Comparative Mitogenomics of True Frogs (Ranidae, Anura), and Its Implications for the Phylogeny and Evolutionary History of Rana
Round 1
Reviewer 1 Report
This study mapped the mitogenome of 2 species in the genus Rana and compared results to 18 other Rana species and 2 outgroups.
They found that Rana showed 2 clades and four gene arrangement patterns. I found the manuscript complete, detailed and understandable.
Minor sentence structure fixes are necessary. For example, the sentence in the abstract "However, the evolutionary history and population genetics in Rana were not well understand, which may be limited by the absence of mitogenome information." could be corrected to However, the evolutionary history of the genus Rana is not well understood and may be limited by the absence of mitogenome information.
I recommend removing the phrase population genetics because I did not see reference to the topic in the main text.
Author Response
Reviewer 1
Comments and Suggestions for Authors
This study mapped the mitogenome of 2 species in the genus Rana and compared results to 18 other Rana species and 2 outgroups. They found that Rana showed 2 clades and four gene arrangement patterns. I found the manuscript complete, detailed and understandable.
>> Thank you for your constructive comments which are very helpful in preparing a revised manuscript. And many thanks for your encouragement.
Minor sentence structure fixes are necessary. For example, the sentence in the abstract "However, the evolutionary history and population genetics in Rana were not well understand, which may be limited by the absence of mitogenome information." could be corrected to However, the evolutionary history of the genus Rana is not well understood and may be limited by the absence of mitogenome information.
>>Revised. See in Line 32.
I recommend removing the phrase population genetics because I did not see reference to the topic in the main text.
>>Revised. See in Line 20 and Line 32.
Reviewer 2 Report
This manuscript reports sequencing of mitochondrial genomes of two frog species with comparative analysis from 18 species of genus Rana. Authors have analyzed different aspects such as mitochondrial genes features, phylogenetic relationships, and gene rearrangement mechanisms. The main findings of this study include the four kinds of gene arrangement patterns and the purify selection of mitochondrial genes in frog species. The mitogenomic analysis is adequate to support the conclusion of this work and overall manuscript is well written. However, I have the following two major concerns to assess the novelty of this work.
- The complete mitochondrial genome of frog Rana zhenhaiensis was already published elsewhere (see et al. Huang et al. 2017; GenBank ID: MN218687.1). However, in this study, it is claimed as newly sequenced mitogenome.
- After checking the given accession IDs from the “Data Availability Statement”, there is no record available in NCBI for any of these accession in both SRA and Genebank databases. The availability of this data is very important to evaluate the quality of mitogenome assemblies and annotations.
Many readers will also be very interested in this data for future work related to mitochondrial phylogenetics.
Minor comments:
- In the Line. 102. “A total of 6.0 Gb raw reads were generated by next-generation sequencing on the 102 Illumina platform”. It is not clear whether how many of raw reads correspond to each species? Further the specific Illumina platform (Miseq, Hiseq or other) used should be informed. Also, the sequence coverage/depth of this generated data should be informed.
- In the Line 133. “The tandem repeats were searched in the CR using the Tandem Repeats Finder program (https://tandem.bu.edu/trf/trf.html)”. This information is missing in the results sections how many and what type of repeats were found?
- It is recommended to change the term “Genomic Rearrangements” (Line. 225) by “Mitogenomic Rearrangements”. Genomic Rearrangements is actually used for whole genome (or chromosomes).
- The Figure 4, 5 and 6 represent and describe the data for the related topic of Genes organizations. It would be better to merge these as Panels (a), (b) and (c) into a single figure.
Author Response
Reviewer 2
Comments and Suggestions for Authors
This manuscript reports sequencing of mitochondrial genomes of two frog species with comparative analysis from 18 species of genus Rana. Authors have analyzed different aspects such as mitochondrial genes features, phylogenetic relationships, and gene rearrangement mechanisms. The main findings of this study include the four kinds of gene arrangement patterns and the purify selection of mitochondrial genes in frog species. The mitogenomic analysis is adequate to support the conclusion of this work and overall manuscript is well written. However, I have the following two major concerns to assess the novelty of this work.
>> Thank you for your constructive comments which are very helpful in preparing a revised manuscript.
- The complete mitochondrial genome of frog Rana zhenhaiensis was already publishedelsewhere (see et al. Huang et al. 2017; GenBank ID: MN218687.1). However, in this study, it is claimed as newly sequenced mitogenome.
>> Thanks a lot. We have revised. Please see Line 77.
- After checking the given accession IDs from the “Data Availability Statement”, there is no record available in NCBI for any of these accession in both SRA and Genebank databases. The availability of this data is very important to evaluate the quality of mitogenome assemblies and annotations. Many readers will also be very interested in this data for future work related to mitochondrial phylogenetics.
