Depicting the mating system and patterns of contemporary pollen flow in trees of the genus Anadenanthera (Fabaceae)

Autor(es)

Feres, Juliana Massimino ^[1] ; Nazareno, Alison G. ^[2] ; Borges, Leonardo M. ^[3] ; Guidugli, Marcela Corbo ^[1] ; Bonifacio-Anacleto, Fernando ^[1] ; Alzate-Marin, Ana Lilia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Med Ribeirao Preto, Dept Genet, Programa Posgrad Genet, Ribeirao Preto, SP - Brazil

^[2] Univ Fed Minas Gerais, Dept Genet Ecol & Evolucao, Belo Horizonte, MG - Brazil

^[3] Univ Fed Sao Carlos, Dept Bot, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PeerJ; v. 9, APR 7 2021.
• Citações Web of Science: 0

Resumo

Anadenanthera (Fabaceae) is endemic to the Neotropics and consists of two tree species: A. colubrina (Vell.) Brenan and A. peregrina (L.) Speg. This study examined the mating system and contemporary gene flow of A. colubrina (Acol) and A. peregrina (Aper) in a highly fragmented area of the Atlantic Forest to provide valuable information that informs conservation strategies. Reproductive adults from forest remnants {[}n(A. colubrina) = 30 (2.7 ha), n(A. peregrina) = 55 (4.0 ha)] and progeny-arrays (n(A. colubrina) = 322, n(A. peregrina) = 300) were genotyped for seven nuclear microsatellite markers. Mating system analyses revealed that A. colubrina is a mixed mating species (t(m) = 0.619) while A. peregrina is a predominantly outcrossing species (t(m) = 0.905). For both Anadenanthera species, high indices of biparental inbreeding were observed (Acol = 0.159, Aper = 0.216), resulting in low effective pollination neighborhood sizes. Categorical paternity analysis revealed different scales of pollen dispersal distance: the majority of crossings occurring locally (i.e., between nearby trees within the same population), with moderate pollen dispersal coming from outside the forest fragments boundaries (Acol(mp) = 30%, Aper(mp) = 35%). Nevertheless, pollen immigration from trees outside the populations for both species suggests that the populations are not reproductively isolated. This study highlights the importance of evaluating both mating system and contemporary gene flow for a better understanding of the biology of Anadenanthera species. This information should be considered to ensure the effective conservation and management practices of these plant species. (AU)

• Processo FAPESP: 09/14200-6 - Diversidade genética, fluxo gênico e sistema de cruzamento de Anadenathera colubrina (Vell.) Brenan e Anadenanthera peregrina (L.) Speg: duas espécies que ocorrem em alta densidade em pequenas populações no interior do estado de São Paulo
• Beneficiário: Juliana Massimino Feres
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 11/08883-3 - Padrões de cruzamento e fluxo gênico em dois eventos reprodutivos de duas espécies florestais que ocorrem em remanescentes naturais da região de Ribeirão Preto (SP)
• Beneficiário: Ana Lilia Alzate Marin
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 07/04787-4 - Fluxo de polen e isolamento genetico de cariniana estrellensis (raddi) kuntze (lecythidaceae) em fragmento localizado no interior de sao paulo.
• Beneficiário: Marcela Corbo Guidugli
• Modalidade de apoio: Bolsas no Brasil - Doutorado