Sequence of the Gonium pectorale mating locus reveals a complex and dynamic history of changes in volvocine algal mating haplotypes

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dc.contributor.author Hamaji, T.
dc.contributor.author Mogi, Y.
dc.contributor.author Ferris, P. J.
dc.contributor.author Mori, T.
dc.contributor.author Miyagishima, S.
dc.contributor.author Kabeya, Y.
dc.contributor.author Nishimura, Y.
dc.contributor.author Toyoda, A.
dc.contributor.author Noguchi, H.
dc.contributor.author Fujiyama, A.
dc.contributor.author Olson, Bradley J.
dc.contributor.author Marriage, Tara N.
dc.contributor.author Nishii, I.
dc.contributor.author Umen, J. G.
dc.date.accessioned 2016-09-20T14:53:47Z
dc.date.available 2016-09-20T14:53:47Z
dc.identifier.uri http://hdl.handle.net/2097/33962
dc.description Citation: Hamaji, T., Mogi, Y., Ferris, P. J., Mori, T., Miyagishima, S., Kabeya, Y., . . . Nozaki, H. (2016). Sequence of the Gonium pectorale mating locus reveals a complex and dynamic history of changes in volvocine algal mating haplotypes. G3: Genes, Genomes, Genetics, 6(5), 1179-1189. doi:10.1534/g3.115.026229
dc.description Additional Authors: Nozaki, H.
dc.description.abstract Sex-determining regions (SDRs) or mating-type (MT) loci in two sequenced volvocine algal species, Chlamydomonas reinhardtii and Volvox carteri, exhibit major differences in size, structure, gene content, and gametolog differentiation. Understanding the origin of these differences requires investigation of MT loci from related species. Here, we determined the sequences of the minus and plus MT haplotypes of the isogamous 16-celled volvocine alga, Gonium pectorale, which is more closely related to the multicellular V. carteri than to C. reinhardtii. Compared to C. reinhardtiiMT, G. pectoraleMT is moderately larger in size, and has a less complex structure, with only two major syntenic blocs of collinear gametologs. However, the gametolog content of G. pectoraleMT has more overlap with that of V. carteriMT than with C. reinhardtiiMT, while the allelic divergence between gametologs in G. pectorale is even lower than that in C. reinhardtii. Three key sex-related genes are conserved in G. pectorale MT: GpMID and GpMTD1 in MT-, and GpFUS1 in MT+. GpFUS1 protein exhibited specific localization at the plus-gametic mating structure, indicating a conserved function in fertilization. Our results suggest that the G. pectorale-V. carteri common ancestral MT experienced at least one major reformation after the split from C. reinhardtii, and that the V. carteri ancestral MT underwent a subsequent expansion and loss of recombination after the divergence from G. pectorale. These data begin to polarize important changes that occurred in volvocine MT loci, and highlight the potential for discontinuous and dynamic evolution in SDRs. © 2016 Hamaji et al.
dc.relation.uri https://doi.org/10.1534/g3.115.026229
dc.rights Attribution 4.0 International (CC BY 4.0)
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Chlamydomonas
dc.subject Evolution
dc.subject Genetics Of Sex
dc.subject Gonium
dc.subject Mating Locus
dc.subject Volvox
dc.title Sequence of the Gonium pectorale mating locus reveals a complex and dynamic history of changes in volvocine algal mating haplotypes
dc.type Article
dc.date.published 2016
dc.citation.doi 10.1534/g3.115.026229
dc.citation.epage 1189
dc.citation.issn 2160-1836
dc.citation.issue 5
dc.citation.jtitle G3: Genes, Genomes, Genetics
dc.citation.spage 1179
dc.citation.volume 6
dc.contributor.authoreid bjsco


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