Abstract
The species Syagrus oleracea is a native palm tree, present in highly impacted environments of the Brazilian semiarid. This species is exploited for use in the manufacture of folk crafts and for human and animal feeding. The objective of this study was to characterize the diversity and genetic structure of individuals from different populations, located in anthropic regions of the Brazilian semiarid region, in the state of Minas Gerais. This information is important for species management and conservation strategies. Thus, we used ISSR molecular markers in 157 individuals in seven populations of S. oleracea. Looking at the results, one can observe that amplifications of 109 locos occurred and that an average of 18, 17 alleles were found on each primer, values that demonstrated that the ISSR technique used was highly efficient. The genetic diversity indexes were observed, showing expected heterozygosity (He) and Shannon index (I) of 0.260 and 0.383, respectively. The number of alleles observed (na) among populations was 1.954 and the effective number of alleles (ne) was 1,606. Individuals of the populations are genetically structured in groups (demes) in a random and aggregate manner. We obtained the amplification of 109 ISSR loci, with a mean of 18.2 alleles per primer. The genetic diversity indexes revealed expected heterozygosity (He) and Shannon index (I) of 0.260 and 0.383, respectively. The number of alleles observed (na) was 1.954 and the effective number of alleles (ne) was 1.606. The value of the indirect gene flow found was 1.546. Evidence of high levels of kinship in populations was found, possibly due to low migration rates and geographical barrier. In addition, we observed signs of overexploitation in the areas, which consequently leads to a low rate of gene flow, occurring inbreeding among the sampled populations of Syagrus oleracea.
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Claims 11
Claim · model-written summary
ISSR markers amplified 109 loci in Syagrus oleracea.
- Taxon
- Syagrus oleracea
Syagrus oleraceae0 - Outcome
- amplificatione1
- Value
- 109 ISSR locie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e1“We obtained the amplification of 109 ISSR loci, with a mean of 18.2 alleles per primer”
Claim · model-written summary
ISSR markers gave a mean of 18.2 alleles per primer in Syagrus oleracea.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- alleles per primere1
- Value
- 18.2 allelese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e1“We obtained the amplification of 109 ISSR loci, with a mean of 18.2 alleles per primer”
Claim · model-written summary
Expected heterozygosity of Syagrus oleracea populations was 0.260.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- expected heterozygositye2
- Value
- 0.260e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e2“showing expected heterozygosity (He) and Shannon index (I) of 0.260 and 0.383”
Claim · model-written summary
Shannon index of Syagrus oleracea populations was 0.383.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- Shannon index (I)e2
- Value
- 0.383e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e2“showing expected heterozygosity (He) and Shannon index (I) of 0.260 and 0.383”
Claim · model-written summary
The number of alleles observed (na) among populations was 1.954.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- number of alleles observed (na)e3
- Value
- 1.954e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e3“The number of alleles observed (na) was 1.954 and the effective number of alleles (ne) was 1.606”
Claim · model-written summary
The effective number of alleles (ne) was 1.606.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- effective number of alleles (ne)e3
- Value
- 1.606e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e3“The number of alleles observed (na) was 1.954 and the effective number of alleles (ne) was 1.606”
Claim · model-written summary
Indirect gene flow among Syagrus oleracea populations was 1.546.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- indirect gene flowe4
- Value
- 1.546e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e4“The value of the indirect gene flow found was 1.546”
Claim · model-written summary
Individuals of the Syagrus oleracea populations are genetically structured in groups (demes) in a random and aggregate manner.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- genetically structured in groups (demes)e5
- Qualifier
- random and aggregate mannere5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e5“Individuals of the populations are genetically structured in groups (demes) in a random and aggregate manner”
Claim · model-written summary
High levels of kinship were found in populations, possibly due to low migration rates and a geographical barrier.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- high levels of kinship in populationse6
- Qualifier
- possibly due to low migration rates and geographical barriere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e6“Evidence of high levels of kinship in populations was found, possibly due to low migration rates and geographical barrier”
Claim · model-written summary
Overexploitation is associated with inbreeding among the sampled Syagrus oleracea populations.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- inbreeding among the sampled populationse7
- Qualifier
- signs of overexploitation in the arease7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e7“signs of overexploitation in the areas, which consequently leads to a low rate of gene flow, occurring inbreeding among the sampled populations of Syagrus oleracea”
Claim · model-written summary
The sampled Syagrus oleracea populations show a low rate of gene flow.
- Taxon
- Syagrus oleraceaSyagrus oleraceae0
- Outcome
- low rate of gene flowe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species Syagrus oleracea is a native palm tree”
e7“signs of overexploitation in the areas, which consequently leads to a low rate of gene flow, occurring inbreeding among the sampled populations of Syagrus oleracea”