Understanding the convoluted evolutionary history of the capped-golden langur lineage (Cercopithecidae: Colobinae)â�

Arekar, K and Parigi, A and Karanth, KP (2021) Understanding the convoluted evolutionary history of the capped-golden langur lineage (Cercopithecidae: Colobinae)â�. In: Journal of Genetics, 100 (2).

PDF jou_gen_100_2_2021.pdf - Published Version Restricted to Registered users only Download (803kB) | Request a copy

Abstract

The phylogenetic position of the capped and golden langur (CG) lineage has been ambiguous owing to the discordance between phylogenies from multiple molecular markers. Previous molecular studies have hypothesised that this discordance likely arises from either a hybridization event that took place between the Indian genus Semnopithecus and the Southeast Asian genus Trachypithecus or from incomplete lineage sorting (ILS). Distinguishing between hybridization and ILS is challenging and these processes can lead to serious difficulties in inferring phylogenies. In this study, we used genetic markers (nine nuclear and eight mitochondrial) in conjunction with coalescent based species tree approach and a test for hybridization using posterior predictive checking to better understand the evolutionary origin of the CG lineage. Both the concatenated nuclear as well as the mitochondrial dataset recovered congruent relationships where CG lineage was sister to Trachypithecus. However, nuclear species tree estimated using different multispecies coalescent methods suggested an opposite result, i.e. CG lineage was sister to Semnopithecus. Hybridization analysis strongly indicates gene flow between Semnopithecus and Trachypithecus that likely gave rise to the hybrid CG lineage. Further, the CG lineage is morphologically intermediate between Semnopithecus and Trachypithecus with respect to skull and body measurements. In light of the above evidences, we argue that the CG lineage needs to be elevated to a new genus of its own. Taxonomic and conservation implications of these results are also discussed. © 2021, Indian Academy of Sciences.

Item Type:	Journal Article
Publication:	Journal of Genetics
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer
Department/Centre:	Division of Biological Sciences > Centre for Ecological Sciences
Date Deposited:	22 Nov 2021 10:14
Last Modified:	22 Nov 2021 10:14
URI:	http://eprints.iisc.ac.in/id/eprint/70557

Actions (login required)

View Item