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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Genome size discriminates between closely related taxa Elytrigia repens and E. intermedia (Poaceae: Triticeae) and their hybrid Překlad názvu Blízce příbuzné druhy Elytrigia repens a E. intermedia (Poaceae: Triticeae) a jejich hybrid se liší velikostí genomu Tvůrce(i) 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, ORCIDZdroj.dok. Folia Geobotanica. - : Springer - ISSN 1211-9520
Roč. 40, - (2005), s. 367-384Poč.str. 18 s. Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova C-value ; chromosome number ; hybridisation Vědní obor RIV EF - Botanika CEP GA206/05/0778 GA ČR - Grantová agentura ČR GD206/03/H137 GA ČR - Grantová agentura ČR CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000233038100005 Anotace 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. Pracoviště Botanický ústav Kontakt 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 Rok sběru 2010
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