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Citation for Study 21262

About Citation title: "The impact of phenotypic and molecular data on the inference of Colletotrichum diversity associated with Musa".
About Study name: "The impact of phenotypic and molecular data on the inference of Colletotrichum diversity associated with Musa".
About This study is part of submission 21262 (Status: Published).

Citation

Vieira W.D., Lima W.G., Nascimento E.S., Michereff S.J., Camara M.P., & Doyle V.P. 2017. The impact of phenotypic and molecular data on the inference of Colletotrichum diversity associated with Musa. Mycologia, 109(6): 912-934.

Authors

  • Vieira W.D. (submitter) Phone 5581997315637
  • Lima W.G.
  • Nascimento E.S.
  • Michereff S.J.
  • Camara M.P.
  • Doyle V.P.

Abstract

Developing a comprehensive and reliable taxonomy for the Colletotrichum gloeosporioides species complex will require adopting data standards on the basis of an understanding of how methodological choices impact morphological evaluations and phylogenetic inference. We explored the impact of methodological choices in a morphological and molecular evaluation of Colletotrichum species associated with banana in Brazil. The choice of alignment filtering algorithm has a significant impact on topological inference and the retention of phylogenetically informative sites. Similarly, the choice of phylogenetic marker affects the delimitation of species boundaries, particularly if low phylogenetic signal is confounded with strong discordance, and inference of the species tree from multiple-gene trees. According to both phylogenetic informativeness profiling and Bayesian concordance analyses, the most informative loci are DNA lyase (APN2), intergenic spacer (IGS) between DNA lyase and the mating-type locus MAT1-2-1 (APN2/MAT-IGS), calmodulin (CAL), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), glutamine synthetase (GS), β-tubulin (TUB2), and a new marker, the intergenic spacer between GAPDH and an hypothetical protein (GAP2-IGS). Cornmeal agar minimizes the variance in conidial dimensions compared with potato dextrose agar and synthetic nutrient-poor agar, such that species are more readily distinguishable based on phenotypic differences. We apply these insights to investigate the diversity of Colletotrichum species associated with banana anthracnose in Brazil and report C. musae, C. tropicale, C. theobromicola, and C. siamense in association with banana anthracnose. One lineage did not cluster with any previously described species and is described here as C. chrysophilum.

Keywords

Alignment uncertainty, anthracnose, culture media, genealogical concordance phylogenetic species recognition, phylogenetic signal, 1 new taxon

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About this resource

  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S21262
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