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Authors Eudy, D; Bahri, BA; Harrison, ML; Raymer, P; Devos, KM
Author Full Name Eudy, Douglas; Bahri, Bochra A.; Harrison, Melanie L.; Raymer, Paul; Devos, Katrien M.
Title Ploidy Level and Genetic Diversity in the Genus Paspalum, Group Disticha
Source CROP SCIENCE
Language English
Document Type Article
Keywords Plus VAGINATUM SWARTZ; FARMING SYSTEM; VARIABILITY; INHERITANCE; MARKERS; POPULATIONS; PUBESCENCE; SOFTWARE; POACEAE; MAIZE
Abstract The importance of the warm-season grass Paspalum vaginatum Sw. lies in its salt tolerance and its ability to serve as forage, ground cover for erosion control, and turf for sport surfaces in vulnerable areas in the tropics and subtropics. We conducted DNA content measurements using flow cytometry and diversity analyses using 43 simple sequence repeat (SSR) markers in a set of 97 Paspalum group Disticha accessions to resolve the relationship between the two group Disticha species, P. vaginatum Sw. and P. distichum L., and determine their ploidy level, genetic diversity, population structure, and distribution history. Using glume pubescence as a distinguishing characteristic, P. vaginatum accessions were largely diploid and P. distichum accessions largely polyploid, although exceptions were identified in both species. Transferability of genomic P. vaginatum SSRs to P. distichum confirmed the close genetic relationship between the two species. Similarity in SSR allele sizes between the two species may be an indication of gene flow. Population structure analyses grouped the germplasm into three subpopulations. One subpopulation consisted of accessions with mixed leaf texture, mixed glume pubescence phenotypes, and mixed ploidy levels. The other two subpopulations contained only diploid members with a typical P. vaginatum turf phenotype. Our data bring into question the distinguishing characteristics of P. distichum and P. vaginatum and whether they should be considered the same species. We also make some strategic recommendations for new collections and accession maintenance.
Author Address [Eudy, Douglas; Bahri, Bochra A.; Devos, Katrien M.] Univ Georgia, Inst Plant Breeding Genet & Genom, Dept Crop & Soil Sci, Athens, GA 30602 USA; [Eudy, Douglas] Monsanto Co, Huxley, IA 50124 USA; [Bahri, Bochra A.] Natl Agron Inst Tunisia, Dept Plant Protect & Post Harvest Dis, Tunis 1082, Tunisia; [Bahri, Bochra A.; Devos, Katrien M.] Univ Georgia, Dept Plant Biol, Athens, GA 30602 USA; [Harrison, Melanie L.] USDA ARS, Plant Genet Resources Conservat Unit, Griffin, GA 30223 USA; [Raymer, Paul] Univ Georgia, Inst Plant Breeding Genet & Genom, Dept Crop & Soil Sci, Griffin, GA 30223 USA
Reprint Address Devos, KM (corresponding author), Univ Georgia, Inst Plant Breeding Genet & Genom, Dept Crop & Soil Sci, Athens, GA 30602 USA.; Devos, KM (corresponding author), Univ Georgia, Dept Plant Biol, Athens, GA 30602 USA.
E-mail Address kdevos@uga.edu
ORCID Number bahri, bochra/0000-0001-5905-5880
Funding Agency and Grant Number National Science FoundationNational Science Foundation (NSF); University of Georgia
Funding Text We thank Brian Schwartz for conducting the flow cytometric analysis of 'replicate 3'. The research was supported by a National Science Foundation Graduate Research Fellowships Program award to Douglas Eudy and by the University of Georgia.
Times Cited 2
Total Times Cited Count (WoS, BCI, and CSCD) 2
Publisher CROP SCIENCE SOC AMER
Publisher City MADISON
Publisher Address 677 S SEGOE ROAD, MADISON, WI 53711 USA
ISSN 0011-183X
29-Character Source Abbreviation CROP SCI
ISO Source Abbreviation Crop Sci.
Publication Date NOV-DEC
Year Published 2017
Volume 57
Issue 6
Beginning Page 3319
Ending Page 3332
Digital Object Identifier (DOI) 10.2135/cropsci2017.04.0241
Page Count 14
Web of Science Category Agronomy
Subject Category Agriculture
Document Delivery Number FJ6OJ
Unique Article Identifier WOS:000412877000038
Plants associated with this reference

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