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Abstract Detail



Crops and Wild Relatives

Moore, Rich [1], Arlinghaus, Kel [2], Mardonovich, mardons@miamioh.edu [3], Chae, Taylor [4], Vossler, Harley [5], Rocha, Oscar [6].

Crop wild relative gene flow across a fragmented Central American landscape.

Crop wild relatives serve as an important genetic reservoir for their domestic counterparts. Unfortunately, crop wild relatives can be threatened by the fragmentation of human dominated landscapes and crop-to-wild gene flow. The tropical fruit crop, papaya (Carica papaya L.), grows naturally in the fragmented Mesoamerican landscape, sometimes alongside cultivated fields. We assessed the conservation risk to wild papaya populations using morphological and population genetic analyses of naturally occurring papaya in Southern Central America, from Nicaragua to Panama, which represents the southernmost extent of papaya’s natural geographic range. Across wild papaya populations, genetic diversity is moderately high, though most populations exhibit moderate levels of bi-parental inbreeding. Regional populations are genetically structured, with populations in Nicaragua, Costa Rica, and Panama showing evidence of regional differentiation. Connectivity analysis in populations of Costa Rica and Nicaragua show limited landscape connectivity due to landscape fragmentation. However, we did identify regions of high landscape connectivity corridors associated with lower population differentiation. Thus, while there is evidence of mild genetic erosion in wild papaya in Panamá, genetic diversity is still moderately high and gene flow is healthiest across natural landscape corridors.


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1 - Miami University, Biology, 316 Pearson, Oxford, OH, 45056, United States
2 - Miami University, 700 E High St, Oxford, OH, 45056.0, United States
3 - Miami University, 700 E. High St, 316 PSN, Oxford, OH, 45056.0, United States
4 - Miami University, Botany Dept., 700 E. High Street, Pearson Hall, Oxford, OH, 45056, United States
5 - Miami University, Biology, 316 Pearson Hall, Oxford, OH, 45056, United States
6 - Kent State Univerity, Department Of Biological Sciences, 256 Cunningham Hall, Kent, OH, 44242, United States

Keywords:
population genetics
Crop wild relatives
gene flow
Tropical plants
Tropical fruit crop.

Presentation Type: Poster
Session: P, Crops and Wild Relatives
Location: Grand Ballroom - Exhibit Hall/Mayo Civic Center
Date: Monday, July 23rd, 2018
Time: 5:30 PM This poster will be presented at 5:30 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PCW009
Abstract ID:825
Candidate for Awards:None


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