Fragmentation and environmental constraints influence genetic diversity and germination of Stipa pennata in natural steppes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10337214" target="_blank" >RIV/00216208:11310/16:10337214 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.flora.2016.06.003" target="_blank" >http://dx.doi.org/10.1016/j.flora.2016.06.003</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.flora.2016.06.003" target="_blank" >10.1016/j.flora.2016.06.003</a>
Alternative languages
Result language
angličtina
Original language name
Fragmentation and environmental constraints influence genetic diversity and germination of Stipa pennata in natural steppes
Original language description
Human impact and fragmentation often have negative effects on plant population sizes. This can lead to declining genetic diversity due to restricted gene flow and genetic bottlenecks, and eventually result in reduced reproductive fitness. Environmental conditions can also influence the genetic structure of populations and directly affect their reproduction success. For Stipa pennata, the key species of largely natural steppes in southern Siberia, using AFLP we tested whether genetic variability and germination are negatively influenced by fragmentation, and assessed the influence of local environmental conditions. Genetic diversity was moderately high (mean percentage of polymorphic bands = 38.4%), with high genetic differentiation occurring between populations (Phi(ST) = 0.547). Genetic variation was mainly partitioned (41.8%) between two distinct grassland types. Isolation negatively affected genetic diversity, highlighting that fragmentation had an impact on genetic structure. Higher mean precipitation negatively influenced population size, population density and genetic diversity. The speed of seed germination was correlated positively with population size and negatively with vegetation cover, while we found no evidence for negative effects of low genetic diversity on percentage of seed germination. The presence of different genetic groups shows that populations have adapted to a range of environments. Germination speed also differed between groups, as a consequence of maternal effects or of adaption to certain environmental conditions. Our results show that fragmentation can have potentially strong effects even in natural grasslands. We recommend that any future restoration schemes take the observed pronounced genetic differentiation into account.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EF - Botany
OECD FORD branch
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Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Flora
ISSN
0367-2530
e-ISSN
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Volume of the periodical
224
Issue of the periodical within the volume
September 2016
Country of publishing house
DE - GERMANY
Number of pages
8
Pages from-to
42-49
UT code for WoS article
000392563300006
EID of the result in the Scopus database
2-s2.0-84978761885