Genetic diversity in populations of Maytenus dasyclada (Celastraceae) in forest reserves and unprotected Araucaria forest remnants

Abstract

Understanding the genetic structure and diversity of plants is fundamental to their conservation and permits their sustainable use by local communities. Th e genus Maytenus (Celastraceae) is composed of plants possessing pharmacological and antioxidant properties. However, the genetic and economic properties of the species M. dasyclada, a typical species of Araucaria forests in Brazil and Uruguay, have been little studied. In this work, the genetic structure and diversity of natural populations of M. dasyclada located in unprotected and preserved forest remnants were investigated using RAPD and isozymes markers. Th e results demonstrated that in areas of preservation, populations of M. dasyclada possess a relatively high degree of polymorphism and high values for Na, Ne, Shannon index, He and Ho, indicating high genetic variability. Moreover, these protected populations are very close to each other and potentially experience signifi cant gene fl ow. Th e results presented here highlight the relevance of preservation areas for the conservation of M. dasyclada, and that populations inhabiting these areas could serve as a genetic source for the recovery of populations in regions where genetic diversity has been lost.

Gene Diversity in Grevillea Populations Introduced in Brazil and Its Implication on Management of Genetic Resources

“…Nowadays articles using isoenzymes as main technique (Litkowiec et al, 2013;Mathiasen and Premoli, 2013;Harter et al;Medoukali et al, 2015;Chlumský et al, 2016;Kutlunina et al, 2016;Luo et al, 2016;El-Esawi et al, 2017;Konzen and Martins, 2017) as well in association with molecular markers (Streiff et al, 1998;De Woody et al, 2009;Ekart et al, 2016;Reichmann et al, 2017;Quipildor et al, 2018;) are still published worldwide on population genetic studies. Although molecular markers are more informative and currently used, in some cases isozymes is still helpful to screen population and individuals…”

Native forest metacommunity structures in Uruguay shaped by novel land‐use types in their surroundings

“…This species was classified as nontolerant to flooding and with high mortality in areas with high cover of herbs and litter (Bianchini et al, 2013). Population of Maytenus dasyclados, also recorded once in the regeneration layer, other studies showed that the species is decreasing in Southern Brazil as a result of anthropogenic fragmentation (Reichmann et al, 2017).…”