首页|Expansions and contractions of the inverted repeat,as well as gene loss and potential pseudogenization shape plastome evolution in Hechtioideae(Bromeliaceae,Poales)

Expansions and contractions of the inverted repeat,as well as gene loss and potential pseudogenization shape plastome evolution in Hechtioideae(Bromeliaceae,Poales)

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Full plastomes have recently proven to be a valuable data source for resolving recalcitrant phylogenetic relationships in the flowering plant family Bromeliaceae.The study of complete plastomes has additionally led to the discovery of new structural rearrangements and advanced our understanding of bromeliad plastome diversity and evolution.Here,we focus on the study of full plastomes of the bromeliad subfamily Hechtioideae to assess phylogenetic relationships,marker informativeness,and plastome structure and evolution.Using whole-genome sequencing data,we de novo assembled and annotated new plastid genomes of 19 Hechtioideae species plus one representative each from the Pitcairnioideae and Puyoideae subfamilies and compared them with four additional available plastomes from other bromeliad subfamilies.Our phylogenetic analysis using complete plastome sequences not only recovered the three currently recognized genera of Hechtioideae as monophyletic,strongly supporting Mesoamerantha as sister of Bakerantha and Hechtia,but also improved statistical support at different phylogenetic depths within the subfamily.We identified a set of highly informative loci,some of them explored for the first time in Hechtioideae.Structural rearrangements,including expansions and contractions of the inverted repeats,large inversions,and gene loss and potential pseudogenization were detected mainly within the genus Hechtia.Evolutionary trait rate shifts were associated with the size and guanine-cytosine content of the small single copy and inverted repeats.

BromeliaceaeHechtioideaendh gene familyphylogenetic informativenessphylogenomicsplastid genomestructural rearrangements

Ivón M.Ramírez-Morillo、Laura A.Espinosa-Barrera、Carolina Granados Mendoza、Sandra I.Vera-Paz、Daniel D.Díaz Contreras Díaz、Katya J.Romero-Soler

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Unidad de Recursos Naturales,Centro de Investigación Científica de Yucatán A.C.,Mérida 97205,Yucatán,Mexico

Laboratorio de Agrobiotecnología,Tecnoparque CLQ,Universidad de Colima,Colima 28629,Mexico

Departamento de Botánica,Instituto de Biología,Universidad Nacional Autónoma de México,Coyoacán,Mexico City 04510,Mexico

Posgrado en Ciencias Biológicas,Universidad Nacional Autónoma de México,Coyoacán,Mexico City 04510,Mexico

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the"Consejo Nacional de Ciencia y Tecnología"(CONACYT)projectsthe"Consejo Nacional de Ciencia y Tecnología"(CONACYT)projectsUNAM-DGAPA-PAPIIT projectInvestigación Científica Básica,Consejo Nacional de Ciencia y Tecnología(CONACYT)CONACYT for fellowshipDirección General de Asuntos del Personal Académico(DGAPA-UNAM,)(2022-2023)master scholarship from CONACYTmaster scholarship from CONACYTmaster scholarship from CONACYT

183281283357IA202319286249391947750269756019respectively

2024

10.1111/jse.13004

植物分类学报
中国科学院植物研究所　中国植物学会

植物分类学报

CSTPCD
影响因子：0.322
ISSN：1674-4918
年,卷(期)：2024.62(3)
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