Abstract
In this study on Dalmatian pyrethrum ( Tanacetum cinerariifolium (Trevir.) Sch.Bip.), we combined genetic analysis and ecological niche modeling to investigate the intraspecific diversity, genetic structure, historical and contemporary distribution, and factors determining the observed diversification patterns of this endemic species from the eastern Adriatic coast. The study included 12 newly developed microsatellite markers that exhibited high polymorphism allowing the characterization of different populations. The level of genetic diversity ( H E ) ranged from 0.399 to 0.616, with an average value of 0.534. Genetic differentiation ( F ST ) between populations was 0.178. Most of the genetic diversity was attributed to differences among individuals within populations, but highly significant φ ST values indicate the existence of genetic differentiation among populations. Bayesian analysis of population structure revealed the existence of two to four genetic clusters, and a correlation was found between environmental conditions and genetic clustering patterns, suggesting that local ecological conditions contributed to the emergence of distinct genetic patterns. The results of ecological niche modeling suggest that the Pleistocene climate has shaped the patterns of demographic history and diversification of this species in accordance with the refugia-within-refugia hypothesis. Understanding genetic diversity and structure provides important baseline information for the conservation of T. cinerariifolium genetic resources and for future breeding programs.
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Claims 8
Claim · model-written summary
Twelve new microsatellite markers showed high polymorphism for characterizing Dalmatian pyrethrum populations.
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Verbatim
e0“12 newly developed microsatellite markers that exhibited high polymorphism allowing the characterization of different populations”
Claim · model-written summary
Expected genetic diversity among Dalmatian pyrethrum populations ranged from 0.399 to 0.616, averaging 0.534.
Not reportedTaxon
Verbatim
e0“The level of genetic diversity ( H E ) ranged from 0.399 to 0.616, with an average value of 0.534”
Claim · model-written summary
Genetic differentiation between Dalmatian pyrethrum populations was 0.178.
Not reportedTaxon
Verbatim
e0“Genetic differentiation ( F ST ) between populations was 0.178”
Claim · model-written summary
Most genetic diversity was among individuals within populations.
Not reportedTaxon
Verbatim
e0“Most of the genetic diversity was attributed to differences among individuals within populations”
Claim · model-written summary
Significant population differentiation was detected by φ ST.
Not reportedTaxon
Verbatim
e0“highly significant φ ST values indicate the existence of genetic differentiation among populations”
Claim · model-written summary
Population structure analysis found two to four genetic clusters.
Not reportedTaxon
Verbatim
e0“Bayesian analysis of population structure revealed the existence of two to four genetic clusters”
Claim · model-written summary
Environmental conditions correlated with genetic clustering patterns.
Not reportedTaxonDirection
Verbatim
e0“a correlation was found between environmental conditions and genetic clustering patterns”
Claim · model-written summary
Ecological niche modeling suggested that Pleistocene climate shaped demographic history and diversification.
- Outcome
- patterns of demographic history and diversificatione0
- Qualifier
- in accordance with the refugia-within-refugia hypothesise0
- Setting
- Pleistocene climatee0
Not reportedTaxonDirection
Verbatim
e0“The results of ecological niche modeling suggest that the Pleistocene climate has shaped the patterns of demographic history and diversification of this species in accordance with the refugia-within-refugia hypothesis”