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Population genetic structure of Sisyrinchium micranthum Cav. (Iridaceae) in Itapuã State Park, Southern Brazil

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Population genetic structure of Sisyrinchium micranthum Cav. (Iridaceae) in Itapuã State Park, Southern Brazil

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Título Population genetic structure of Sisyrinchium micranthum Cav. (Iridaceae) in Itapuã State Park, Southern Brazil
Autor Tacuatia, Luana Olinda
Eggers, Lilian
Santos, Eliane Kaltchuk dos
Chies, Tatiana Teixeira de Souza
Abstract Sisyrinchium micranthum Cav. is a member of the family Iridaceae, which is distributed over the American continent. In Brazil, this species is found, not only in disturbed areas and coastal regions, but is also very common in urban centers, such as public parks, during the spring. Chromosome counts for North American specimens are 2n = 32 and 2n = 48, whereas in southern Brazil, there is a polyploidy series with three chromosome numbers, 2n = 16, 2n = 32, and 2n = 48. Population analyses using DNA molecular markers are inexistent for this species, in spite of its wide distribution and morphological variation. To study the genetic population structure of S. micranthum, five natural populations were accessed in a conservation park within the Atlantic Rain Forest Biome in southern Brazil. Here, the chromosome numbers 2n = 16 and 2n = 48 had already been described. Molecular analysis showed that the populations are highly structured with low gene flow among them. The population with 2n = 48 was genetically less variable than and distinct from the other populations. Population genetics in relation to cytogenetic data provided new insights regarding the genetic diversification and mating system of S. micranthum.
Contido em Genetics and molecular biology. Vol. 35, n. 1(mar. 2012), p. 99-105
Assunto Genetica vegetal
Iridaceae
[en] Iridaceae
[en] ISSR-PCR
[en] Mating system
[en] Population genetics
[en] Sisyrinchium micranthum
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/108621
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