scholarly journals Hybridization, polyploidy and clonality influence geographic patterns of diversity and salt tolerance in the model halophyte seashore paspalum ( Paspalum vaginatum )

2020 ◽  
Vol 30 (1) ◽  
pp. 148-161
Author(s):  
David M. Goad ◽  
Ivan Baxter ◽  
Elizabeth A. Kellogg ◽  
Kenneth M. Olsen
2008 ◽  
Vol 37 (2) ◽  
pp. 586-591 ◽  
Author(s):  
G. S. Nuessly ◽  
R. T. Nagata ◽  
J. D. Burd ◽  
M. G. Hentz ◽  
A. S. Carroll ◽  
...  

Author(s):  
Luisa Martelloni ◽  
Marco Fontanelli ◽  
Lisa Caturegli ◽  
Monica Gaetani ◽  
Nicola Grossi ◽  
...  

Weed control is crucial to ensure that turfgrass is established effectively. Although herbicides are commonly used to control weeds in turfgrasses, environmental and public health concerns have led to limiting or banning the use of synthetic herbicides in urban areas. The species seashore paspalum (Paspalum vaginatumSw.) is susceptible to such herbicides. Flame weeding could be an alternative to the use of synthetic herbicides for selective weed control in seashore paspalum. In this study, five different liquefied petroleum gas (LPG) doses of flaming (0, 61, 91, 157 and 237 kg ha-1) were tested in order to find the optimal dose, in terms of weed control and costs. The aim was to maintain a seashore paspalum (cultivar ‘Salam’) turf free of weeds during spring green-up, and at the same time avoid damaging the turfgrass. Using a self-propelled machine designed and built at the University of Pisa, flaming was applied three times when weeds started growing and the turfgrass started green-up. Our results highlight that an LPG dose of 157 kg ha-1was the most economic dose that led to a significant reduction in initial weed cover and density, enabling the turfgrass to recover three weeks after the third application.


2006 ◽  
Vol 53 (4) ◽  
pp. 779-791 ◽  
Author(s):  
M. L. Wang ◽  
Z. B. Chen ◽  
N. A. Barkley ◽  
M. L. Newman ◽  
W. Kim ◽  
...  

2008 ◽  
Vol 63 (1-3) ◽  
pp. 19-27 ◽  
Author(s):  
Geungjoo Lee ◽  
Robert N. Carrow ◽  
Ronny R. Duncan ◽  
Mark A. Eiteman ◽  
Mark W. Rieger

Genome ◽  
1994 ◽  
Vol 37 (6) ◽  
pp. 1011-1017 ◽  
Author(s):  
Zhao-Wei Liu ◽  
Robert L. Jarret ◽  
Ronny R. Duncan ◽  
Stephen Kresovich

Random amplified polymorphic DNA (RAPD) markers were used to assess genetic relationships and variation among ecotypes of the turfgrass seashore paspalum (Paspalum vaginatum Swartz). Vegetative tissues or seeds of 46 seashore paspalum ecotypes were obtained from various locations in the United States, Argentina, and South Africa. Leaf DNA extracts were screened for RAPD markers using 34 10-mer random primers. A total of 195 reproducible RAPD fragments were observed, with an average of six fragments per primer. One hundred and sixty-nine fragments (87% of the total observed) were polymorphic, among which 27 fragments (16%) were present in three or less ecotypes, indicating the occurrence of a high level of genetic variation among the examined accessions of this species. Cluster analysis (UPGMA) and principal coordinates analysis were performed on the RAPD data set. The results illustrate genetic relationships among the 46 ecotypes, and between ecotypes and their geographical origins. Ecotypes from southern Africa could be differentiated from the U.S. and most of the Argentinean ecotypes. With a few exceptions, ecotypes collected from Argentina, Hawaii, Florida, and Texas were separated into distinct clusters.Key words: RAPDs, polymerase chain reaction, genetic diversity, phenetic analysis.


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