Natural hybridization and genome size

BUREŠ, Petr, Lucie HOROVÁ, Klára HELÁNOVÁ and Petr ŠMARDA. Natural hybridization and genome size. In International conference on polyploidy, hybridization and biodiversity. Program and abstracts. 2009.

Basic information

• Original name: Natural hybridization and genome size
• Name in Czech: Přirozaná hybridizace a velikost genomu
• Authors: BUREŠ, Petr (203 Czech Republic, guarantor, belonging to the institution), Lucie HOROVÁ (203 Czech Republic, belonging to the institution), Klára HELÁNOVÁ (203 Czech Republic) and Petr ŠMARDA (203 Czech Republic, belonging to the institution).
• Edition: International conference on polyploidy, hybridization and biodiversity. Program and abstracts. 2009.

Other information

• Original language: English
• Type of outcome: Conference abstract
• Field of Study: 10600 1.6 Biological sciences
• Country of publisher: France
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/09:00029963
• Organization unit: Faculty of Science
• Keywords (in Czech): Cirsium; obsah DNA; Epilobium; mezidruhoví hybridi
• Keywords in English: Cirsium; DNA-content; Epilobium; interspecific hybrids
• Tags: International impact

Abstract

The frequency of spontaneous hybrids is non-randomly distributed among plant taxa: while some genera or families contain large numbers of hybrids, the majority contain none. Relationship was found between hybrid promiscuity and genome size in Cirsium: species with smaller genomes hybridize frequently, while those with larger genomes produce few or no hybrids. Moreover, negative correlation between the frequency of natural hybridization and the genome size difference between parental taxa was documented in the most commonly hybridizing Cirsium species pairs. A similar relation was found in Epilobium. We tested the general model "the higher frequency of hybridization, the smaller genomes" on complete datasets about vascular floras of Great Britain, Germany, and the Czech Republic. The correlation between the average genome size and hybrid promiscuity (counted as number of hybrids / number of species within a particular genus or family) was confirmed both on generic and family.

Abstract (in Czech)

Frekvence spontánní hybridizace není náhodně rozložena napříč rostlinami: zatímco jen některé rody nebo čeledi obsahují mnoho hybridů, většina ostatních neobsahuje žádné. Vztah mezi velikostí genomu a hybridní promiskuitou byl nalezen u rodu Cirsium: druhy s menším genomem hybridizují častěji, zatímco ty s genomy velkými tvoří hybridy vzácněji nebo vůbec. Podobně to bylo prokázáno u druhů a hybridů v rodu Epilobium. Dále jsme testovali obecný model "vyšší frekvence spontánní hybridizace souvisí s menšími genomy" na kompletních datech o druzích a hybridech ve Velké Británii, Německu a České republice. Korelace mezi průměrnou velikostí genomu a hybridní promiskuitou (vyjádřenou jako počet hybridů dělený počtem druhů v rámci rodu resp. čeledi) byla potvrzena jak na úrovni rodu tak i čeledi.

Links

• GA206/07/0859, research and development project: Name: Eko-geografická a genetická limitace intenzity přirozené mezidruhové hybridizace

Investor: Czech Science Foundation, Eco-geographical and genetic limitation of natural hybridization intensity

• 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