5S-IGS rDNA in wind-pollinated trees (Fagus L.) encapsulates 55 million years of reticulate evolution and hybrid origins of modern species.

Autor: Cardoni S; Department of Agricultural and Forestry Science (DAFNE), Università degli studi della Tuscia, Viterbo, 01100, Italy., Piredda R; Department of Veterinary Medicine, University of Bari 'Aldo Moro', Valenzano, 70010, Italy., Denk T; Swedish Museum of Natural History, Stockholm, 10405, Sweden., Grimm GW; Unaffiliated, Orléans, France., Papageorgiou AC; Department of Molecular Biology and Genetics, Democritus University of Thrace, Alexandroupolis, Greece., Schulze ED; Max-Planck Institute for Biogeochemistry, Jena, 07701, Germany., Scoppola A; Department of Agricultural and Forestry Science (DAFNE), Università degli studi della Tuscia, Viterbo, 01100, Italy., Salehi Shanjani P; Natural Resources Gene Bank, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization, Tehran, Iran., Suyama Y; Graduate School of Agricultural Science, Tohoku University, Osaki, Miyagi, 989-6711, Japan., Tomaru N; Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi, 464-8601, Japan., Worth JRP; Ecological Genetics Laboratory, Forestry and Forest Products Research Institute (FFPRI), Tsukuba, Ibaraki, 305-8687, Japan., Cosimo Simeone M; Department of Agricultural and Forestry Science (DAFNE), Università degli studi della Tuscia, Viterbo, 01100, Italy.
Jazyk: angličtina
Zdroj: The Plant journal : for cell and molecular biology [Plant J] 2022 Feb; Vol. 109 (4), pp. 909-926. Date of Electronic Publication: 2021 Nov 29.
DOI: 10.1111/tpj.15601
Abstrakt: Standard models of plant speciation assume strictly dichotomous genealogies in which a species, the ancestor, is replaced by two offspring species. The reality in wind-pollinated trees with long evolutionary histories is more complex: species evolve from other species through isolation when genetic drift exceeds gene flow; lineage mixing can give rise to new species (hybrid taxa such as nothospecies and allopolyploids). The multi-copy, potentially multi-locus 5S rDNA is one of few gene regions conserving signal from dichotomous and reticulate evolutionary processes down to the level of intra-genomic recombination. Therefore, it can provide unique insights into the dynamic speciation processes of lineages that diversified tens of millions of years ago. Here, we provide the first high-throughput sequencing (HTS) of the 5S intergenic spacers (5S-IGS) for a lineage of wind-pollinated subtropical to temperate trees, the Fagus crenata - F. sylvatica s.l. lineage, and its distant relative F. japonica. The observed 4963 unique 5S-IGS variants reflect a complex history of hybrid origins, lineage sorting, mixing via secondary gene flow, and intra-genomic competition between two or more paralogous-homoeologous 5S rDNA lineages. We show that modern species are genetic mosaics and represent a striking case of ongoing reticulate evolution during the past 55 million years.
(© 2021 The Authors. The Plant Journal published by Society for Experimental Biology and John Wiley & Sons Ltd.)
Databáze: MEDLINE
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