Hybridization and polyploidization effects on LTR-retrotransposon activation in potato genome

Gantuz, Magdalena; Morales, Andrés; Bertoldi, María Victoria; Ibañez, Verónica Noé; Duarte, Paola Fernanda; Marfil, Carlos Federico; Masuelli, Ricardo Williams

doi:10.1007/s10265-021-01354-9

Cited by 12 publications

(8 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hybridization and polyploidization can widely activate transposable elements that are silenced by epigenetic modifications [ 83 , 97 ]. Most gametophytic apomicts are polyploid, and a causal relationship has been proposed between apomixis and polyploidization [ 6 ].…”

Section: Genetic Events Lead To Apomixis: Polyploidization and Hybrid...mentioning

confidence: 99%

Apomixis: genetic basis and controlling genes

Jia

Tan

et al. 2022

Horticulture Research

View full text Add to dashboard Cite

Apomixis is the phenomenon of clonal reproduction by seed. As apomixis can produce clonal progeny with exactly the same genotype to the maternal plant, it has important application value in genotype fixation and accelerating agricultural breeding strategies. Introduction of apomixis to major crops would bring many benefits to agriculture, including permanent fixation of superior genotypes, simplifying the procedures of hybrid seed production, as well as purification and rejuvenation of crops propagated vegetatively. Although apomixis naturally occurs in more than 400 plant species, it is rare among the major crops. Currently, with a better understanding of apomixis, some achievements have been made on synthetic apomixis. However, due to prevailing limitations, there is still a long way to large-scale application of apomixis for crop breeding. Here, we compare the developmental features of apomixis and sexual plant reproduction and review the recent identification of apomixis genes, transposons, epigenetic regulation and genetic events leading to apomixis. We also summarize the possible strategies and potential genes for engineering apomixis into crop plants.

show abstract

Section: Genetic Events Lead To Apomixis: Polyploidization and Hybrid...mentioning

confidence: 99%

Apomixis: genetic basis and controlling genes

Jia

Tan

et al. 2022

Horticulture Research

View full text Add to dashboard Cite

show abstract

“…(2010) identified Ty1-copia transposition in durum wheat under salt and light stress. The effect of interspecific hybridization and polyploidization on the actively transposing LTR-RT using S-SAP was evaluated by Gantuz et al. (2022) .…”

Section: Identification Of Novel Insertion Sites Produced By Actively...mentioning

confidence: 99%

A review of strategies used to identify transposition events in plant genomes

et al. 2022

View full text Add to dashboard Cite

Transposable elements (TEs) were initially considered redundant and dubbed ‘junk DNA’. However, more recently they were recognized as an essential element of genome plasticity. In nature, they frequently become active upon exposition of the host to stress conditions. Even though most transposition events are neutral or even deleterious, occasionally they may happen to be beneficial, resulting in genetic novelty providing better fitness to the host. Hence, TE mobilization may promote adaptability and, in the long run, act as a significant evolutionary force. There are many examples of TE insertions resulting in increased tolerance to stresses or in novel features of crops which are appealing to the consumer. Possibly, TE-driven de novo variability could be utilized for crop improvement. However, in order to systematically study the mechanisms of TE/host interactions, it is necessary to have suitable tools to globally monitor any ongoing TE mobilization. With the development of novel potent technologies, new high-throughput strategies for studying TE dynamics are emerging. Here, we present currently available methods applied to monitor the activity of TEs in plants. We divide them on the basis of their operational principles, the position of target molecules in the process of transposition and their ability to capture real cases of actively transposing elements. Their possible theoretical and practical drawbacks are also discussed. Finally, conceivable strategies and combinations of methods resulting in an improved performance are proposed.

show abstract

“…Along with polyploidization, ampli cation of transposable elements (TEs) is a primary form of mutation affecting structure, function, and evolution of chromosomes [14][15][16][17][18]. Long terminal repeat retrotransposons (LTR-RTs) are major components of TEs in plant genomes, accounting for > 70% of the nuclear genomes of maize [19], tea [20], and rye [21].…”

Section: Introductionmentioning

confidence: 99%

Karyotype and LTR-RTs analysis provide insights into oak genomic evolution

CAO,

CHEN,

LIAO

et al. 2024

Preprint

View full text Add to dashboard Cite

Background: Whole-genome duplication and long terminal repeat retrotransposons (LTR-RTs) amplification in organisms are essential factors that affect speciation, local adaptation, and diversification of organisms. Understanding the karyotype projection and LTR-RTs amplification could contribute to untangling evolutionary history. This study compared the karyotype and LTR-RTs evolution in the genomes of eight oaks, a dominant lineage in Northern Hemisphere forests. Results: Karyotype projections showed that chromosomal evolution was relatively conservative in oaks, especially on chromosomes 1 and 7. Modern oak chromosomes formed through multiple fusions, fissions, and rearrangements after an ancestral triplication event. Species-specific chromosomal rearrangements revealed fragments preserved through natural selection and adaptive evolution. A total of 441,449 full-length LTR-RTs were identified from eight oak genomes, and the number of LTR-RTs for oaks from section Cyclobalanopsis was larger than in other sections. Recent amplification of the species-specific LTR-RTs lineages resulted in significant variation in the abundance and composition of LTR-RTs among oaks. The LTR-RTs insertion suppresses gene expression, and the suppressed intensity in gene regions was larger than in promoter regions. Some centromere and rearrangement regions indicated high-density peaks of LTR/Copia and LTR/Gypsy. Different centromeric regional repeat units (32, 78, 79 bp) were detected on different Q. glauca chromosomes. Conclusion: Chromosome fusions and arm exchanges contribute to the formation of oak karyotypes. The composition and abundance of LTR-RTs are affected by its recent amplification. LTR-RTs random retrotransposition suppresses gene expression and is enriched in centromere and chromosomal rearrangement regions. This study provides novel insights into the evolutionary history of oak karyotypes and the organization, amplification, and function of LTR-RTs.

show abstract

Hybridization and polyploidization effects on LTR-retrotransposon activation in potato genome

Cited by 12 publications

References 60 publications

Apomixis: genetic basis and controlling genes

Apomixis: genetic basis and controlling genes

A review of strategies used to identify transposition events in plant genomes

Karyotype and LTR-RTs analysis provide insights into oak genomic evolution

Contact Info

Product

Resources

About