Abstract:
:We present a phylogenetic analysis and comparison of structural features of chloroplast genomes for 39 species of the eucalypt group (genera Eucalyptus, Corymbia, Angophora, and outgroups Allosyncarpia and Stockwellia). We use 41 complete chloroplast genome sequences, adding 39 finished-quality chloroplast genomes to two previously published genomes. Maximum parsimony and Bayesian analyses, based on >7000 variable nucleotide positions, produced one fully resolved phylogenetic tree (35 supported nodes, 27 with 100% bootstrap support). Eucalyptus and its sister lineage Angophora+Corymbia show a deep divergence. Within Eucalyptus, three lineages are resolved: the 'eudesmid', 'symphyomyrt' and 'monocalypt' groups. Corymbia is paraphyletic with respect to Angophora. Gene content and order do not vary among eucalypt chloroplasts; length mutations, especially frame shifts, are uncommon in protein-coding genes. Some non-synonymous mutations are highly incongruent with the overall phylogenetic signal, notably in rbcL, and may be adaptive. Application of custom informatics pipelines (GYDLE Inc.) enabled direct chloroplast genome assembly, resolving each genome to finished-quality with no need for PCR gap-filling or contig order resolution. Analysis of whole chloroplast genomes resolved major eucalypt clades and revealed variable regions of the genome that will be useful in lower-level genetic studies (including phylogeography and geneflow).
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Bayly MJ,Rigault P,Spokevicius A,Ladiges PY,Ades PK,Anderson C,Bossinger G,Merchant A,Udovicic F,Woodrow IE,Tibbits Jdoi
10.1016/j.ympev.2013.07.006subject
Has Abstractpub_date
2013-12-01 00:00:00pages
704-16issue
3eissn
1055-7903issn
1095-9513pii
S1055-7903(13)00283-2journal_volume
69pub_type
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