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Hybrid zone analysis confirms cryptic species of banded newt and does not support competitive displacement since secondary contact.

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Title: Hybrid zone analysis confirms cryptic species of banded newt and does not support competitive displacement since secondary contact.
Authors: Kalaentzis, Konstantinos1,2,3 (AUTHOR) konstakal95@gmail.com, Arntzen, Jan W.1,2 (AUTHOR), Avcı, Aziz4 (AUTHOR), van den Berg, Victor1,2 (AUTHOR), Beukema, Wouter5 (AUTHOR), France, James1,2 (AUTHOR), Olgun, Kurtuluş4 (AUTHOR), van Riemsdijk, Isolde1,2,6 (AUTHOR), Üzüm, Nazan4 (AUTHOR), de Visser, Manon C.1,2 (AUTHOR), Wielstra, Ben1,2 (AUTHOR)
Source: Ecology & Evolution (20457758). Sep2023, Vol. 13 Issue 9, p1-10. 10p.
Subject Terms: Hybrid zones, Mitochondrial DNA, Newts, Nuclear DNA, Gene flow, Genetic markers
Geographic Terms: Türkiye
Abstract: When two putatively cryptic species meet in nature, hybrid zone analysis can be used to estimate the extent of gene flow between them. Two recently recognized cryptic species of banded newt (genus Ommatotriton) are suspected to meet in parapatry in Anatolia, but a formal hybrid zone analysis has never been conducted. We sample populations throughout the range, with a focus on the supposed contact zone, and genotype them for 31 nuclear DNA SNP markers and mtDNA. We determine the degree of genetic admixture, introgression, and niche overlap. We reveal an extremely narrow hybrid zone, suggesting strong selection against hybrids, in line with species status. The hybrid zone does not appear to be positioned at an ecological barrier, and there is significant niche overlap. Therefore, the hybrid zone is best classified as a tension zone, maintained by intrinsic selection against hybrids. While the two banded newt species can evidently backcross, we see negligible introgression and the pattern is symmetric, which we interpret as supporting the fact that the hybrid zone has been practically stationary since its origin (while extensive hybrid zone movement has been suggested in other newt genera in the region). Our study illustrates the use of hybrid zone analysis to test cryptic species status. [ABSTRACT FROM AUTHOR]
Copyright of Ecology & Evolution (20457758) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Hybrid zone analysis confirms cryptic species of banded newt and does not support competitive displacement since secondary contact.
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  Data: <searchLink fieldCode="AR" term="%22Kalaentzis%2C+Konstantinos%22">Kalaentzis, Konstantinos</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> konstakal95@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Arntzen%2C+Jan+W%2E%22">Arntzen, Jan W.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Avcı%2C+Aziz%22">Avcı, Aziz</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22van+den+Berg%2C+Victor%22">van den Berg, Victor</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Beukema%2C+Wouter%22">Beukema, Wouter</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22France%2C+James%22">France, James</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Olgun%2C+Kurtuluş%22">Olgun, Kurtuluş</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22van+Riemsdijk%2C+Isolde%22">van Riemsdijk, Isolde</searchLink><relatesTo>1,2,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Üzüm%2C+Nazan%22">Üzüm, Nazan</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22de+Visser%2C+Manon+C%2E%22">de Visser, Manon C.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wielstra%2C+Ben%22">Wielstra, Ben</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Ecology+%26+Evolution+%2820457758%29%22">Ecology & Evolution (20457758)</searchLink>. Sep2023, Vol. 13 Issue 9, p1-10. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Hybrid+zones%22">Hybrid zones</searchLink><br /><searchLink fieldCode="DE" term="%22Mitochondrial+DNA%22">Mitochondrial DNA</searchLink><br /><searchLink fieldCode="DE" term="%22Newts%22">Newts</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+DNA%22">Nuclear DNA</searchLink><br /><searchLink fieldCode="DE" term="%22Gene+flow%22">Gene flow</searchLink><br /><searchLink fieldCode="DE" term="%22Genetic+markers%22">Genetic markers</searchLink>
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– Name: Abstract
  Label: Abstract
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  Data: When two putatively cryptic species meet in nature, hybrid zone analysis can be used to estimate the extent of gene flow between them. Two recently recognized cryptic species of banded newt (genus Ommatotriton) are suspected to meet in parapatry in Anatolia, but a formal hybrid zone analysis has never been conducted. We sample populations throughout the range, with a focus on the supposed contact zone, and genotype them for 31 nuclear DNA SNP markers and mtDNA. We determine the degree of genetic admixture, introgression, and niche overlap. We reveal an extremely narrow hybrid zone, suggesting strong selection against hybrids, in line with species status. The hybrid zone does not appear to be positioned at an ecological barrier, and there is significant niche overlap. Therefore, the hybrid zone is best classified as a tension zone, maintained by intrinsic selection against hybrids. While the two banded newt species can evidently backcross, we see negligible introgression and the pattern is symmetric, which we interpret as supporting the fact that the hybrid zone has been practically stationary since its origin (while extensive hybrid zone movement has been suggested in other newt genera in the region). Our study illustrates the use of hybrid zone analysis to test cryptic species status. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ecology & Evolution (20457758) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1002/ece3.10442
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      – Code: eng
        Text: English
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        PageCount: 10
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      – SubjectFull: Hybrid zones
        Type: general
      – SubjectFull: Mitochondrial DNA
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      – SubjectFull: Newts
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      – SubjectFull: Nuclear DNA
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      – SubjectFull: Gene flow
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      – SubjectFull: Türkiye
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      – TitleFull: Hybrid zone analysis confirms cryptic species of banded newt and does not support competitive displacement since secondary contact.
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              Text: Sep2023
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