English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Variation of ribosomal DNA (rDNA) was analyzed within and among individuals, populations, and subspecies of Phlox divaricata. Phlox divaricata is a widespread woodland perennial of the midwestern United States. It consists of a large eastern subspecies, ssp. divaricata, and a more restricted western subspecies, ssp. Zaphami. As in other plant species, individual plants may contain as many as five types of rDNA length variants. rDNA repeat-type frequencies were determined within eight populations, four of each subspecies. There is clear differentiation among populations of a subspecies, and there also are differences between the two subspecies in both the number and types of rDNA repeats. Subspecies divaricata has more variation than does ssp. Zaphami, both in the number of rDNA repeat types (nine vs. eight, respectively) and in the average number of repeat types within an individual (2.47 vs. 1.52, respectively). rDNA diversity was analyzed using the Shannon diversity index. Of the total diversity in the species, 6 1% is found among individuals of a population, 2 1% is found within subspecies among populations, and 18% is found between the two subspecies. On the basis of morphological criteria, ssp. Zamphami is considered derived from ssp. divaricata. The rDNA data are not completely consistent with this interpretation. The diversity of rDNA found within ssp. Zaphami is less than that in ssp. divaricata, as would be expected for a derived taxon. On the other hand, laphami has three repeat types not present in divaricata.

Ribosomal DNA Variation in the Native Plant Phlox divaricata