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Characterization of active transposable elements and their new insertions in tuber propagated greater yam (Dioscorea alata).
Panhwar, Sajjad Ali; Wang, Dandan; Lin, Fanhui; Wang, Ying; Liu, Mengli; Chen, Runan; Huang, Yonglan; Wu, Wenqiang; Huang, Dongyi; Xiao, Yong; Xia, Wei.
Afiliación
  • Panhwar SA; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China.
  • Wang D; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China.
  • Lin F; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China.
  • Wang Y; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China.
  • Liu M; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China.
  • Chen R; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China.
  • Huang Y; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China.
  • Wu W; School of life sciences, Hainan University, 570228, Haikou, P.R. China.
  • Huang D; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China. hdongyi@hainanu.edu.cn.
  • Xiao Y; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China. xiaoyong@hainanu.edu.cn.
  • Xia W; School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), School of Tropical Agriculture and Forestry, Hainan University, 570228, Haikou, P.R. China. saizjxiawei@hainanu.edu.cn.
BMC Genomics ; 25(1): 864, 2024 Sep 16.
Article en En | MEDLINE | ID: mdl-39285286
ABSTRACT

BACKGROUND:

Greater yam is a key staple crop grown in tropical and subtropical regions, while its asexual propagation mode had led to non-flowering mutations. How transposable elements contribute to its genetic variations is rarely analyzed. We used transcriptome and whole genome sequencing data to identify active transposable elements (TEs) and genetic variation caused by these active TEs. Our aim was to shed light on which TEs would lead to its intraspecies variation.

RESULTS:

Annotation of de novo assembly transcripts indicated that 0.8 - 0.9% of transcripts were TE related, with LTR retrotransposons (LTR-RTs) accounted for 65% TE transcripts. A large portion of these transcripts were non-autonomous TEs, which had incomplete functional domains. The majority of mapped transcripts were distributed in genic deficient regions, with 9% of TEs overlapping with genic regions. Moreover, over 90% TE transcripts exhibited low expression levels and insufficient reads coverage to support full-length structure assembly. Subfamily analysis of Copia and Gypsy, the two LTR-RTs revealed that a small number of subfamilies contained a significantly larger number of members, which play a key role in generating TE transcript. Based on resequencing data, 15,002 L-RT insertion loci were detected for active LTR-RT members. The insertion loci of LTR-RTs were highly divergent among greater yam accessions.

CONCLUSIONS:

This study showed the ongoing transcription and transpositions of TEs in greater yam, despite low transcription levels and incomplete proteins insufficient for autonomous transposition. While our research did not directly link these TEs to specific yam traits such as tuber yield and propagation mode, it lays a crucial foundation for further research on how these TE insertion polymorphisms (TIPs) might be related to variations in greater yam traits and its tuber propagation mode. Future research may explore the potential roles of TEs in trait variations, such as tuber yield and stress resistance, in greater yam.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Elementos Transponibles de ADN / Dioscorea Idioma: En Revista: BMC Genomics Asunto de la revista: GENETICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Elementos Transponibles de ADN / Dioscorea Idioma: En Revista: BMC Genomics Asunto de la revista: GENETICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido