Abstract Detail

Recent Topics Posters

Cruse-Sanders , Jennifer Michelle [1], friar, Elizabeth [2], Parker, Kathleen [3], Huang, Daisie [4], Mashayekhi, Saeideh [5], Prince, Linda [6], otero-arnaiz, Adriana [7], Casas, Alejandro [8].

Managing diversity:domestication and gene flow in Stenocereus stellatus Riccob. in Mexico.

Microsatellite markers were developed for analysis of population genetic variation in the columnar cactus Stenocereus stellatus, managed under traditional agriculture practices in Central Mexico. Microsatellite diversity was analyzed within and among populations, within local population centers, between geographic regions (Tehuacán Valley vs. La Mixteca Baja), and among population management types (wild, managed, cultivated) to provide detailed insight into historical gene flow rates and population dynamics. Our results corroborate a greater diversity in populations managed by farmers compared to wild ones, but with some regional variation between populations in the Tehuacán Valley and La Mixteca Baja. Although this species often propagates vegetatively, higher levels of diversity within managed populations did not result from farmers planting multiple clones of particular individuals. Two managed populations adjacent to towns were identified as major sources of gene movement in each sampled region. However genetic distance analysis and estimates of migration between populations did not identify nearby populations to be primary recipients of this gene flow. Rather, distant populations under varying management intensities shared a higher proportion of genotypes suggesting that farmers (or natural processes) promote genetic diversity in managed populations through long distance gene exchange. Managementof this species within traditional agriculture systems has not only led to domestication,but has increased population level genetic diversity and shared genotypes among varied populations across the landscape.

Broader Impacts:

Related Links:
Cactus domestication
Atlanta Botanical Garden
Science Cafe
research page for Alajandro Casas

1 - Atlanta Botancal Garden, Department of Conservation Research, 1345 Piedmont Ave., NE, Atlanta, GA, 30309, USA
2 - National Science Foundation, Department of Environmental Biology, 4201 Wilson Boulevard, Arlington, VA, 22230, usA
3 - University of Georgia, Geography, Athens, GA, 30602, USA
4 - 160 May Ave., Monrovia, CA, 91016, USA
5 - Rancho Santa Ana Botanic Garden, 1500 N. College Ave., Claremont, CA, 91711-3157, USA
6 - Rancho Santa Ana Botanic Garden, 1500 N College Avenue, Claremont, CA, 91711-3157, USA
7 - Instituto Nacional de Ecología, Programa de Bioseguridad, Instituto Nacional de Ecología, SEMARNAT, Periférico Sur 5000, Col. Insurgentes Cuicuilco , Mexico City DF, Mexico City DF, 04530, Mexico
8 - INSTITUTO DE ECOLOGIA UNAM, APARTADO POSTAL 27-3 (XANGARI), MORELIA, MICHOACAN, 58190, México

Keywords:
domestication
conservation
gene flow
Cactus
ethnobotany
botanic garden.

Presentation Type: Recent Topics Poster
Session: P
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM
Number: PRT024
Abstract ID:1090