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Abstract Detail



Population Genetics

Arlinghaus, Kellen R. [1], Mardonovich, Sandra [2], Acosta, Johnsua [3], Moore, Richard C. [3].

Morphological characteristics of wild Carica papaya.

Landscape genetics is a field that combines both population genetics and landscape ecology to study the effects that the landscape has on the genetic dynamics of a population. One problem that arises in landscape genetics is habitat fragmentation which can harm genetic diversity by reducing gene flow between populations. Early successional species are more likely to grow in areas of heavy habitat fragmentation and experience reduced gene flow. We propose Carica papaya as a model organism to address the problem of habitat fragmentation in Central America. Carica papaya is a dioecious early successional species native to Central America and can be found growing along roadsides, abandoned fields, and in secondary lowland forests. Wild Papaya was collected from 8 regional populations in Costa Rica and 5 regional populations in Nicaragua. Sex ratios and morphological characteristics were compared among regions including leaf, fruit, and floral characteristics. Male biased populations were detected in regions of NW Costa Rica. Wild papaya is characterized by low diversity in morphological traits with small seedy fruits and small yellow-white flowers. Currently, we are genotyping each individual with 20 microsatellite loci in order to determine the levels of gene flow within and among populations. Ultimately, we hope to combine these data with landscape information to address the effects of forest fragmentation on gene flow between populations and levels of inbreeding within populations.


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1 - Miami University, Biology, 124 East Sycamore Street, Oxford, OH, 45056, USA
2 - Miami University, Botany, 649 Erin Dr. Apt. #5, Oxford, OH, 45056, USA
3 - Miami University, Biology, 700 East High Street, Oxford, OH, 45056, USA

Keywords:
population genetics
morphology
crop wild relatives.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PPG007
Abstract ID:1070
Candidate for Awards:None


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