The plot thickens: Haploid and triploid-like thalli, hybridization, and biased mating type ratios in Letharia

Sandra Lorena Ament-Velásquez, Veera Tuovinen, Linnea Bergström, Toby Spribille, Dan Vanderpool, Juri Nascimbene, Yoshikazu Yamamoto, Göran Thor & Hanna Johannesson
The study of the reproductive biology of lichen fungal symbionts has been traditionally challenging due to their complex and symbiotic lifestyles. Against the common belief of haploidy, a recent genomic study found a triploid-like signal in Letharia. Here, we used genomic data from a pure culture and from thalli, together with a PCR survey of the MAT locus, to infer the genome organization and reproduction in Letharia. We found that the read count variation in...
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