GC content, genome size and chromosome size evolution in grasses and other monocots

ŠMARDA, Petr, Petr BUREŠ and Lucie HOROVÁ. GC content, genome size and chromosome size evolution in grasses and other monocots. In The Comparative Biology of the Monocotyledons. 2008. ISBN 978-87-87772-03-7.

Basic information

• Original name: GC content, genome size and chromosome size evolution in grasses and other monocots
• Name in Czech: Evoluce GC obsahu, velikosti genomu a chromosomů u trav a ostatních jednoděložných
• Authors: ŠMARDA, Petr (203 Czech Republic, guarantor, belonging to the institution), Petr BUREŠ (203 Czech Republic, belonging to the institution) and Lucie HOROVÁ (203 Czech Republic, belonging to the institution).
• Edition: The Comparative Biology of the Monocotyledons, 2008.

Other information

• Original language: English
• Type of outcome: Conference abstract
• Field of Study: 10600 1.6 Biological sciences
• Country of publisher: Denmark
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/08:00024945
• Organization unit: Faculty of Science
• ISBN: 978-87-87772-03-7
• Keywords in English: base composition; Festuca; Poaceae; polyploidy
• Tags: base composition, Festuca, Poaceae, polyploidy
• Tags: International impact, Reviewed

Abstract

Compared to other angiosperms, grass genomes (Poaceae) highly vary in base composition and have considerably higher GC (guanine + cytosine) content. The base composition varies generally with the content of various genome components, and with direction of mutational pressure. Both processes may relate to over 60-fold differences in genome and chromosome sizes found in grasses, and to evolutionary success of grasses in various extreme environments. Here we discuss evolutionary consequences of genome size, chromosome size and GC content in Eurasian species of Festuca genus, across subfamilies Pooideae, Bambusoideae and Oryzoideae, and among various monocots families. We show that in addition to conventional genome size data the GC content may represent another usefull character in taxa delimitation and in understanding the long-term processes of genome evolution.

Abstract (in Czech)

Compared to other angiosperms, grass genomes (Poaceae) highly vary in base composition and have considerably higher GC (guanine + cytosine) content. The base composition varies generally with the content of various genome components, and with direction of mutational pressure. Both processes may relate to over 60-fold differences in genome and chromosome sizes found in grasses, and to evolutionary success of grasses in various extreme environments. Here we discuss evolutionary consequences of genome size, chromosome size and GC content in Eurasian species of Festuca genus, across subfamilies Pooideae, Bambusoideae and Oryzoideae, and among various monocots families. We show that in addition to conventional genome size data the GC content may represent another usefull character in taxa delimitation and in understanding the long-term processes of genome evolution.

Links

• GP206/08/P222, research and development project: Name: Evoluce GC obsahu a genomu trav

Investor: Czech Science Foundation, GC content and genome evolution of grasses

• LC06073, research and development project: Name: Centrum pro výzkum biodiverzity

Investor: Ministry of Education, Youth and Sports of the CR, Biodiversity Research Center

• MSM0021622416, plan (intention): Name: Diverzita biotických společenstev a populací: kauzální analýza variability v prostoru a čase

Investor: Ministry of Education, Youth and Sports of the CR, Diversity of Biotic Communities and Populations: Causal Analysis of variation in space and time