticeae) from the Czech Republic. DNA-hexaploids clearly prevailed among 238 examined plants and amounted to 96.2% of all samples. 2C-values ± SD for hexaploid Elytrigia repens and E. intermedia were estimated to 23.27 ± 0.20 pg and 27.04 ± 0.24 pg, respectively. Genome size thus allowed reliable separation of both species (difference ca 16%) as well as the discrimination of hybrid individuals. Natural hybridisation in E. repens – intermedia alliance seems to be quite a common phenomenon as indicated from a large proportion (one sixth) of hexaploid samples with intermediate 2C-values. Previously, the crosses were most probably neglected or misidentified due to their weak morphological differentiation. New nonaploid cytotypes (2n=9x=63) were revealed for both species as well as for the hybrids (determined on the basis of morphological characters), representing the first records from the field. Fusion of unreduced and reduced gametes of the hexaploids is the most plausible mode of nonaploid origin. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2010
Number of the records: 1