Morphological contrasting
I scored adult specimen skins maintained in the STRIBC (Letter =67), this new American Museum regarding Natural Records (AMNH, Letter =25), and You Federal Art gallery bird collection (USNM, N = 10) from Costa Rica, Panama, and Colombia for each and every regarding around three phenotypic attributes: i) dorsal plumage, ii) ventral plumage, and you may iii) facial secure ornamentation. Following the , MJM, Sel, or more to 3 other perceiver (pick Additional file 1: Table S1) obtained for each and every bird independently to the a measure from 0 – step one, in which 0 depicted an excellent phenotypically natural Jacana spinosa, and step one illustrated a good phenotypically absolute Jacana jacana (centered on contrasting having skins of outside the get in touch with area), and then we averaged the fresh ratings for every characteristic once the phenotypic crossbreed directory for every specimen . Specimens having phenotypic crossbreed indicator lower than 0.ten was classified once the “pure” spinosa, when you’re a collection regarding 0.90 or higher are obtained while the “pure” jacana. A get between 0.ten and you can 0.25 try categorized since the “spinosa-like”, while a catalog between 0.75 and you will 0.ninety is actually categorized because “jacana-like”. Specimens with indices anywhere between 0.twenty five and 0.75 was categorized since “hybrids”.
Hereditary analysis
We sequenced a good 652 legs couple fragment of the mitochondrial cytochrome oxidase We gene (COI: this new DNA barcode fragment) of 59 Panamanian jacanas, and a couple specimens off east Honduras provided for the data from the J. Klicka therefore the Marjorie Barrick Museum. We chose that it gene for taking advantageous asset of present series data into Genbank for jacanas away from diverse geographical regions, that have been as well as put in this new dataset (N = 10). Laboratory strategies go after standard procedures which have been revealed someplace else . I attempted but were not able to generate series study regarding bottom pad extractions about Smith and you will Emlen selection of specimens.
The fresh new COI analysis were used to help you guess new genetic distinctiveness regarding the 2 jacana kinds and infer enough time out of speciation anywhere between J. spinosa and you may J. jacana, and to assess the degree that topography constraints gene move during the jacanas (we.age. isolation-by-distance). We produced median-joining community for the PopART . We utilized Super so you can calculate the typical distance using the HKY brand of molecular evolution to help you contrast divergence in the jacanas to other avian varieties wherein hereditary point might have been computed utilising the HKY model .
I checked out for the effect of geographical distance for the hereditary distinctions (i.e., isolation of the distance) via good Mantel shot then followed regarding program Alleles in space , and this measures up hereditary and geographical ranges one of individuals instead of populations. Both for J. spinosa and J. jacana mtDNA succession set, we correlated uncorrected pairwise succession divergence with pairwise geographical distance to possess all of the it is possible to sets. Significance of the new correlation try dependent on comparing this new noticed correlation to arbitrary correlations based on ten,100 permutations.
To help you fit the brand new mtDNA-founded analyses away from genetic introgression across the jacana hybrid area, i sequenced a couple autosomal introns (gapdh 11: , and you may 10551: ) for STRIBC specimens compiled round the Panama. According to an initial assessment out of https://kissbrides.com/no/armenske-bruder/ series type off a number of products away from for every geographic endpoint (beyond your hybrid zone) of your sampling design, i recognized a single nucleotide polymorphism for each and every intron: gapdh 3- anti-experience position 136 (cytosine-thymine: C-T changeover), and you will 10551 standing 153 (adenine-guanine: A-G change). Ranking is actually according to lined up sequences each and every intron into the J. spinosa decide to try MJM8238 (Genbank accessions: gapdh: KM891734, 10551: KM891735).
Cline profile analyses
We estimated the shape of the phenotypic and genotypic clines using ClineFit , which applies the cline fitting formulas developed by Szymura and Barton . The shape of a cline is determined by three formulas. The first formula (1) defines a symmetric S-shaped curve around the center of the hybrid zone, and relies on two parameters: c – for the center of the curve, and w – which is 1/maximum slope of the cline, and represents the cline width. Two additional formulae define the cline tails (2,3) and add four additional parameters: z L and z R , which represent the distance from c to a vertical asymptote for the exponential decay of allele frequencies to the left and right sides of the hybrid zone, while ? L and ? R define the rates of this exponential decay relative to the shape of the central cline (1).