Evolutionary dynamics of <scp>R</scp>2 retroelement and insertion inheritance in the genome of bisexual and parthenogenetic <i><scp>B</scp>acillus rossius</i> populations (<scp>I</scp>nsecta <scp>P</scp>hasmida)

Bonandin, Livia; Scavariello, Claudia; Luchetti, Andrea; Mantovani, Barbara

doi:10.1111/imb.12126

Cited by 6 publications

(36 citation statements)

References 44 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to check for possible differences between obligatory and facultative parthenogenesis, present data on B. a. atticus offspring were compared with the unisexual offspring of B. rossius analyzed in Bonandin et al . (). Obligatory unisexual offspring has significantly lower values for S o tot and ñ ( t one‐tailed = 2.21, P = 0.029 and t one‐tailed = 3.40, P = 0.0046, respectively) and showed a decidedly different insertion frequencies distribution than that of the facultative unisexual progeny ( D KS = 0.49, P = 0.0009; Fig.…”

Section: Resultsmentioning

confidence: 97%

“…R2 insertion frequency spectra of the obligatory parthenogenetic B. a. atticus offspring in comparison with the facultative unisexual offspring of B. r. redtenbacheri analyzed in Bonandin et al . (). Each bin represents a class of insertion frequency.…”

Section: Resultsmentioning

confidence: 97%

“…To test the impact of reproductive strategies on R2 accumulation in host genomes, we analyzed its activity in individuals from two populations of the obligatory parthenogenetic B. a. atticus subspecies and from the population of the strictly gonochoric B. g. maretimi subspecies. These data add and complete previous analyses on the facultative parthenogenetic B. rossius (Bonandin et al ., )…”

Section: Discussionmentioning

confidence: 99%

“…Present results on B. g. maretimi and B. a. atticus field‐collected specimens have been compared with insertion analyses data on B. rossius rossius from Anzio (Rome; bisexual population), B. rossius redtenbacheri from Patti (near Messina in northeastern Sicily; bisexual population), and Curcuraci (Messina; parthenogenetic population) derived from Mingazzini (), while offspring results have been compared with data on the element activity in the offspring of parthenogenetic B. r. redtenbacheri individuals and of crosses involving as parental females either parthenogenetic specimens or B. r. rossius gonochoric individuals derived from Bonandin et al . ().…”

Section: Methodsmentioning

confidence: 97%

“…As far as R2 is concerned, we showed that the B. rossius genome hosts a functional (R2Br fun ) and a closely related, degenerate (R2Br deg ) element (Bonandin et al ., ). Both elements actively replicate, but while R2Br fun showed a canonical pattern of a functional R2, R2Br deg copies are exclusively full length, that is, they have no associated 5′‐end deletions, and lost the ability to fold into the ribozyme necessary for R2 RNA maturation, suggesting they replicate via 28S rDNA unequal recombination (Martoni et al ., ).…”

Section: Introductionmentioning

confidence: 97%

See 4 more Smart Citations

Obligatory parthenogenesis and TE load: Bacillus stick insects and the R2 non‐LTR retrotransposon

et al. 2016

View full text Add to dashboard Cite

Transposable elements (TEs) are selfish genetic elements whose self-replication is contrasted by the host genome. In this context, host reproductive strategies are predicted to impact on both TEs load and activity. The presence and insertion distribution of the non-LTR retrotransposon R2 was here studied in populations of the strictly bisexual Bacillus grandii maretimi and of the obligatory parthenogenetic Bacillus atticus atticus. Furthermore, data were also obtained from the offspring of selected B. a. atticus females. At the population level, the gonochoric B. g. maretimi showed a significantly higher R2 load than the obligatory parthenogenetic B. a. atticus. The comparison with bisexual and unisexual Bacillus rossius populations showed that their values were higher than those recorded for B. a. atticus and similar, or even higher, than those of B. g. maretimi. Consistently, an R2 load reduction is scored in B. a. atticus offspring even if with a great variance. On the whole, data here produced indicate that in the obligatory unisexual B. a. atticus R2 is active and that mechanisms of molecular turnover are effective. Furthermore, progeny analyses show that, at variance of the facultative parthenogenetic B. rossius, the R2 activity is held at a lower rate. Modeling parental-offspring inheritance, suggests that in B. a. atticus recombination plays a major role in eliminating insertions rather than selection, as previously suggested for unisexual B. rossius progeny, even if in both cases a high variance is observed. In addition to this, mechanisms of R2 silencing or chances of clonal selection cannot be ruled out.

show abstract

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Obligatory parthenogenesis and TE load: Bacillus stick insects and the R2 non‐LTR retrotransposon

et al. 2016

View full text Add to dashboard Cite

show abstract

The puzzling taxonomic rank of Pijnackeria hispanica, a chimerical hybrid androgen (Insecta, Phasmida)

et al. 2020

View full text Add to dashboard Cite

The stick-insect genus Pijnackeria includes four diploid bisexual and two polyploid (3n, 38 4n) parthenogenetic species. Earlier analyses of the tetraploid parthenogen P. hispanica 39 using mitochondrial markers allowed to trace its maternal ancestry to Pijnackeria 40 originis, while no maternal nuclear contribution was found, thus suggesting an 41 androgenetic and hybrid origin. The recently described Pijnackeria recondita-42showing, among other features, a specific antennal structure linking it to the tetraploid 43 parthenogen-prompted us to check whether the new species could be P. hispanica 44 unknown paternal ancestor. In this work we use karyology and of molecular analysis of 45 the mitochondrial gene cytochrome c oxidase subunit 2 (cox2), and the nuclear gene 46 elongation factor 1 subunit α (ef1-α) to investigate the origin of such a complex 47 tetraploid hybrid parthenogen. 48The molecular analysis supported P. recondita as being a paternal ancestor of the P. 49 hispanica, but also suggested that two more fathering species have to be taken into 50 account: P. barbarae and the unknown paternal ancestor of the triploid hybrid P. 51 masettii. Therefore, P. hispanica is apparently a polyphyletic chimeric androgen, which 52 we propose to indicate as an androgenetic complex. Our data also revealed that P. 53 hispanica is between 1.96 Myr and 3.31 Myr old, making it the oldest parthenogenetic 54 taxon discovered among insects.

show abstract

Comparative genomics of tadpole shrimps (Crustacea, Branchiopoda, Notostraca): Dynamic genome evolution against the backdrop of morphological stasis

et al. 2021

View full text Add to dashboard Cite

Evolutionary dynamics of R2 retroelement and insertion inheritance in the genome of bisexual and parthenogenetic Bacillus rossius populations (Insecta Phasmida)

Cited by 6 publications

References 44 publications

Obligatory parthenogenesis and TE load: Bacillus stick insects and the R2 non‐LTR retrotransposon

Obligatory parthenogenesis and TE load: Bacillus stick insects and the R2 non‐LTR retrotransposon

The puzzling taxonomic rank of Pijnackeria hispanica, a chimerical hybrid androgen (Insecta, Phasmida)

Comparative genomics of tadpole shrimps (Crustacea, Branchiopoda, Notostraca): Dynamic genome evolution against the backdrop of morphological stasis

Contact Info

Product

Resources

About