Abstract
Dwarf mistletoes (Arceuthobium spp., Viscaceae) are ecologically and economically important parasitic flowering plants. Despite detection of morphological and host specialization differences, ribosomal DNA and plastid sequence information have not resolved genetic differentiation among the dwarf mistletoes parasitizing white pines (Pinus subgenus Strobus) in the western U. S. A. We assessed the effectiveness of integrating amplified fragment length polymorphism and morphometric analyses in the delineation of three closely related and morphologically similar species of white pine dwarf mistletoes. Using amplified fragment length polymorphism data for 995 loci, we quantified intra- and inter-specific genetic variation, tested for geographic isolation-by-distance, and visualized genetic patterns using Bayesian-based structure analyses, neighbor-joining tree reconstruction, and principal coordinate analysis ordination. A total of 19 morphological characters were also analyzed using standard statistical methods and discriminant analysis. We found that 13% of the total genetic variation (p = 0.0001) was due to among-species differences, and species were distinguished by tree and ordination plots. Species also differed in estimates of genetic diversity and differentiation, and the degree of isolation-by-distance in genetic structuring. Amplified fragment length polymorphism and morphometric analyses both demonstrated that the dwarf mistletoes examined are well-differentiated genetically and morphologically, and therefore, should be considered distinct species.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 191-207 |
| Number of pages | 17 |
| Journal | Systematic Botany |
| Volume | 40 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2015 |
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Keywords
- AFLP
- genetic diversity
- morphology
- parasitic plants
- Pinus
- population structure
- speciation
- subgenus Strobus
ASJC Scopus subject areas
- Plant Science
- Ecology, Evolution, Behavior and Systematics
- Genetics
Cite this
Genetic structure and morphological differentiation of three western North American dwarf mistletoes (Arceuthobium : Viscaceae). / Reif, Brian P.; Mathiasen, Robert L; Kenaley, Shawn C.; Allan, Gerard J.
In: Systematic Botany, Vol. 40, No. 1, 2015, p. 191-207.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Genetic structure and morphological differentiation of three western North American dwarf mistletoes (Arceuthobium
T2 - Viscaceae)
AU - Reif, Brian P.
AU - Mathiasen, Robert L
AU - Kenaley, Shawn C.
AU - Allan, Gerard J
PY - 2015
Y1 - 2015
N2 - Dwarf mistletoes (Arceuthobium spp., Viscaceae) are ecologically and economically important parasitic flowering plants. Despite detection of morphological and host specialization differences, ribosomal DNA and plastid sequence information have not resolved genetic differentiation among the dwarf mistletoes parasitizing white pines (Pinus subgenus Strobus) in the western U. S. A. We assessed the effectiveness of integrating amplified fragment length polymorphism and morphometric analyses in the delineation of three closely related and morphologically similar species of white pine dwarf mistletoes. Using amplified fragment length polymorphism data for 995 loci, we quantified intra- and inter-specific genetic variation, tested for geographic isolation-by-distance, and visualized genetic patterns using Bayesian-based structure analyses, neighbor-joining tree reconstruction, and principal coordinate analysis ordination. A total of 19 morphological characters were also analyzed using standard statistical methods and discriminant analysis. We found that 13% of the total genetic variation (p = 0.0001) was due to among-species differences, and species were distinguished by tree and ordination plots. Species also differed in estimates of genetic diversity and differentiation, and the degree of isolation-by-distance in genetic structuring. Amplified fragment length polymorphism and morphometric analyses both demonstrated that the dwarf mistletoes examined are well-differentiated genetically and morphologically, and therefore, should be considered distinct species.
AB - Dwarf mistletoes (Arceuthobium spp., Viscaceae) are ecologically and economically important parasitic flowering plants. Despite detection of morphological and host specialization differences, ribosomal DNA and plastid sequence information have not resolved genetic differentiation among the dwarf mistletoes parasitizing white pines (Pinus subgenus Strobus) in the western U. S. A. We assessed the effectiveness of integrating amplified fragment length polymorphism and morphometric analyses in the delineation of three closely related and morphologically similar species of white pine dwarf mistletoes. Using amplified fragment length polymorphism data for 995 loci, we quantified intra- and inter-specific genetic variation, tested for geographic isolation-by-distance, and visualized genetic patterns using Bayesian-based structure analyses, neighbor-joining tree reconstruction, and principal coordinate analysis ordination. A total of 19 morphological characters were also analyzed using standard statistical methods and discriminant analysis. We found that 13% of the total genetic variation (p = 0.0001) was due to among-species differences, and species were distinguished by tree and ordination plots. Species also differed in estimates of genetic diversity and differentiation, and the degree of isolation-by-distance in genetic structuring. Amplified fragment length polymorphism and morphometric analyses both demonstrated that the dwarf mistletoes examined are well-differentiated genetically and morphologically, and therefore, should be considered distinct species.
KW - AFLP
KW - genetic diversity
KW - morphology
KW - parasitic plants
KW - Pinus
KW - population structure
KW - speciation
KW - subgenus Strobus
UR - http://www.scopus.com/inward/record.url?scp=84923340896&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84923340896&partnerID=8YFLogxK
U2 - 10.1600/036364415X686503
DO - 10.1600/036364415X686503
M3 - Article
AN - SCOPUS:84923340896
VL - 40
SP - 191
EP - 207
JO - Systematic Botany
JF - Systematic Botany
SN - 0363-6445
IS - 1
ER -