Natural hybridization and genetic and morphological variation between two epiphytic bromeliads

Author(s)

Neri, Jordana ^[1] ; Wendt, Tania ^[2] ; Palma-Silva, Clarisse ^[3]

Affiliation

^[1] Univ Fed Rio de Janeiro, Museu Nacl, Dept Bot, Programa Pos Grad Bot, BR-20940040 Rio De Janeiro, RJ - Brazil

^[2] Univ Fed Rio de Janeiro, Inst Biol, Dept Bot, BR-21941590 Rio De Janeiro, RJ - Brazil

^[3] Univ Estadual Paulista, Dept Ecol, Programa Pos Grad Ecol, Ave 24A 1515, BR-13506900 Rio Claro, SP - Brazil

• Document type: Journal article
• Source: AOB PLANTS; v. 10, n. 1 FEB 2018.
• Web of Science Citations: 5

Abstract

Reproductive isolation is of fundamental importance for maintaining species boundaries in sympatry. Here, we examine the genetic and morphological differences between two closely related bromeliad species: Vriesea simplex and Vriesea scalaris. Furthermore, we examined the occurrence of natural hybridization and discuss the action of reproductive isolation barriers. Nuclear genomic admixture suggests hybridization in sympatric populations, although interspecific gene flow is low among species in all sympatric zones (N(e)m < 0.5). Thus, morphological and genetic divergence (10.99 %) between species can be maintained despite ongoing natural hybridization. Cross-evaluation of our genetic and morphological data suggests that species integrity is maintained by the simultaneous action of multiple barriers, such as divergent reproductive systems among species, differences in floral traits and low hybrid seed viability. (AU)

• FAPESP's process: 09/52725-3 - Speciation, reproductive isolation, and population genetics in species of Bromeliaceae family: implications for taxonomy, evolution and conservation
• Grantee: Clarisse Palma da Silva
• Support Opportunities: BIOTA-FAPESP Program - Young Investigators Grants