10.5061/DRYAD.63FR7
Roe, Amanda D.
Canadian Forest Service
Natural Resources Canada
MacQuarrie, Chris J. K.
Natural Resources Canada
Gros-Louis, Marie-Claude
Canadian Forest Service
Simpson, J. Dale
Natural Resources Canada
Lamarche, Josyanne
Canadian Forest Service
Beardmore, Tannis
Natural Resources Canada
Thompson, Stacey L.
Canadian Forest Service
Umeå University
Tanguay, Philippe
Canadian Forest Service
Isabel, Nathalie
Canadian Forest Service
Data from: Fitness dynamics within a poplar hybrid zone: I. Prezygotic and
postzygotic barriers impacting a native poplar hybrid stand.
Dryad
dataset
2015
Populus deltoides
SNPs
Melampsora sp.
reproductive fitness
Holocene
postzygotic fitness
Populus balsamifera
2015-03-17T00:00:00Z
2015-03-17T00:00:00Z
en
https://doi.org/10.1002/ece3.1029
992159 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Hybridization and introgression are pervasive evolutionary phenomena that
provide insight to the selective forces that maintain species boundaries,
permit gene flow and control the direction of evolutionary change. Poplar
trees (Populus L.) are well known for their ability to form viable hybrids
and maintain their distinct species boundaries despite this interspecific
gene flow. We sought to quantify the hybridization dynamics and
postzygotic fitness within a hybrid stand of balsam poplar (Populus
balsamifera L.), eastern cottonwood (P. deltoides Marsh.) and their
natural hybrids to gain insight to the barriers maintaining this stable
hybrid zone. We observed asymmetrical hybrid formation with P. deltoides
acting as the seed parent, but with subsequent introgression biased
towards P. balsamifera. Native hybrids expressed fitness traits
intermediate to the parental species and were not universally unfit. That
said, native hybrid seedlings were absent from the seedling population,
which may indicate additional selective pressures controlling their
recruitment. It is imperative that we understand the selective forces
maintaining this native hybrid zone in order to quantify the impact of
exotic poplar hybrids on this native system.
R code for analysis of fitness dataAll R code associated with the
manuscript are included. The file has been extensively commented as
well.All analysesNativePoplar_submit.RTree stand characteristicsThis file
contains the tree height, diameter at breast height, age classification,
and genotype.Stand_TreeData.csvBiomass and yield fitness traitsThis file
contains the following biomass fitness traits: total catkin biomass, total
seed biomass, 100 seed biomass, capsule biomass, stem biomass, and cotton
biomass. It also contains the following yield measurements: capsules per
catkin, seeds per capsule, and seeds per catkin.Biomass.csvGerminationThis
file contains two measures of germination success, as well as tree
genotype class: germination success and number of abnormal
germinants.Disease SusceptibilityThis file contains the results of the
controlled inoculation of trees with three fungal diseases: Melampsora
larici-populina, M. medusae f.sp. deltoidae, and M. occidentalis.
Susceptibility was measured by number of uredia by unit
area.Inoculations.csvStructure file for genotype assignmentThis file
contains the recoded SNP data for input into Structure to estimate
admixture in each individual.BPSF_NativeOnly_CompleteRef.xlsNew Hybrid
data fileThe file contains the recoded genotype data for each tree for
analysis in New Hybrids.BPSF_NativeOnly_NH.txt
Quebec City
Quebec