Artículos de revistas
Chromosome Numbers And Karyotypes Of Species Of Vernonia Sect. Lepidaploa (asteraceae: Vernonieae)
Registro en:
Folia Geobotanica. , v. 47, n. 1, p. 93 - 103, 2012.
12119520
10.1007/s12224-011-9103-z
2-s2.0-84858745382
Autor
de Oliveira V.M.
Semir J.
Forni-Martins E.R.
Institución
Resumen
Vernonia is the largest genus of the tribe Vernonieae (Asteraceae) and comprises more than 1,000 species. In the present study we explore chromosome number and karyotype variation of eight species treated within different subsections of the section Vernonia sect. Lepidaploa. We aimed to explore if these data support the recognition of a single large genus (sensu Baker) or favor its splitting into 22 small genera (sensu Robinson). The species were collected in "cerrado", rupicolous and disturbed areas in the states of São Paulo and Minas Gerais, Brazil. Chromosome numbers varied from 2n = 32 to 60. Most chromosomes were small, and the karyotype analysis revealed a predominance of metacentric and some submetacentric chromosomes. The karyotype symmetry in Vernonia was moderate (TF% 32. 2 to 45. 9), with the most symmetrical karyotype observed in V. rubriramea. 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