Genetic Diversity and Fine-scale Genetic Structure in Syagrus oleracea (Mart.) Becc.: A Survivor Palm Species of the Semiarid | Chapter 09 | Research and Development in Agricultural Sciences Vol. 1
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.
Author(s) Details
Luciana Rodrigues de Souza
Laboratory Bioprospecting
and Genetic Resources and Laboratory of Natural Products, State University of
Montes Claros, Campus Darcy Ribeiro, Vila Mauriceia, Montes Claros, MG, Brazil.
Helbert Fagundes Soares
Laboratory Bioprospecting
and Genetic Resources and Laboratory of Natural Products, State University of
Montes Claros, Campus Darcy Ribeiro, Vila Mauriceia, Montes Claros, MG, Brazil.
Sara Luiza Ramos Ribeiro
Laboratory Bioprospecting
and Genetic Resources and Laboratory of Natural Products, State University of
Montes Claros, Campus Darcy Ribeiro, Vila Mauriceia, Montes Claros, MG, Brazil.
Afranio Farias de Melo
Junior
Laboratory Bioprospecting
and Genetic Resources and Laboratory of Natural Products, State University of
Montes Claros, Campus Darcy Ribeiro, Vila Mauriceia, Montes Claros, MG, Brazil.
Murilo Malveira Brandao
Laboratory Bioprospecting
and Genetic Resources and Laboratory of Natural Products, State University of
Montes Claros, Campus Darcy Ribeiro, Vila Mauriceia, Montes Claros, MG, Brazil.
Elytania Veiga Menezes
Laboratory Bioprospecting
and Genetic Resources and Laboratory of Natural Products, State University of
Montes Claros, Campus Darcy Ribeiro, Vila Mauriceia, Montes Claros, MG, Brazil.
Vanessa de Andrade Royo
Laboratory Bioprospecting
and Genetic Resources and Laboratory of Natural Products, State University of
Montes Claros, Campus Darcy Ribeiro, Vila Mauriceia, Montes Claros, MG, Brazil.
Dario Alves de Oliveira
Laboratory Bioprospecting
and Genetic Resources and Laboratory of Natural Products, State University of
Montes Claros, Campus Darcy Ribeiro, Vila Mauriceia, Montes Claros, MG, Brazil.
Comments
Post a Comment