Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Biology
Substructuring In Four Populations Of African Descent, Margarita Teresa Almeida
Substructuring In Four Populations Of African Descent, Margarita Teresa Almeida
FIU Electronic Theses and Dissertations
When a suspect's DNA profile is admitted into court as a match to evidence the probability of the perpetrator being another individual must be calculated from database allele frequencies. The two methods used for this calculation are phenotypic frequency and likelihood ratio. Neither of these calculations takes into account substructuring within populations. In these substructured populations the frequency of homozygotes increases and that of heterozygotes usually decreases. The departure from Hardy- Weinberg expectation in a sample population can be estimated using Sewall Wright's Fst statistic. Fst values were calculated in four populations of African descent by comparing allele …
Biology And Use Of Nibbi Heteropsis Flexuosa (Araceae) The Source Of An Aerial Root Fiber Product In Guyana, Bruce Hoffman
Biology And Use Of Nibbi Heteropsis Flexuosa (Araceae) The Source Of An Aerial Root Fiber Product In Guyana, Bruce Hoffman
FIU Electronic Theses and Dissertations
The aerial roots of Heteropsis flexuosa (Kunth) Bunting, a hemi-epiphyte, are harvested by indigenous communities in Guyana for a developing wicker furniture market. Nibbi roots have potential as a sustainably harvested product, but there is little data to guide management. I examined nibbi biology, harvest response, product yield and use at several forest sites. H. flexuosa is a relatively abundant plant and 35% of trees (≥ 10 cm dbh) in plots were hosts. Stems exhibited mean growth rates of 1-3 cm per month. Aerial roots grew a mean 156 cm per month and some reached maturity within 6 months. With …