Comment on Schielzeth et al. (2014): “Genome size variation affects song attractiveness in grasshoppers: Evidence for sexual selection against large genomes”

Camacho, Juan Pedro M.

doi:10.1111/evo.12869

Cited by 3 publications

(3 citation statements)

References 17 publications

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“…). Camacho () commented on our publication expressing doubts whether the data support our conclusions. We appreciate his critical and thoughtful reading of our article and the interest in the topic that his comment reveals.…”

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confidence: 65%

Technical Comment: Response to Camacho

et al. 2016

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confidence: 65%

Technical Comment: Response to Camacho

et al. 2016

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“…biguttulus as 1C = 10.99 pg, which is in line with the measurements of Shah et al (9) (1C = 9.31 pg) and Husemann et al (8) (1C = 11.31 pg). This suggests that, as commented by Camacho (34), the measurement of Schielzeth et al (33) was indeed unreliable and does not represent a true value.…”

Section: Discussionmentioning

confidence: 93%

New estimates of genome size in Orthoptera and their evolutionary implications

Hawlitschek

Sadílek

Dey

et al. 2022

Preprint

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Animal genomes vary widely in size, and much of their architecture and content remains poorly understood. Even among related groups, such as orders of insects, genomes may vary in size by orders of magnitude – for reasons unknown. The largest known insect genomes were repeatedly found in Orthoptera, e.g., Podisma pedestris (1C = 16.93 pg), Stethophyma grossum (1C = 18.48 pg) and Bryodemella holdereri (1C = 18.64 pg). While all these species belong to the suborder of Caelifera, the ensiferan Deracantha onos (1C = 19.60 pg) was recently found to have the largest genome. Here, we present new genome size estimates of 50 further species of Ensifera (superfamilies Gryllidea, Tettigoniidea) and Caelifera (Acrididae, Tetrigidae) based on flow cytometric measurements. We found that Bryodemella tuberculata (Caelifera: Acrididae) has the so far largest measured genome of all insects with 1C = 21.96 pg (21.48 gBp). Species with 2n = 16 and 2n = 22 chromosomes have significantly larger genomes than species with other chromosome counts. Gryllidea genomes vary between 1C = 0.95 and 2.88 pg, and Tetrigidae between 1C = 2.18 and 2.41, while the genomes of all other studied Orthoptera range in size from 1C = 1.37 to 21.96 pg. Reconstructing ancestral genome sizes based on a phylogenetic tree of mitochondrial genomic data, we found genome size values of >15.84 pg only for the nodes of Bryodemella holdereri/B. tuberculata and Chrysochraon dispar/Euthystira brachyptera. The predicted values of ancestral genome sizes are 6.19 pg for Orthoptera, 5.37 pg for Ensifera, and 7.28 pg for Caelifera. The reasons for the large genomes in Orthoptera remain largely unknown, but a duplication seems unlikely as chromosome numbers do not differ. Sequence-based genomic studies may shed light on the underlying evolutionary mechanisms.

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“…(1C = 11.31 pg). This suggests that, as commented by Camacho [34], the measurement of Schielzeth et al [33] was indeed unreliable and does not represent a true value. Within Acrididae, the largest genomes belong to representatives of the subfamilies Oedipodinae (maximum: Bryodemella tuberculata, 2n = 22+XX, 1C = 21.96 pg), Gomphocerinae (Chrysochraon dispar, 2n = 16+XX, 1C = 19.43 pg), and Melanoplinae (Podisma pedestris, 2n = 22+X0, 1C = 16.93 pg).…”

Section: Plos Onementioning

confidence: 95%

New estimates of genome size in Orthoptera and their evolutionary implications

et al. 2023

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Animal genomes vary widely in size, and much of their architecture and content remains poorly understood. Even among related groups, such as orders of insects, genomes may vary in size by orders of magnitude–for reasons unknown. The largest known insect genomes were repeatedly found in Orthoptera, e.g., Podisma pedestris (1C = 16.93 pg), Stethophyma grossum (1C = 18.48 pg) and Bryodemella holdereri (1C = 18.64 pg). While all these species belong to the suborder of Caelifera, the ensiferan Deracantha onos (1C = 19.60 pg) was recently found to have the largest genome. Here, we present new genome size estimates of 50 further species of Ensifera (superfamilies Gryllidea, Tettigoniidea) and Caelifera (Acrididae, Tetrigidae) based on flow cytometric measurements. We found that Bryodemella tuberculata (Caelifera: Acrididae) has the so far largest measured genome of all insects with 1C = 21.96 pg (21.48 gBp). Species of Orthoptera with 2n = 16 and 2n = 22 chromosomes have significantly larger genomes than species with other chromosome counts. Gryllidea genomes vary between 1C = 0.95 and 2.88 pg, and Tetrigidae between 1C = 2.18 and 2.41, while the genomes of all other studied Orthoptera range in size from 1C = 1.37 to 21.96 pg. Reconstructing ancestral genome sizes based on a phylogenetic tree of mitochondrial genomic data, we found genome size values of >15.84 pg only for the nodes of Bryodemella holdereri / B. tuberculata and Chrysochraon dispar / Euthystira brachyptera. The predicted values of ancestral genome sizes are 6.19 pg for Orthoptera, 5.37 pg for Ensifera, and 7.28 pg for Caelifera. The reasons for the large genomes in Orthoptera remain largely unknown, but a duplication or polyploidization seems unlikely as chromosome numbers do not differ much. Sequence-based genomic studies may shed light on the underlying evolutionary mechanisms.

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Comment on Schielzeth et al. (2014): “Genome size variation affects song attractiveness in grasshoppers: Evidence for sexual selection against large genomes”

Cited by 3 publications

References 17 publications

Technical Comment: Response to Camacho

Technical Comment: Response to Camacho

New estimates of genome size in Orthoptera and their evolutionary implications

New estimates of genome size in Orthoptera and their evolutionary implications

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