JSU Student Symposium 2022

Molecular Evidence of Cryptic Hybridization in the Japanese Nezasa Bamboos (Pleioblastus section Nezasa)

Title

Molecular Evidence of Cryptic Hybridization in the Japanese Nezasa Bamboos (Pleioblastus section Nezasa)

Date

2-15-2022

Faculty Mentor

Jimmy Triplett, Biology

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Submission Type

Demonstration

Location

9:45-9:55am | Houston Cole Library, 11th Floor

Description

The genus Pleioblastus is a complex group of Southeast Asian temperate bamboos with 7-21 species, depending on the taxonomic authority. We hypothesize that the taxonomic complexity of the group is due to previously undetected occurrences of hybridization and subsequent backcrossing between filial and parental lineages, creating one or more cryptic hybrids. This is supported by recent research on the temperate bamboos that revealed intergeneric hybrids (between species in different genera). This poses the question of where to draw the distinction between species’ designations within Pleioblastus. The objective of the current study is to test the hypothesis that Pleioblastus section Nezasa is a mix of parental and hybrid lineages using data from AFLP markers and a combination of tree-building (PAUP) and genotypic assignment analyses (STRUCTURE, NEWHYBRIDS). This is critical to understanding the taxonomy of this group and may have implications in conservation due to hybridization-induced extinction. The current data support the hypothesis that hybridization has had an important role in the evolution of Pleioblastus section Nezasa, and highlight two major lineages (Nezasa I and Nezasa II) and hybrids between these lineages. We will discuss the implications of this research for our understanding of plant evolution and species nomenclature.

Keywords

student research, biology

Rights

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Disciplines

Biology

Molecular Evidence of Cryptic Hybridization in the Japanese Nezasa Bamboos (Pleioblastus section Nezasa)

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