Phenotypic and molecular basis for genetic variation in jelly palms (Butia sp.): where are we now and where are we headed to?

We compiled studies that addressed morphological and physicochemical traits, as well as population genetic studies involving jelly palms, genus Butia (Arecaceae). First, we conducted a bibliometric study with selected articles, by revising the fundamental contributions to unraveling phenotypic traits that have been used for describing the phenotypic variation within and among populations. Moreover, we sought to comprehend the patterns of genetic diversity and structure that have been presented so far, based on molecular markers. Finally, we conducted a review of the gene sequences registered to NCBI for Butia. Overall, morphological descriptors have been proposed to depict population-level variability, but the most significant results are available from chemical properties and characterization of metabolites, revealing important traits to being explored. Yet, limited information is available to describe population variation and their genetic components. On the molecular level, almost all studies so far provided results with classical molecular markers. The literature of SNP markers for Butia species is virtually non-existent. Given the current endangered state of Butia species, it is urgent that researchers pursue updated genomic technologies to invest in in-depth characterizations of the genetic diversity and structure of jelly palms. The current state of population fragmentation urges effective measures toward their conservation.