Caracterização e Divergência Genética de Populações de Casearia grandiflora no Cerrado Piauiense

Abstract

RESUMOCasearia grandiflora (Salicaceae) é uma espécie típica do cerrado piauiense, o conhecimento da diversidade genética dessa espécie é de grande importância para estabelecimento de práticas e estratégias de conservação biológica. O presente estudo teve como objetivo caracterizar a diversidade de C. grandiflora em duas áreas de cerrado do Piauí. Foram analisados 15 descritores de natureza quantitativa, através da medição do caule, folha, fruto e semente, seguida de posterior análise multivariada (componentes principais e agrupamento). Tanto a análise de componentes principais quanto os métodos de agrupamento apresentaram semelhanças na associação das plantas, o que contribuiu para o conhecimento dos padrões de variação fenotípica e divergência da espécie, sendo que a maior variação da diversidade genética foi encontrada dentro das populações. Os resultados fornecem informações importantes, visto que na literatura descrições sobre caracterização morfológica e diversidade genética dessa espécie ainda são limitadas.Palavras-chave: características fenotípicas, componentes principais, Salicaceae. Characterization and Genetic Divergence of Casearia grandifloraPopulations in the Cerrado of Piaui State, Brazil ABSTRACTCasearia grandiflora (Salicaceae) is a species typical of the savanna of Piaui state. Knowledge about its genetic diversity is of great importance to establish practices and strategies of biological conservation. This study aimed to characterize C.grandiflora diversity in two areas of savanna. Fifteen quantitative descriptors were analyzed trough measurement of steam, leaf, fruit and seed, followed by multivariate analysis (principal component and grouping). Both principal component analysis and grouping methods showed similarities in plant association, which contribute to the knowledge on patterns of phenotypic variation and species divergence, with the greatest genetic diversity variation found within the populations. The results provide important information because descriptions of morphologic characterization and genetic diversity of this species are still limited in the specific literature.

Biometry and genetic diversity of paradise nut genotypes (Lecythidaceae)

“…The same group formation was confirmed by both the Tocher's method, based on the generalized distance of Mahalanobis (Table 4), and the canonical variables (Figure 1), for the biometric characteristics of fruit and seed of paradise nut genotypes. In a diversity study of Casearia grandiflora (Salicaceae), both the main component analysis and the clustering methods showed similarities in the clustering of the plants, which contributed to the knowledge of the phenotypic variation and divergence patterns of the species (Costa et al, 2016). In the present study, there was a large group separation due to their heterogeneity, which is of interest for breeding programs using distant genotypes.…”

GENETIC DIVERGENCE IN POPULATIONS OF Caryocar brasiliense Camb. FROM THE PHYSICAL CHARACTERISTICS OF THE FRUITS

“…The preponderance of genetic variation within populations in relation to variation between them is observed in several tree species for different phenotypic characteristics (Fernandes, 2008;Silva et al, 2012;Costa et al, 2016;Soares et al, 2017). These observations are also confirmed by studies carried out with the pequi tree in regions of northern Minas Gerais, where it was found that divergences among populations or between groups of populations for this species are relatively low (Melo Júnior et al, 2004;Fernandes, 2008).…”

MORPHOMETRIC DESCRIPTORS AND PHYSIOLOGICAL SEED QUALITY FOR SELECTING Aspidosperma pyrifolium Mart. MATRIX TREES

“…Intrapopulational genetic divergence has also been observed through morphometric descriptors in Casearia grandiflora Camb. populations, with most of the variations being observed within the populations (COSTA et al, 2016).…”