The genetic structure of a widely distributed ginger is shaped by geographic barriers and introgression

The genetic structure of a widely distributed ginger is shaped by geographic barriers and introgression | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 31 January 2025 V1 Latest version Share on The genetic structure of a widely distributed ginger is shaped by geographic barriers and introgression Authors : Aleena Xavier 0000-0002-9171-0280 and Vinita Gowda [email protected] Authors Info & Affiliations https://doi.org/10.22541/au.173833171.19388605/v1 398 views 135 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Widely distributed (WD) species are known to exhibit phenotypic variations across their distributional range. However, there is no consensus regarding the underlying factors that contribute to this variation. Here we explore whether factors such as geological events, dispersal constraints, and hybridization events govern the genetic diversity within a WD species. We studied the widespread ginger lily Hedychium spicatum , found in the understory of the Asian tropical montane forests and is morphologically variable across its geographical range. Using single nucleotide polymorphisms (SNPs) and simple sequence repeats (SSRs) we investigated the genetic structure of H. spicatum using model-based and model-free approaches. Our results show that H. spicatum is shaped by historical factors such as i) demographic fluctuations due to glaciation in the Himalayas, ii) dispersal constraints, and more recent factors such as iii) ploidy variations, and iv) hybridization events. We identified intermediates, hybrid species, and cryptic species across its distributional range, which are a result of multiple instances of gene flow between the widely distributed H. spicatum and at least four co-occurring, congeneric hedychiums. We show that the Western Ghats population is an example of long-distance migration from the Himalayas, which is undergoing progenitor-derivative speciation, confusing taxonomists to wrongly identify H. venustum as a new species, rather than an admixed variant of H. spicatum . In summary, the morphological, genetic, and taxonomic complexities within H. spicatum highlights the emergent-system-like characteristics in this WD species, and that WD species provide a glimpse of speciation on a spatial scale. Supplementary Material File (introgression_ms_moleco(1) (1).docx) Download 9.81 MB Information & Authors Information Version history V1 Version 1 31 January 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords hybridization molecular evolution phylogeography plant mating systems population genetics - empirical speciation Authors Affiliations Aleena Xavier 0000-0002-9171-0280 Indian Institute of Science Education and Research Bhopal View all articles by this author Vinita Gowda [email protected] The George Washington University View all articles by this author Metrics & Citations Metrics Article Usage 398 views 135 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Aleena Xavier, Vinita Gowda. The genetic structure of a widely distributed ginger is shaped by geographic barriers and introgression. Authorea . 31 January 2025. DOI: https://doi.org/10.22541/au.173833171.19388605/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . Format Please select one from the list RIS (ProCite, Reference Manager) EndNote BibTex Medlars RefWorks Direct import Tips for downloading citations document.getElementById('citMgrHelpLink').addEventListener('click', function() { popupHelp(this.href); return false; }); $(".js__slcInclude").on("change", function(e){ if ($(this).val() == 'refworks') $('#direct').prop("checked", false); $('#direct').prop("disabled", ($(this).val() == 'refworks')); }); Cited by Ajith Ashokan, Vinita Gowda, Things aren't always black or white — Phylogenetic systematics of ginger‐lilies with insights into species complexes, TAXON, 75 , 2, (2025). https://doi.org/10.1002/tax.70081 Crossref Loading... View Options View options PDF View PDF Figures Tables Media Share Share Share article link Copy Link Copied! Copying failed. 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