Phenotypic variation seems not to be associated with the genetic profile in Zygopetalum (Orchidaceae): a case study of a high-elevation rocky complex.

Background: Hybridization associated with polyploidy studies is rare in the tropics. The genus Zygopetalum (Orchidaceae) was investigated here as a case study of Neotropical plants. In the rocky highlands of the Ibitipoca State Park (ISP), southeast Brazil, individuals with intermediate colors and forms between the species Z.

Water stress modulates terpene biosynthesis and morphophysiology at different ploidal levels in Lippia alba (Mill.) N. E. Brown (Verbenaceae).

Monoterpenes are the main component in essential oils of Lippia alba. In this species, the chemical composition of essential oils varies with genome size: citral (geraniol and neral) is dominant in diploids and tetraploids, and linalool in triploids. Because environmental stress impacts various metabolic pathways, we hypothesized that stress responses in L.

Aneuploids and its increment on diversity of Lippia alba polyploid complex: genetic aspects and origin.

Background: Aneuploidy is associated with add or lack of individual chromosomes. The knowledge regarding aneuploidy is still rare in wild and tropical populations. Lippia alba is a tropical polyploid complex naturally formed, with 2x, 3x, 4x, 6x, and aneuploid individuals.

Deciphering ploidal levels of Lippia alba by using proteomics.

Lippia alba (Mill.) N.E.

Validation of reference genes for quantitative gene expression in the Lippia alba polyploid complex (Verbenaceae).

Lippia alba (Verbenaceae) is one of the most studied species of the genus Lippia, mainly due to its medicinal properties. The species was described as a polyploid complex with five cytotypes. The comparison of gene expression in species with several ploidal levels needs to be conducted carefully due to possible changes in gene regulation.

Development of microsatellite markers for Lippia alba and related Lippia species.

Microsatellite primers were developed in Lippia alba complex to better understanding the origins and evolution of the species. We sought to increase the numbers of available simple sequence repeat (SSR) markers. We performed low-coverage (~ twofold) genomic DNA sequencing of a diploid accession and generated a de novo assembly comprising 175,572 contigs.

Induction of Synthetic Polyploids and Assessment of Genomic Stability in .

Polyploidy is widely recognized as a major evolutionary force in plants and has been reported in the genus (Verbenaceae). , the most studied species, has been documented as a polyploid complex involving at least four ploidal levels. presents remarkable chemical and genetic variation and represents a model for understanding genome organization.

Genetic relationships and polyploid origins in the Lippia alba complex.

Premise: Plant genomes vary in size and complexity due in part to polyploidization. Latitudinal analyses of polyploidy are biased toward floras of temperate regions, with much less research done in the tropics. Lippia alba has been described as a tropical polyploid complex with diploid, triploid, tetraploid, and hexaploid accessions.