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Type: Artigo de periódico
Title: Mating Systems Of Psychotria Tenuinervis (rubiaceae): Distance From Anthropogenic And Natural Edges Of Atlantic Forest Fragment.
Author: Ramos, Flavio Nunes
Zucchi, Maria Imaculada
Solferini, Vera Nisaka
Santos, Flavio A M
Abstract: The aim of this study was to determine and compare the mating systems among Psychotria tenuinervis populations at anthropogenic edges, natural edges, and the forest interior using allozyme electrophoresis of naturally pollinated progeny arrays. P. tenuinervis showed low outcrossing rates, varying from 37% to 50% of the mating attributable to outcrossing and 50% to 63% attributable to self-fertilization, in the three habitats. The forest interior had the highest outcrossing rate (t(m) = 0.50 and t(s) = 0.43) among the three habitats. However, there were no differences in either multilocus or single-locus rates among the three habitats, indicating that the contribution of biparental inbreeding to the apparent selfing rate in these populations was very low. The multilocus (t(m)) and single-locus (t(s)) outcrossing rates for the P. tenuinervis in the sample plots within each habitat showed great heterogeneity. In conclusion, edge creation seems not to influence its mating systems. Additionally, although P. tenuinervis is a distylous species, the population's inbreeding can be attributed almost entirely to self-fertilization.
Subject: Atlantic Ocean
Crosses, Genetic
Quantitative Trait Loci
Citation: Biochemical Genetics. v. 46, n. 1-2, p. 88-100, 2008-Feb.
Rights: fechado
Identifier DOI: 10.1007/s10528-007-9132-8
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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