>> Thank you for your careful reading. The data have been uploaded in GenBank, and it will be automatically released on December 1, 2022, or when the article is published. The details are shown in the attached file
Minor comments:
- In the Line. 102. “A total of 6.0 Gb raw reads were generated by next-generation sequencing on the 102 Illumina platform”. It is not clear whether how many of raw reads correspond to each species? Further the specific Illumina platform (Miseq, Hiseq or other) used should be informed. Also, the sequence coverage/depth of this generated data should be informed.
>> Revised. See in line 102, 113-114.
- In the Line 133. “The tandem repeats were searched in the CR using the Tandem Repeats Finder program (https://tandem.bu.edu/trf/trf.html)”. This information is missing in the results sections how many and what type of repeats were found?
>> Revised. See in Line 227-231.
- It is recommended to change the term “Genomic Rearrangements” (Line. 225) by “Mitogenomic Rearrangements”. Genomic Rearrangements is actually used for whole genome (or chromosomes).
>> Revised. See in Line 233.
- The Figure 4, 5 and 6 represent and describe the data for the related topic of Genes organizations. It would be better to merge these as Panels (a), (b) and (c) into a single figure.
>> Revised. See in Line 272-285.
Author Response File: Author Response.docx
Reviewer 3 Report
The manuscript entitled “The evolution of mitochondrial genomes in true frogs (Ranidae, Anura) revealed diverse gene arrangement in Rana species” address the mitogenome of two Rana sp. species of China. Although the data obtained is always useful for further studies, the novelty of the work is low, as the main contribution to the science is the data generated and not the conclusions we can extract from the work. However the work is scientifically correct, well written and in my opinion rigorous. I think it could be interesting for a local audience, and as a basis for further evolutionary or ecological works. However, this work would benefit from an expansion, including echological analyses for both species, and relating it with mitogenome results per example. This would allow to reach more conclusions with a wider interest.
For this reason I propose the work for major revisions, recognizing that with piece of additional work it is publishable in Animals.
Author Response
Reviewer 3
Comments and Suggestions for Authors
The manuscript entitled “The evolution of mitochondrial genomes in true frogs (Ranidae, Anura) revealed diverse gene arrangement in Rana species” address the mitogenome of two Rana sp. species of China. Although the data obtained is always useful for further studies, the novelty of the work is low, as the main contribution to the science is the data generated and not the conclusions we can extract from the work. However the work is scientifically correct, well written and in my opinion rigorous. I think it could be interesting for a local audience, and as a basis for further evolutionary or ecological works. However, this work would benefit from an expansion, including echological analyses for both species, and relating it with mitogenome results per example. This would allow to reach more conclusions with a wider interest.
For this reason I propose the work for major revisions, recognizing that with piece of additional work it is publishable in Animals.
>> Thank you for your constructive comments. We read and study the recent mitogenome research papers published in Animals, then revised this manuscript. Two papers were cited in the references. See in Line 65-66.
Round 2
Reviewer 2 Report
I appreciate authors revisions. This revised manuscript is improved and I have one recommendation regarding figures. It is recommended to increase the text size in figure 1 and figure 4. I do not have any further comments.
Author Response
Reviewer 2
I appreciate authors revisions. This revised manuscript is improved and I have one recommendation regarding figures. It is recommended to increase the text size in figure 1 and figure 4. I do not have any further comments.
>> Done. Thank you for your comments.
Reviewer 3 Report
I still think this work needs additional work, with an extensive review of Rana sp. mithogenome. Authors have limited their review to only to references in Annimals and it is not enough. They shoud inclede all knowledge available in all scientific literature. Thus, I can't recommend this work for publication in the present form.
Author Response
Reviewer 3
I still think this work needs additional work, with an extensive review of Rana sp. mitogenome. Authors have limited their review to only to references in Animals and it is not enough. They shoud inclede all knowledge available in all scientific literature. Thus, I can't recommend this work for publication in the present form.
>> Thank you for your advice. We have read, study, and cite the recent mitogenome research in Rana from the journal of Molecular Phylogenetics and Evolution, PLoS ONE, ZooKeys, Asian Herpetological Research, and so on. Then revised this manuscript. This study was only invested effort in generating new genomic resources, which is always a welcome thing to see and crucial to facilitate future research in various fields of Rana research such as phylogenetics, population, conservation, functional genetics etc. And we want to reveal the spatiotemporal diversification of the genus Rana by using three genes (Table 1). But we think that these contents are of little relevance to this study.
>> Thanks again for your constructive comments.
Table 1. GenBank numbers for samples of the genus Rana used.
