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United States Department of Agriculture

Agricultural Research Service

Title: Using Geographic Information Systems to Locate Genetic Diversity of Cultivated Peanut

Authors
item Williams, David - IPGRI
item Williams, Karen
item Guarino, L - IPGRI
item Hyman, G - CIAT

Submitted to: American Society of Agronomy
Publication Type: Abstract Only
Publication Acceptance Date: October 18, 1998
Publication Date: N/A

Technical Abstract: Geographic Information Systems (GIS) technology is used to study the relationship of the human and physical environment with the distribution of cultivated peanut diversity in Ecuador and Guatemala. A GIS database was developed for Ecuador using morphological characterization of peanut landraces, socio-economic and environmental data, and satellite imagery. Spatial analysis of diversity using the Shannon-Weaver index was based on a 100 kilometer grid overlay. A statistical analysis was conducted to identify those variables that most closely correlate with the distribution of peanut diversity. This empirical model was then used to predict the distribution of peanut diversity in Guatemala and a digital map was produced indicating most likely areas of high diversity. Germplasm collecting in Guatemala is still underway using the predictive maps. This approach could be a powerful tool for targeting areas of high diversity and risk of genetic erosion in cultivated species.

Last Modified: 11/25/2014
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