Genetic structure of two Prosopis species in Chaco areas: A lack of allelic diversity diagnosis and insights into the allelic conservation of the affected species

Autor(es)

Alves, Fabio M. ^{[1, 2]} ; Sartori, Angela L. B. ^[3] ; Zucchi, Maria I. ^[4] ; Azevedo-Tozzi, Ana M. G. ^[1] ; Tambarussi, Evandro V. ^[5] ; Alves-Pereira, Alessandro ^[2] ; de Souza, Anete P. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Plant Biol, Inst Biol, UNICAMP, Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Ctr Mol Biol & Genet Engn CBMEG, UNICAMP, Campinas, SP - Brazil

^[3] Univ Fed Mato Grosso, Ctr Biol & Hlth Sci CCBS, UFMS, Campo Grande, MS - Brazil

^[4] Sao Paulo Agcy Technol & Agrobusiness, Piracicaba, SP - Brazil

^[5] Univ Midwest, Dept Forestry Engn, Irati, PR - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOLOGY AND EVOLUTION; v. 8, n. 13, p. 6558-6574, JUL 2018.
• Citações Web of Science: 2

Resumo

The Gran Chaco is the largest continuous region of the South American dry forest, spanning Argentina, Paraguay, Bolivia, and Brazil. Prosopis rubriflora and Prosopis ruscifolia are typical tree species of chaquenian area forests, which have been subjected to continuous fragmentation caused by cattle raising. This study evaluated P.rubriflora and P.ruscifolia in areas with varying levels of disturbance. We investigated the contemporary genetic diversities of both species in areas with distinct anthropogenic disturbances. Even with a lower heterozygote frequency, disturbed areas can provide important storage for alleles, allowing the maintenance of diversity. The genetic diversity of P.rubriflora was surprisingly similar to that of P.ruscifolia (H-e=0.59 and H-e=0.60, respectively) even with very different distribution ranges of both species. However, P.ruscifolia exhibited a higher intrapopulation fixation index than P.rubriflora. P.rubriflora showed evidence of bottlenecking in 64% of the sampled areas, while P.ruscifolia showed such evidence in 36% of the sampled areas. Additionally, P.rubriflora had two distinct populations due to its disjunctive geographic distribution, whereas P.ruscifolia had a single population that exhibited few signs of population structure in some areas, possibly due to the main pollinators presenting a short range of dispersion. Our results suggest that 42 Chaco areas should be conserved to retain the minimum of 500 individuals necessary to maintain genetic diversity for 100-1,000 generations. This study improves our understanding of these two Prosopis species and provides information for the conservation of their genetic diversities. (AU)

• Processo FAPESP: 08/52197-4 - Genomic-assisted breeding of sugarcane: using molecular markers for understanding the genetic architecture of quantitative traits and to implement marker assisted selection
• Beneficiário: Anete Pereira de Souza
• Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Temático
• Processo FAPESP: 10/51242-6 - Leguminosas lenhosas no Chaco brasileiro: uma abordagem florística, fitogeográfica e genética
• Beneficiário: Fábio de Matos Alves
• Linha de fomento: Bolsas no Brasil - Doutorado