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REPRODUCTIVE SYSTEM AND POLLEN FLOW IN PROGENIES OF Qualea grandiflora Mart., A TYPICAL SPECIES OF THE BRAZILIAN CERRADO
- Source :
- Revista Árvore, Vol 39, Iss 2, Pp 337-344 (2015), Revista Árvore v.39 n.2 2015, Revista Árvore, Universidade Federal de Viçosa (UFV), instacron:SIF
- Publication Year :
- 2015
- Publisher :
- Sociedade de Investigações Florestais, 2015.
-
Abstract
- This study analyzed the reproductive system and the pollen dispersion pattern of Qualea grandiflora progenies. This is a typical species from the Brazilian Cerrado about which there are not too many studies from the genetics point of view. The study was conducted in an area of 2.2 hectares located in the Conservation Unit managed by the Forest Institute of the state of São Paulo, Brazil (Assis State Forest). Total genomic DNA of 300 seeds from 25 plants (12 seeds from each plant) was extracted and amplified using specific primers to obtain microsatellite markers. Results showed that selfing is frequent among adults and progenies, and the species reproduces by outcrossing between related and unrelated individuals (0.913). The single-locus outcrossing rate was 0.632, which indicates that mating between unrelated individuals is more frequent than between related plants. The selfing rate was low (0.087), that is, the species is allogamous and self-fertilization is reduced. About 35% of the plants in the progenies were full-sibs, and about 57%, half-sibs. Besides, about 8% of the progenies were selfing siblings. The genetic differentiation coefficient within progenies was 0.139, whereas the fixation rate was about 27%. The estimate of the effective size revealed that the genetic representativeness of descent was lower than expected in random mating progenies: The analyzed samples corresponded to only 13.2 individuals of an ideal panmictic population. In environmental recovery programs, seeds, preferably from different fruits, should be collected from 95 trees to preserve the genetic diversity of the species.
- Subjects :
- Conservation genetics
Diversidade genética
education.field_of_study
Panmixia
Genetic diversity
Population
Selfing
Forestry
Outcrossing
Biology
medicine.disease_cause
SSR
Fixation (population genetics)
Pollen
Genética da Conservação
Botany
medicine
lcsh:SD1-669.5
lcsh:Forestry
education
Microssatélites
Subjects
Details
- Language :
- English
- ISSN :
- 18069088
- Volume :
- 39
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Revista Árvore
- Accession number :
- edsair.doi.dedup.....9151b226a45415f803ae5413601084b8