Genetic diversity and gene flow among seashore paspalum population revealed by AFLP and SSRs. (5065)
Authors:
Z. Chen* - Univ. of Georgia
M. Newman - PGRCU, USDA-ARS W. Kim - Univ. of Georgia
M. Wang - PGRCU, USDA-ARS P. Raymer - Univ. of Georgia
Abstract:
Seashore paspalum, Paspalum vaginatum, can grow under such extreme environmental conditions such as high salinity, water logging, water deficiency or drought, a wide range of soil water pH, and low light intensity. It has now been widely employed as a turfgrass for golf courses, sport fields and general landscaping along the salt-affected coastal region. A collection of seashore paspalum ecotypes was assembled in the 1990s at the Plant Germplasm Resources Conservation Unit (PGRCU), of the USDA-ARS, in Griffin, USA. The genetic diversity of the germplasm collection was accessed using amplified fragment-length polymorphism (AFLP). A total of 381 AFLPs were generated with three primer combinations in seashore paspalum and other paspalum species. All seashore paspalum
accessions were clustered into one of three major groups, which was consistent with classification based on leaf types. The highest level of genetic similarity occurred among the accessions from Hawaii.
Analysis of genetic diversity within and between regions supported the introduction path of Africa to South America and North America, then from North America to Hawaii. A reduction in the level of genetic diversity occurred successively during the introduction of seashore paspalum from Africa to South and North America and then to Hawaii.
Speaker Information: Zhenbang Chen, Univ. of Georgia, Crop and Soil SciencesUniversity of GeorgiaGriffin Campus1109 Experiment Street, Griffin, GA 30223; Phone: 770-228-7331; E-mail:
Session Information: Thursday, November 4, 2004, 8:25 AM-11:00 AM Presentation Start: 9:15 AM
Keywords: Paspalum vaginatum; genomic analysis; turfgrass; germplasm collection
