Genetic Diversity and Structure of Syagrus romanzoffiana (Cham.) Glassman (Arecaceae) in Southern Brazil

Abstract

The species Syagrus romanzoffiana is a monocot belonging to the family Arecaceae; it is a palm endemic to South America and is widely distributed throughout the southeast and south of Brazil, including the State of Rio Grande do Sul. To estimate the genetic diversity and structure of the species in the watersheds of Rio Grande do Sul, five simple sequence repeat markers were used to analyze 90 individuals, representing three populations. The genetic structure of S. romanzoffiana groups was evaluated through the analysis of molecular variance and a multivariate analysis based on Nei's genetic distance. The evaluated populations showed significant intrapopulation molecular variation (F ST ¼ 0.11). The observed heterozygosity (H O ¼ 0.17) was lower than the expected heterozygosity (H E ¼ 0.75). These data indicate that although the number of individuals is high, the diversity is low for some indices. Our findings suggest that further studies are needed, particularly on the genetics of natural populations of S. romanzoffiana in Rio Grande do Sul State, to fully characterize their genetic diversity and structure and determine strategies and priority areas for species conservation.

Complete chloroplast genomes of six Neotropical palm tree species: genome structure comparison, identification of repeats sequences and evolutionary dynamic patterns

“…In the Brazilian Northwest, 11 natural populations of C. prunifera were analyzed using Inter Simple Sequence Repeats (ISSR) markers, in which genetic bottlenecks were detected due to wax extracting, land-use change for wind power expansion and agriculture decreasing natural habitat 17,21 . For S. romanzo ana, a recent study using SSR (single sequence repeats) markers detected low diversity in speci c genetic parameters, emphasizing the need of increasing genetic research within this species 22 . No studies using genetic markers or gene sequences have been published for the species C. alba.…”

Initial growth of Syagrus romanzoffiana seedlings in biosolid-based substrate1

“…It is a native species from Brazil with great potential for use, as it produces oil, fiber and hearts of palm, besides being considered ornamental, reaching heights of approximately 20 m. It also has ecological importance for its sweet-tasting fruits, being consumed by parrots and other wild animals. It is widely distributed mainly in the southeastern and southern regions of Brazil (Bernacci et al 2008, Laindorf et al 2018, Weirich Neto et al 2020).…”

Diversidade genética de Butia lallemantii Deble & Marchiori (Arecaceae) com base em dados morfométricos de três populações naturais com ocorrência no bioma Pampa

“…Para Büttow et al (2010), são insuficientes as informações científicas a respeito de espécies deste gênero, que possam colaborar para a sua utilização em programas de conservação e melhoramento. Além disso, os estudos sobre a diversidade genética em Arecaceae são necessários, para compreender suas características morfofisiológicas adaptadas às condições ecológicas (Rosa et al, 2021) e o esclarecimento sobre a diversidade genética, essenciais para entender suas características ecológicas, como as delimitações de agrupamentos e a composição das populações (Laindorf, et al, 2018).…”