Analysis of the selected plants revealed that plants selected from accessions with superior seed germination rates also showed significant differences for all other traits. (Poaceae, saltmeadow cordgrass), Spartina alterniflora Loisel. Protocols for fingerprinting Spartina Zonation of Spartina patens and Spartina alterniflora in a New England salt marsh. (smooth cordgrass) (Denno 1977, 1978), with Spartina alterniflora “…an inferior host plant for development” (Denno 1977: 366). Spartina brasiliensis Raddi Spartina glabra Muhl. Mode of pollination, pollen germination, and seed set in smooth cordgrass (Spartina alterniflora, Poaceae). Fusarium palustre was associated with the dieback of Spartina alterniflora in its native North American saltmarshes. Smooth cordgrass (Spartina alterniflora) is used extensively for shoreline protection and tidal marsh restoration on the Atlantic and Gulf coasts because of its aggressive colonizing ability and tolerance to a wide range of salinity. Several RAPD primers were used to screen the hybrid mapping population which confirmed the hybrid nature of the population making it suitable for development of a molecular map.ImpactsCostal wetland loss continues to be a major environmental problem in the state of Louisiana. Ecology. Compared to the original 126 native accessions, these results demonstrated a significant improvement. S. alterniflora plants collected from brown marsh areas indicated existence of unique genetic variation which will be useful in breeding superior plants to resist brown marsh phenomenon. A population of 100 hybrids involving two smooth cord grass lines has been generated for construction of a genetic map to locate the QTL for seed characteristics. Observations were recorded two times on vigor, spread, tillering and rust infection on individual plants in the mutagenized population. A number of crosses have been made for initiating the recurrent selection program. 65(6): 1794-1807. Trachynotia alterniflora (Loisel.) Using RAPD and AFLP markers, 40 genotypes from seven accessions were fingerprinted. Ryan, A.B., Subudhi, P.K., Venuto, B.C., Harrison, S.A., and Shadow, R.A. 2003. Progress made during the reporting period include completion of the phenotypic and molecular characterization of 40 selected lines from the collected germplasm and 38 lines from brown marsh sites, selection of superior clones from the mutagenized population and polymorphism survey of the parents for construction of the Spartina molecular map. Late flowering accessions were associated with increased spread and tiller density but not with the other traits. Atlantic cordgrass. Soc. 2003). 96 0 obj <> endobj DC. Plant Sci. marshhay cordgrass Spartina patens (Ait.)Muhl. Fourteen RAPD primers and 26 AFLP primer combinations generated a total of 201 and 2430 DNA fragments respectively. Grande Terre, Louisiana, showed that seed set varied greatly both within and among accessions. A number of crosses were made each year in the recurrent selection program. Spartina alterniflora has also been found to hybridize with S. foliosa, producing offspring that may be an even greater threat than S. alterniflora by itself. DNA fingerprinting protocols developed through this project will help to test the authenticity of plant materials used in the restoration projects. BASIONYM: Spartina glabra Muhlenberg ex … The hybrids will be evaluated in the marsh condition, and the best performing ones will be identified for next round of crossing and selection. Rescuing the coast with biotechnology. Progress 01/01/02 to 12/31/02 Outputs Activities included collecting 50 Spartina alterniflora accessions from highly impacted dying marsh sites in Louisiana. Burdick, David M. 1989. Family: Poaceae Introduction Over the last 25 p:12. 2011). 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