Intra-individual heteroplasmy in the Gentiana tongolensis plastid genome (Gentianaceae).

Abstract:

:Chloroplasts are typically inherited from the female parent and are haploid in most angiosperms, but rare intra-individual heteroplasmy in plastid genomes has been reported in plants. Here, we report an example of plastome heteroplasmy and its characteristics in Gentiana tongolensis (Gentianaceae). The plastid genome of G. tongolensis is 145,757 bp in size and is missing parts of petD gene when compared with other Gentiana species. A total of 112 single nucleotide polymorphisms (SNPs) and 31 indels with frequencies of more than 2% were detected in the plastid genome, and most were located in protein coding regions. Most sites with SNP frequencies of more than 10% were located in six genes in the LSC region. After verification via cloning and Sanger sequencing at three loci, heteroplasmy was identified in different individuals. The cause of heteroplasmy at the nucleotide level in plastome of G. tongolensis is unclear from the present data, although biparental plastid inheritance and transfer of plastid DNA seem to be most likely. This study implies that botanists should reconsider the heredity and evolution of chloroplasts and be cautious with using chloroplasts as genetic markers, especially in Gentiana.

journal_name

PeerJ

journal_title

PeerJ

authors

Sun SS,Zhou XJ,Li ZZ,Song HY,Long ZC,Fu PC

doi

10.7717/peerj.8025

subject

Has Abstract

pub_date

2019-11-27 00:00:00

pages

e8025

issn

2167-8359

pii

8025

journal_volume

7

pub_type

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