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The Plant Genome Abstract - Original Research

Linkage Maps of a Mediterranean × Continental Tall Fescue Population and their Comparative Analysis with Other Poaceae Species

 

This article in TPG

  1. Vol. 8 No. 1
    unlockOPEN ACCESS
     
    Received: July 24, 2014
    Accepted: Jan 08, 2015
    Published: March 13, 2015


    * Corresponding author(s): rdierkin@purdue.edu
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doi:10.3835/plantgenome2014.07.0032
  1. Ryan Dierking *a,
  2. Perumal Azhaguvelbd,
  3. Robert Kallenbachc,
  4. Malay Sahad,
  5. Joseph Boutond,
  6. Konstantin Chekhovskiyd,
  7. David Kopeckýe and
  8. Andrew Hopkinsf
  1. a Dep. of Agronomy, Purdue Univ., 915 West State St., West Lafayette, IN 47907
    b Syngenta, 2369- 330th Street, Slater, IA 50244
    d Forage Improvement Division, The Samuel Roberts Noble Foundation, Inc., Ardmore, OK
    c Division of Plant Sciences, Univ. of Missouri, 208 Waters Hall, Columbia, MO 65211
    e Centre of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany, Slechtitelu 31, Olomouc, 78371, Czech Republic
    f Dow AgroSciences, Inc., 1117 Recharge Rd., York, NE 68467

Abstract

Temperate grasses belonging to the Festuca–Lolium complex are important throughout the world in pasture and grassland agriculture. Tall fescue (Festuca arundinacea Schreb.) is the predominant species in the United States, covering approximately 15 million ha. Tall fescue has distinctive morphotypes, two of which are Continental (summer active) and Mediterranean (summer semidormant). This is the first report of a linkage map created for Mediterranean tall fescue, while updating the Continental map with additional simple sequence repeat and sequence-tagged site markers. Additionally, this is the first time that diversity arrays technology (DArT) markers were used in the construction of a tall fescue map. The male parent (Continental), R43-64, map consisted of 594 markers arranged in 22 linkage groups (LGs) and covered a total of 1577 cM. The female parent (Mediterranean), 103-2, map was shorter (1258 cM) and consisted of only 208 markers arranged in 29 LGs. Marker densities for R43-64 and 103-2 were 2.65 and 6.08 cM per marker, respectively. When compared with the other Poaceae species, meadow fescue (F. pratensis Huds.), annual ryegrass (L. multiflorum Lam.), perennial ryegrass (L. perenne L.), Brachypodium distachyon (L.) Beauv., and barley (Hordeum vulgare L.), a total of 171 and 98 orthologous or homologous sequences, identified by DArT analysis, were identified in R43-64 and 103-2, respectively. By using genomic in situ hybridization, we aimed to identify potential progenitors of both morphotypes. However, no clear conclusion on genomic constitution was reached. These maps will aid in the search for quantitative trait loci of various traits as well as help define and distinguish genetic differences between the two morphotypes.

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