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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evidence of positive selection on six spider developmental genes

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Mariano-Martins, Pedro [1] ; Monfardini, Raquel Dietsche [1] ; Lo-Man-Hung, Nancy [1] ; Torres, Tatiana Teixeira [1]
Total Authors: 4
[1] Univ Sao Paulo, Inst Biosci, Dept Genet & Evolutionary Biol, A101, Tv 14 Butanta, BR-05508090 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Web of Science Citations: 0

Spiders constitute more than 49,000 described species distributed all over the world, and all ecological environments. Their order, Araneae, is defined by a set of characteristics with no parallel among their arachnid counterparts (e.g., spinnerets, silk glands, chelicerae that inoculate venom, among others). Changes in developmental pathways often underlie the evolution of morphological synapomorphies, and as such spiders are a promising model to study the role of developmental genes in the origin of evolutionary novelties. With that in mind, we investigated changes in the evolutionary regime of a set of six developmental genes, using spiders as our model. The genes were mainly chosen for their roles in spinneret ontogeny, yet they are pleiotropic, and it is likely that the origins of other unique morphological phenotypes are also linked to changes in their sequences. Our results indicate no great differences in the selective pressures on those genes when comparing spiders to other arachnids, but a few site-specific positive selection evidence were found in the Araneae lineage. These findings lead us to new insights on spider evolution that are to be further tested. (AU)

FAPESP's process: 18/06719-0 - Molecular bases of spinneret regeneration in spiders (Arachnida: Araneae)
Grantee:Pedro Mariano Martins
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 19/12282-7 - Discovering the developmental genetic basis of spinneret morphogenesis
Grantee:Nancy França Lo Man Hung
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 17/19616-2 - Evolution and development of spiders' spinnerets (Arachnida: Araneae)
Grantee:Nancy França Lo Man Hung
Support Opportunities: Scholarships in Brazil - Doctorate