The Evolution of a Pair of Sibling Allotetraploid Species of Cobwebby Gilias (Polemoniaceae)

Genetic and Taxonomic Studies in Gilia. XI. Fertility Relationships of the Diploid Cobwebby Gilias

Comparative bioinformatics analysis of a wild diploid Gossypium with two cultivated allotetraploid species

Background: Gossypium thurberi is a wild diploid species that has been used to improve cultivated allotetraploid cotton. G. thurberi belongs to D genome, which is an important wild bio-source for the cotton breeding and genetic research. To a certain degree, chloroplast DNA sequence information are a versatile tool for species identification and phylogenetic implications in plants. Different ch...

Ex uno, multis: taxonomic revision in Navarretia divaricata (Polemoniaceae) and the recognition of four additional cryptic or near-cryptic species

Navarretia divaricata, endemic to western North America and most recently considered a single species with two subspecies, was re-examined in light of field work, DNA sequences, comparative morphology, and a review of herbarium specimens including types. From these studies, we lectotypify the material on which N. divaricata is based, elevate N. divaricata subsp. vividior, which is an allotetrap...

Differential evolutionary dynamics of duplicated paralogous Adh loci in allotetraploid cotton (Gossypium).

Levels and patterns of nucleotide diversity vary widely among lineages. Because allopolyploid species contain duplicated (homoeologous) genes, studies of nucleotide diversity at homoeologous loci may facilitate insight into the evolutionary dynamics of duplicated loci. In this study, we describe patterns of sequence diversity from an alcohol dehydrogenase homoeologous locus pair (AdhC) in allot...

Lineage-specific adaptive evolution of the centromeric protein CENH3 in diploid and allotetraploid Oryza species.

Centromeres in eukaryotic species are defined by the presence of a centromere-specific histone H3 variant, CENH3. CENH3 plays a key role in recruiting other centromeric proteins; thus, it is the central component in kinetochore formation and centromere function. The CENH3 proteins in several plant and animal species were found to be under positive selection, which was hypothesized to respond to...