

FOLLOWUS
Institute of Evolution and Ecology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
CAO Qianjin, caoqj1009@163.com, caoqj1009@mail.ccnu.edu.cn
收稿:2019-03-14,
录用:2019-7-9,
网络首发:2020-11-11,
纸质出版:2020-11
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Local-scale patterns of genetic variation in coexisting floating-leaved
Qianjin CAO, Feiyang HU, Na LIU. Local-scale patterns of genetic variation in coexisting floating-leaved
Local-scale patterns of genetic variation in coexisting floating-leaved
Qianjin CAO, Feiyang HU, Na LIU. Local-scale patterns of genetic variation in coexisting floating-leaved
Coexisting floating-leaved and submerged plants experience similar environmental changes but may evolve different patterns of genetic variation. To compare local-scale genetic variation
we collected samples of floating-leaved
Nymphoides peltata
and submerged
Myriophyllum spicatum
coexisting in a disturbed urban lake in China. At the subpopulation level
using microsatellites
M. spicatum
had higher clonal diversity than
N. peltata. M. spicatum
had 28.4% multilocus genotypes (MLGs) shared between subpopulations
but
N. peltata
had only one MLG shared between two adjacent subpopulations.
N. peltata
displayed more genetic variation between subpopulations than within subpopulations
but the reverse was true for
M. spicatum
. Principal components and Bayesian cluster analyses showed that individuals from each subpopulation of
N. peltata
tended to have relatively close genetic relationships. For
M. spicatum
individuals from each subpopulation were genetically scattered with those from other subpopulations. Our results imply that in unpredictable adverse environments
M. spicatum
may be less subjected to local-deme extinction than
N. peltata
because of genetically diverse clones at the subpopulation level. This characteristic means that following adverse events
M. spicatum
may rapidly restore subpopulation distributions via recolonization and intense gene flow among subpopulations.
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