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GENE FLOW IN NATURAL POPULATIONS OF CARICA PAPAYA IN THE FRAGMENTED LANDSCAPES OF COSTA RICA AND NICARAGUA

Arlinghaus, Kel R
http://rave.ohiolink.edu/etdc/view?acc_num=miami1470400678

Abstract Details

2016, Master of Science in Botany, Miami University, Biology.
Wild crop relatives serve as a natural genetic reservoir for crop improvement as they may harbor alleles that aid in disease resistance and environmental adaptability. One major threat to the reservoir of genetic diversity in wild populations is habitat fragmentation which may isolate populations and reduce genetic admixture across agricultural lands. Carica papaya is a dioecious early successional species native to Central America and is potentially threatened by habitat fragmentation. It can be found growing along roadsides, abandoned fields, and secondary lowland forests. Morphological and genetic diversity was measured for wild papaya in regions of Costa Rica and Nicaragua. Connectivity in the landscape was measured using Circuitscape in ArcMap10.3. Wild papaya is morphologically consistent in certain traits, in particular, its small, yellow, seedy fruits, and vegetative characters tend to vary more than reproductive characters. The genetic health of wild papaya was moderate, but diversity is partitioned among regions as a consequence of inbreeding. We have evidence that wild papaya is susceptible to the detrimental effects of habitat fragmentation which inhibits gene flow and promotes inbreeding. Conservation efforts should focus on areas of high connectivity and selecting natural individuals for a living germplasm line.
Richard Moore, Dr. (Advisor)
James Hickey, Dr. (Committee Member)
Chun Liang, Dr. (Committee Member)
71 p.
Genetics
Populations genetics; Landscape genetics; CircuitScape; Crop Wild Relatives; Carica papaya

Recommended Citations

Citations

  • Arlinghaus, K. R. (2016). GENE FLOW IN NATURAL POPULATIONS OF CARICA PAPAYA IN THE FRAGMENTED LANDSCAPES OF COSTA RICA AND NICARAGUA [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1470400678

    APA Style (7th edition)

  • Arlinghaus, Kel. GENE FLOW IN NATURAL POPULATIONS OF CARICA PAPAYA IN THE FRAGMENTED LANDSCAPES OF COSTA RICA AND NICARAGUA. 2016. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1470400678.

    MLA Style (8th edition)

  • Arlinghaus, Kel. "GENE FLOW IN NATURAL POPULATIONS OF CARICA PAPAYA IN THE FRAGMENTED LANDSCAPES OF COSTA RICA AND NICARAGUA." Master's thesis, Miami University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1470400678

    Chicago Manual of Style (17th edition)

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© 2016, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.