10.25338/B8QS5T
Mesgaran, Mohsen
0000-0002-0841-6188
University of California, Davis
Li, Chengjun
Guangzhou University
Ohadi, Sara
University of California, Davis
Asymmetry in fitness-related traits of later-generation hybrids between
two invasive species
Dryad
dataset
2020
2021-12-15T00:00:00Z
2021-02-13T00:00:00Z
en
https://doi.org/10.1002/ajb2.1583
97199 bytes
6
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Premise: Most studies on the importance of hybridisation to invasions have
focused on the comparison of fitness-related traits between F1 hybrids and
their parents whilst different fitness landscapes could emerge in later
generations after hybrids cross with each other (i.e. F2) or backcross
with their parents. Methods: In this study, artificial crosses were
conducted to generate F1, F2 and backcrosses between two invasive species:
Cakile edentula (self-compatible) and Cakile maritima (self-incompatible).
Putative hybrids were also collected from the sympatric zone and compared
with their co-occurring parents for phenotypic and genetic differences.
Results: Genetic data provided evidence of hybridisation happening in the
wild and phenotypic comparisons showed that natural hybrids had
intermediate traits between the two species but showed more similarity to
C. maritima than to C. edentula. The asymmetry was further identified in
artificial generations for several phenotypic characters. Furthermore,
backcrosses exhibited different pattern of variation, with backcrosses to
C. maritima having high reproductive output than their counterparts.
Conclusions: Our study suggests that hybridisation and introgression
(backcrossing) in Cakile species is asymmetric and most likely to favour
the proliferation of C. maritima genes in the mixed population and thus
help its establishment, a finding that could not be predicted by
characterizing F1 hybrids.
In this study, artificial crosses were conducted to generate F1, F2 and
backcrosses between two invasive species: Cakile edentula
(self-compatible) and Cakile maritima (self-incompatible). Putative
hybrids were also collected from the sympatric zone and compared for
phenotypic charcters at two stages (harvest 1 and 2) in a common garden
experiments. Data include measurments of various traits on individual
plants.
Data files for phenotypic traits recorded and comparisons between
different plant populations/families in "Asymmetry in fitness-related
traits of later-generation hybrids between two invasive species" For
the first common garden experiment, there were two rounds of experiments,
i.e., early stages (harvest1) and late stages (harvest2): Harvest1
-Original data file for the phenotypic traits recorded in the first round
of the first common experiment. Details about units and abbreviations can
be found in TABLE 1 of the associated paper. Harvest2 -Original data file
for the phenotypic traits recorded in the second round of the first common
experiment. Details about units and abbreviations can be found in TABLE 2
of the associated paper. pca_eign_hyb_harvest1 - PCA eign values for
“Harvest1”, as present in Figure 4A. pca_eign_hyb_harvest2 - PCA eign
values for “Harvest2”, as present in Figure 4B. pca_scores_hyb_harvest1
-PCA scores for “Harvest1” pca_scores_hyb_harvest2 -PCA scores for
“Harvest2” For the second common garden experiment about artificially
produced hybrids and their parental species, the following file is
available: Chengjun_Experiment -Original data file for the phenotypic
traits recorded in the second common experiment. Details about units and
abbreviations can be found in APPENDIX S2 “Traits measured in the first
and second common garden experiments”.