ID |
Species |
16S |
Cyt b |
ND2 |
1 |
Rana wuyiensis sp. nov. |
MZ337980 |
MZ355497 |
MZ355540 |
2 |
Rana zhengi |
MZ337992 |
MZ355509 |
MZ355552 |
3 |
Rana sangzhiensis |
MZ338002 |
MZ355517 |
MZ355559 |
4 |
Rana jonhsi |
MZ338010 |
MZ355525 |
MZ355566 |
5 |
Rana weiningensis |
MZ338023 |
MZ355538 |
MZ355576 |
6 |
Rana amurensis |
KX269203 |
KX269349 |
KX269418 |
7 |
Rana areolata |
AY779229 |
KX269300 |
KX269369 |
8 |
Rana arvalis |
KX269197 |
KX269344 |
KX269413 |
9 |
Rana asiatica |
KX269200 |
KX269346 |
KX269415 |
10 |
Rana berlandieri |
AY779235 |
KX269301 |
KX269370 |
11 |
Rana boylii |
KX269178 |
KX269299 |
KX269368 |
12 |
Rana cascadae |
KX269176 |
KX269302 |
KX269371 |
13 |
Rana catesbeiana |
KX269208 |
KX269354 |
KX269423 |
14 |
Rana chaochiaoensis |
KX269192 |
KX269339 |
KX269408 |
15 |
Rana chensinensis |
KX269186 |
KX269333 |
KX269402 |
16 |
Rana chiricahuensis |
AY779225 |
KX269303 |
KX269372 |
17 |
Rana clamitans |
AY779204 |
KX269304 |
KX269373 |
18 |
Rana coreana |
KX269202 |
KX269348 |
KX269417 |
19 |
Rana culaiensis |
KX269190 |
KX269337 |
KX269406 |
20 |
Rana dunni |
AY779222 |
KX269305 |
KX269374 |
21 |
Rana dybowski |
KX269188 |
KX269335 |
KX269404 |
22 |
Rana forreri |
AY779233 |
GU184219 |
GU184250 |
23 |
Rana graeca |
KX269199 |
KX269345 |
KX269414 |
24 |
Rana hanluica |
KX269191 |
KX269338 |
KX269407 |
25 |
Rana huanrensis |
KX269183 |
KX269330 |
KX269400 |
26 |
Rana iberica |
KX269195 |
KX269342 |
KX269411 |
27 |
Rana japonica |
KX269220 |
KX269364 |
KX269434 |
28 |
Rana kukunoris |
KX269185 |
KX269332 |
KX269401 |
29 |
Rana kunyuensis |
KX269201 |
KX269347 |
KX269416 |
30 |
Rana longicrus |
KX269189 |
KX269336 |
KX269405 |
31 |
Rana luteiventris |
KX269213 |
KX269358 |
KX269428 |
32 |
Rana macrocnemis |
KX269194 |
KX269341 |
KX269410 |
33 |
Rana macroglossa |
AY779243 |
KX269306 |
KX269376 |
34 |
Rana maculata |
AY779207 |
KX269307 |
KX269377 |
35 |
Rana magnaocularis |
AY779239 |
KX269308 |
KX269378 |
36 |
Rana montezumae |
AY779223 |
KX269309 |
KX269379 |
37 |
Rana neovolcanica |
AY779236 |
KX269310 |
KX269380 |
38 |
Rana omeimontis |
KX269193 |
KX269340 |
KX269409 |
39 |
Rana omiltemana |
AY779238 |
KX269311 |
KX269381 |
40 |
Rana ornativentris |
KX269187 |
KX269334 |
KX269403 |
41 |
Rana palustris |
KX269207 |
KX269353 |
KX269422 |
42 |
Rana psilonota |
AY779217 |
KX269312 |
KX269382 |
43 |
Rana pustulosa |
AY779220 |
KX269313 |
KX269383 |
44 |
Rana sakuraii |
KX269205 |
KX269351 |
KX269420 |
45 |
Rana sauteri |
KX269204 |
KX269350 |
KX269419 |
46 |
Rana septentrionalis |
KX269179 |
KX269314 |
KX269384 |
47 |
Rana shuchinae |
KX269210 |
KX269356 |
KX269425 |
48 |
Rana sierrae |
KX269211 |
KX269357 |
KX269426 |
49 |
Rana sierramadrensis |
AY779216 |
KX269315 |
KX269385 |
50 |
Rana spectabilis |
AY779227 |
KX269320 |
KX269390 |
51 |
Rana sphenocephala |
AY779251 |
KX269321 |
KX269391 |
…… |
|
|
|
|
…… |
|
|
|
|
Round 3
Reviewer 3 Report
Although I disagree with the authors (the contextualization of Rana sp. mithogenome is necessary in order to provide clear conclusions and not only data), I appreciate the effort to review additional references.
Author Response
>> Thank you for your encouragement and constructive comments. We have learned a lot from your advice, which will be of great benefit in our future study. And we have modified the grammar a in the manuscript to make the article more readable. Thanks again.