title: Analysis of genetic diversity in flowering dogwood natural stands using microsatellites: the effects of dogwood anthracnose.
abstract: Flowering dogwood (Cornus florida L.) populations recently have experienced severe declines caused by dogwood anthracnose. Mortality has ranged from 48 to 98%, raising the concern that genetic diversity has been reduced significantly. Microsatellite data were used to evaluate the level and distribution of genetic variation throughout much of the native range of the tree. Genetic variation in areas affected by anthracnose was as high as or higher than areas without die-offs. We found evidence of four widespread, spatially contiguous genetic clusters. However, there was little relationship between geographic distance and genetic difference. These observations suggest that high dispersal rates and large effective population sizes have so far prevented rapid loss of genetic diversity. The effects of anthracnose on demography and community structure are likely to be far more consequential than short-term genetic effects.
authors.affiliation: Department of Entomology and Plant Pathology, The University of Tennessee, 2431 Joe Johnson Dr, Knoxville, TN, 37996-4560, USA.
authors.forename: D
authors.initials: D
authors.lastname: Hadziabdic
authors.forename: B M
authors.initials: BM
authors.lastname: Fitzpatrick
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: P A
authors.initials: PA
authors.lastname: Wadl
authors.forename: T A
authors.initials: TA
authors.lastname: Rinehart
authors.forename: B H
authors.initials: BH
authors.lastname: Ownley
authors.forename: M T
authors.initials: MT
authors.lastname: Windham
authors.forename: R N
authors.initials: RN
authors.lastname: Trigiano
mesh_terms: D029768:Cornus / Q000235:genetics* / Q000382:microbiology; D018744:DNA, Plant / Q000235:genetics / Q000378:metabolism; D017343:Genes, Plant; D014644:Genetic Variation; D005828:Genetics, Population; D018895:Microsatellite Repeats; D005810:Multigene Family; D010935:Plant Diseases / Q000235:genetics*; D011156:Population Density; D014481:United States
chemical_list: D018744:DNA, Plant
references.citation: Evolution. 1977 Jun;31(2):347-356
references.pmid: 28563234
references.citation: Ecol Appl. 2008 Mar;18(2):360-76
references.pmid: 18488602
references.citation: Genetics. 1943 Mar;28(2):114-38
references.pmid: 17247074
references.citation: Evol Bioinform Online. 2007 Feb 23;1:47-50
references.pmid: 19325852
references.citation: Mol Ecol. 2006 Jan;15(1):263-75
references.pmid: 16367845
references.citation: Genetics. 1992 Jun;131(2):479-91
references.pmid: 1644282
references.citation: Genetics. 2000 Jun;155(2):945-59
references.pmid: 10835412
references.citation: Science. 1988 Sep 16;241(4872):1455-60
references.pmid: 3420403
references.citation: Genetics. 1946 Jan;31:39-59
references.pmid: 21009706
references.citation: Mol Ecol. 2006 Dec;15(14):4261-93
references.pmid: 17107465
references.citation: Mol Ecol. 2005 Jul;14(8):2611-20
references.pmid: 15969739
references.citation: Genetics. 1931 Mar;16(2):97-159
references.pmid: 17246615
references.citation: Theor Popul Biol. 2001 Nov;60(3):227-37
references.pmid: 11855957
references.citation: Mol Biol Evol. 2000 Sep;17(9):1277-85
references.pmid: 10958844
references.citation: Mol Phylogenet Evol. 2008 Mar;46(3):1049-70
references.pmid: 18055224
references.citation: Theor Appl Genet. 1996 May;92(7):832-9
references.pmid: 24166548
references.citation: Genetics. 1997 Aug;146(4):1441-52
references.pmid: 9258686
references.citation: Am J Bot. 2005 Feb;92(2):262-71
references.pmid: 21652403
references.citation: Evolution. 2001 Sep;55(9):1717-33
references.pmid: 11681728
references.citation: J Hered. 2002 Mar-Apr;93(2):153-4
references.pmid: 12140277