Reduced genetic diversity and enhanced germination potential characterize European black locust (Robinia pseudoacacia L.)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F18%3A43914541" target="_blank" >RIV/62156489:43410/18:43914541 - isvavai.cz</a>

Výsledek na webu

<a href="http://nnext.boku.ac.at/images/publications/NNEXT_Conference_2018_Book_of_Abstracts.pdf" target="_blank" >http://nnext.boku.ac.at/images/publications/NNEXT_Conference_2018_Book_of_Abstracts.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Reduced genetic diversity and enhanced germination potential characterize European black locust (Robinia pseudoacacia L.)

Popis výsledku v původním jazyce

Robinia pseudoacacia L. is a North American tree which has now broadly spread in Europe. In order to evaluate the evolutionary mechanisms behind its invasiveness, it is crucial to identify the population sources of the introduction and to understand which traits contributed to its success in the European range. To undertake a population genetics study, we performed a large sampling both in the invasive and native ranges; 818 individuals from 63 populations were genotyped using 113 SNPs. We detected clonal genotypes in each population and analyzed population structure both between and within ranges and then, we compared the genetic diversity among ranges. First, we demonstrated that European black locust was introduced from only a limited number of populations located in the plateau of the Appalachians Mountains; this is in agreement with historical records. Within America, population structure reflected long time evolutionary processes whereas in Europe, it was largely impacted by human activities. In the European range, the genetic clustering may be a signal of evolution caused by artificial selection due to human oriented mass selection or tree breeding initiated in Central Europe since the 18th century. Second, we evidenced a genetic bottleneck among ranges with a decrease in allelic richness and in the total number of alleles in Europe. Lastly, we found more clonality within the European populations. Conjointly to the population genetic analysis, we conducted a quantitative genetics experiment to evaluate juvenile traits of both native and invasive black locust populations (3000 individuals from 20 populations) grown under 3 different temperature conditions (18oC, 22oC and 31oC). Results revealed an enhanced germination rate among European populations compared to that of the native American populations whatever the environmental condition (88% vs 60%). Thus a possible scenario may be that Man would have selected and propagated the best seeds in the new range that would have favored an evolution of germination rate through European populations. In any case, the human role on the reproductive potential, both sexual and asexual, within the introduced range would likely be a key process in the success of black locust dynamics in Europe.

Název v anglickém jazyce

Reduced genetic diversity and enhanced germination potential characterize European black locust (Robinia pseudoacacia L.)

Popis výsledku anglicky

Robinia pseudoacacia L. is a North American tree which has now broadly spread in Europe. In order to evaluate the evolutionary mechanisms behind its invasiveness, it is crucial to identify the population sources of the introduction and to understand which traits contributed to its success in the European range. To undertake a population genetics study, we performed a large sampling both in the invasive and native ranges; 818 individuals from 63 populations were genotyped using 113 SNPs. We detected clonal genotypes in each population and analyzed population structure both between and within ranges and then, we compared the genetic diversity among ranges. First, we demonstrated that European black locust was introduced from only a limited number of populations located in the plateau of the Appalachians Mountains; this is in agreement with historical records. Within America, population structure reflected long time evolutionary processes whereas in Europe, it was largely impacted by human activities. In the European range, the genetic clustering may be a signal of evolution caused by artificial selection due to human oriented mass selection or tree breeding initiated in Central Europe since the 18th century. Second, we evidenced a genetic bottleneck among ranges with a decrease in allelic richness and in the total number of alleles in Europe. Lastly, we found more clonality within the European populations. Conjointly to the population genetic analysis, we conducted a quantitative genetics experiment to evaluate juvenile traits of both native and invasive black locust populations (3000 individuals from 20 populations) grown under 3 different temperature conditions (18oC, 22oC and 31oC). Results revealed an enhanced germination rate among European populations compared to that of the native American populations whatever the environmental condition (88% vs 60%). Thus a possible scenario may be that Man would have selected and propagated the best seeds in the new range that would have favored an evolution of germination rate through European populations. In any case, the human role on the reproductive potential, both sexual and asexual, within the introduced range would likely be a key process in the success of black locust dynamics in Europe.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů