Data/hora: 10/06/2024 16:14:54

Provedor de dados: | 74
País: | Brazil
Título: | Genetic diversity in a world germplasm collection of tall fescue
Autores: | Cuyeu,Romina; Rosso,Beatriz; Pagano,Elba; Soto,Gabriela; Fox,Romina; Ayub,Nicolás Daniel.
Data: | 2013-01-01
Ano: | 2013
Palavras-chave: | SSR markers; Genetic diversity; Flow cytometry; Tall fescue; Genetic resources.
Resumo: | Festuca arundinacea Schreb., commonly known as tall fescue, is a major forage crop in temperate regions. Recently, a molecular analysis of different accessions of a world germplasm collection of tall fescue has demonstrated that it contains different species from the genus Festuca and allowed their rapid classification into the three major morphotypes (Continental, Mediterranean and Rhizomatous). In this study, we explored the genetic diversity of 161 accessions of Festuca species from 29 countries, including 28 accessions of INTA (Argentina), by analyzing 15 polymorphic SSR markers by capillary electrophoresis. These molecular markers allowed us to detect a total of 214 alleles. The number of alleles per locus varied between 5 and 24, and the values of polymorphic information content ranged from 0.627 to 0.840. In addition, the accessions analyzed by flow cytometry showed different ploidy levels (diploid, tetraploid, hexaploid and octaploid), placing in evidence that the world germplasm collection consisted of multiple species, as previously suggested. Interestingly, almost all accessions of INTA germplasm collection were true hexaploid tall fescue, belonging to two eco-geographic races (Continental and Mediterranean). Finally, the data presented revealed an ample genetic diversity of tall fescue showing the importance of preserving the INTA collection for future breeding programs.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000200014
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572013005000021
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.36 n.2 2013
Fonte: | info:eu-repo/semantics/openAccess