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We investigated intra- and inter-colony sequence variation in a population of the dom- inant Hawaiian coral Montipora capitata by analyzing marker gene and genomic data. Ribosomal ITS1 regions showed evidence of a reticulate history among the colonies, suggesting incomplete rDNA repeat homogenization. Analysis of the mitochondrial genome identified a major (M. capitata) and a minor (M. flabellata) haplotype in single polyp-derived sperm bundle DNA with some colonies containing 2-3 different mtDNA haplotypes. In contrast, Pax-C and newly identified single-copy nuclear genes showed either no sequence differences or minor variations in SNP frequencies segregating among the colonies. Our data suggest past mitochondrial introgression in M. capitata, whereas nuclear single-copy loci show limited variation, highlighting the divergent evolutionary histories of these coral DNA markers.
Putnam, H. M., Adams, D. K., Zelzion, E., Wagner, N. E., Qiu, H., Mass, T., ... Bhattacharya, D. (2017). Divergent evolutionary histories of DNA markers in a Hawaiian population of the coral Montipora capitata. PeerJ, 5, e3319. doi: 10.7717/peerj.3319.
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