Banca de DEFESA: RAIANE PEREIRA DE SALES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RAIANE PEREIRA DE SALES
DATE: 29/07/2020
TIME: 09:30
LOCAL: Sala virtual (Google Meet): https://meet.google.com/gnp-fphw-wnx
TITLE:

POPULATION ECOLOGY, GENETIC DIVERSITY AND MODELING OF THE ECOLOGICAL NICHE OF Spondias tuberosa Arruda

KEY WORDS:

umbu, extractivism, Caatinga, Environmental Suitability, Molecular Marker

PAGES: 101
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Silvicultura
SPECIALTY: Genética e Melhoramento Florestal
SUMMARY:

Spondias tuberosa (Anacardiaceae) is a tree native to Brazil with outstanding relevance in plant extraction. In fact, in the last three years, the amount produced in the vegetal extraction of fruits and the value of production were 23,777 tons and R $ 27 million, respectively. The objective of this study was to evaluate the spatial pattern, the biometry of the fruits, allometric variations and the intrapopulational genetic diversity, in addition to modeling areas of environmental suitability for S. tuberosa in climate change scenarios. The analysis of the genetic diversity of adult reproductive individuals was carried out using  molecular markers of Simple Sequence Inter Repetitions (ISSR). The maximum entropy algorithm (Maxent) was used in niche modeling for the present and future period, with two scenarios and four models of general atmosphere circulation being tested. The spatial pattern was aggregated, with a higher density of neighbors (NDF) within a radius of up to 55 m. The correlations between diameter at breast height, total height and canopy area were positive and significant (P <0.0001). The fruits had a length of 20.05 mm to 39.02 mm and a diameter between 17.73 mm and 35.48 mm, and the fresh mass with 11 g to 26.47 g. The fresh weight of fruits and diaspores showed the highest values of the variation coefficient. The greatest correlation was between fresh fruit mass and pulp yield (rs = 0.99). Nei's genetic diversity index was 0.37 (± 0.07) and Shannon's index was 0.55 (± 0.11). The Bayesian analysis defined four distinct genetic groups (K = 4). The state of Bahia had the highest production and commercialization of fruits in the years 1994 to 2018. The bioclimatic variable with the highest percentage of contribution to the suitability of S. tuberosa was annual precipitation (75.3%). It is concluded that the morphological and genetic characterization contributes to the conservation of S. tuberosa, so that it provides strategies such as the selection of genotypes for both commercial activities, to encourage extraction and the creation of germplasm banks, given  their socio-economic importance. It was found that the species had an increase in the areas of suitability in the Caatinga domain in the optimistic scenario, especially in Rio Grande do Norte, northern Bahia and northern Minas Gerais. It is suggested that these areas have a greater focus on management plans and conservation of the species.

BANKING MEMBERS:
Presidente - 1715697 - FABIO DE ALMEIDA VIEIRA
Interno - 2257836 - PAULO SERGIO MARINHO LUCIO
Interna - 2326526 - TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
Externo à Instituição - AFRÂNIO FARIAS DE MELO JÚNIOR - UNIMONTES
Externo à Instituição - MURILO MALVEIRA BRANDÃO - UNIMONTES