The objective of this study was to generate information relative to the allele distribution and dynamics within and among populations of Araucaria angustifolia, a naturally-occurring conifer in the south of Brazil, being known popularly as "pinheiro-do-Paraná", "araucaria" or pine tree. In order to elucidate the levels and the distribution of the genetic variability, the population's genetic structure and the genetic distance among natural populations of this species with different levels of disturbance in different geographical areas were studied in detail. For this, samples of leaf tissue were collected from 328 adult individuals in nine natural populations in Santa Catarina State. To analyze the samples, the allozyme technique was applied in starch gel electrophoresis (penetrose 13%), with citrate/morfholine buffer. Nine enzymatic systems (PGM, PGI MDH, PRX, SKDH, 6PGDH, ACP, IDH and G6PDH) revealed 15 loci. The analysis provided values for H e and H o of 0.084 and 0.072, respectively. The general average of polymorphic loci was 73% in the species and 26.6% in the studied populations and the allele number per locus was 1.6. Wright's F-statistical estimates indicated the existence of inbreeding in populations (F IS = 0.148) and a low divergence among populations (F ST = 0.044). However, the inbreeding values were variable in different populations. Taken together, the results indicated that the greater part of the genetic variability is contained within populations. The working hypothesis that originally there was greater genetic diversity can be supported by these results which indicate that in the degraded populations the diversity indexes are lower in the degraded populations than those found in better-conserved populations. Thus the fragmentation of the forest followed by "araucaria" exploitation could have contributed to the genetic differentiation expressed through the allele frequency of the studied population.

RESUMO Estudos citogenéticos da Maria -RS, during 1996 and 1997. A variation

Este trabalho tem como objetivo investigar como vem sendo discutida a Pedagogia da Alternância nas Licenciaturas em Educação do Campo, nas produções acadêmicas. Para isso, em um primeiro momento, foi realizado um estudo bibliográfico dos históricos das Licenciaturas em Educação do Campo e da Pedagogia da Alternância e, posteriormente, o mapeamento das produções acadêmicas no Banco de Teses e Dissertações da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES). O recurso metodológico utilizado foi a Análise Textual Discursiva (ATD), organizada em três componentes: unitarização, categorização e metatexto. As análises permitiram identificar como vem sendo discutido o Regime de Alternância, nas formações iniciais em Educação do Campo, segundo as produções acadêmicas analisadas. Palavras-chave: Pedagogia da Alternância, Formação Inicial em Educação do Campo, Teoria e prática.   The Pedagogy of Alternation in degree in Rural Education: look at academic productions         ABSTRACT. This article had as objective to investigate how has been discussed the Pedagogy of Alternation in the Degree in Rural Education, in the academic productions. To this end, a bibliographic study was carried out on the history of the Undergraduate Courses in Countryside Education and Pedagogy of Alternation, and later the mapping of academic productions in the Thesis and Dissertation Bank of the Coordination for the Higher Level (CAPES). The methodological resource used was the Discursive Textual Analysis (DTA), organized into three components: unitarization, categorization and metatext. The analyzes allowed to identify how has been discussed the Alternating Regime, in the initial formations in Countryside Education, according to the academic productions analyzed. Keywords: Pedagogy of Alternation, Initial Formation in Countryside Education, Theory and Practice.   La Pedagogía de la Alternancia en las licenciaturas en Educación del Campo: mirada sobre las producciones académicas RESUMEN. Este trabajo tiene como objetivo investigar cómo se está discutiendo la Pedagogía de la Alternancia en las Licenciaturas en Educación del Campo, en las producciones académicas. Para eso, en un primer momento, se realizó un estudio bibliográfico de los históricos de las Licenciaturas en Educación del Campo y de la Pedagogía de la Alternancia, y posteriormente el mapeo de las producciones académicas en el Banco de Tesis y Disertaciones, de la Coordinación de Perfeccionamiento de Personal de Nivel Superior (CAPES). El recurso metodológico utilizado fue el Análisis textual Discursivo (ATD), organizado en tres componentes: unitarización, categorización y metatexto. Los análisis permitieron identificar cómo se está discutiendo el Régimen de Alternancia, en las formaciones iniciales en Educación del Campo, según las producciones académicas analizadas. Palabras clave: Pedagogía de la Alternancia, Formación Inicial en Educación del Campo, Teoría y práctica.

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