Article
Multidisciplinary Sciences
Oscar M. Vargas, Santiago Madrinan, Beryl Simpson
Summary: This study aims to test whether the endemic genus Linochilus undergoes more speciation through geographic isolation. The results show that 80% of recent speciation events are driven by geographic isolation, while only 6.7% are attributed to parapatric ecological speciation.
Article
Plant Sciences
Tone Novak, Ljuba Slana Novak, Peter Kozel, Miriam Gudrun Schaider, Christian Komposch, Saska Lipovsek, Jan Podlesnik, Igor Pausic, Gunther Raspotnig
Summary: The study identified four species within the Nemastoma bidentatum complex and six subspecies within N. bidentatum s. str., with six subspecies present in Slovenia. Hybrids were found in contact zones between adjacent subspecies, but absent between distant subspecies. The taxonomic distinction of lineages/subspecies is congruent with their distribution patterns.
EUROPEAN JOURNAL OF TAXONOMY
(2021)
Article
Biochemistry & Molecular Biology
Camille Kessler, Eric Wootton, Aaron B. A. Shafer
Summary: Under the ecological speciation model, divergent selection creates barriers to gene flow and leads to reproductive isolation. Hybridisation can both promote and inhibit speciation. Using white-tailed and mule deer, we found negligible ancestral introgression and no divergence with gene flow, but localized allopatric and balancing selection. Balancing selection affected genes related to immunity, MHC, and smell perception, consistent with deer biology. The lack of historical gene flow suggests spatial separation during glaciation cycles and differentiation via genetic drift. Dobzhansky-Muller incompatibilities and selection against hybrids are hypothesized to be acting, and diversity correlations suggest advanced speciation.
Article
Biochemistry & Molecular Biology
Fern Spaulding, Jessica F. McLaughlin, Rebecca G. Cheek, Kevin G. McCracken, Travis C. Glenn, Kevin Winker
Summary: This study examines the divergence and speciation processes in a clade of ducks and reveals the uncertain relationships and species limits within the green-winged teal complex. By analyzing mitochondrial and genome-wide nuclear DNA, the researchers determined the phylogenetic relationships and gene flow among different lineages. The results showed that while nuclear DNA suggests three subspecies and a close relative from South America, the mitochondrial genomes revealed a different phylogeny. The study highlights the power of ultraconserved elements in studying systematics and population genomics in cases with uncertain relationships and species limits.
MOLECULAR PHYLOGENETICS AND EVOLUTION
(2023)
Article
Multidisciplinary Sciences
Xinfeng Wang, Ziwen He, Zixiao Guo, Ming Yang, Shaohua Xu, Qipian Chen, Shao Shao, Sen Li, Cairong Zhong, Norman C. Duke, Suhua Shi
Summary: In the conventional view, species are separate gene pools delineated by reproductive isolation (RI). In an alternative view, species may also be delineated by a small set of 'speciation genes' without full RI, a view that has gained broad acceptance. A recent study on two closely related mangrove species (Rhizophora mucronata and R. stylosa) found that despite being sympatric, their genomes remained well delineated with only small introgression blocks. These findings suggest that true 'good species' may continue to exchange genes long after speciation, but detecting such exchanges is challenging.
NATIONAL SCIENCE REVIEW
(2022)
Article
Multidisciplinary Sciences
Ning Sun, Liandong Yang, Fei Tian, Honghui Zeng, Ziwen He, Kai Zhao, Cheng Wang, Minghui Meng, Chenguang Feng, Chengchi Fang, Wenqi Lv, Jing Bo, Yongtao Tang, Xiaoni Gan, Zuogang Peng, Yiyu Chen, Shunping He
Summary: This study examines genome-wide variation in two species of cyprinid fishes in Lake Sunmcuo on the Qinghai-Tibet Plateau and identifies numerous large genomic islands associated with speciation with gene flow. These islands harbor divergent genes related to olfactory receptors, indicating their potential role in food selection and assortative mating. The findings support the hypothesis of parapatric speciation rather than sympatric speciation.
NATIONAL SCIENCE REVIEW
(2022)
Article
Plant Sciences
Kristyna Semberova, Marek Svitok, Karol Marhold, Jan Suda, Roswitha E. Schmickl
Summary: This study investigated the morphological and environmental differentiation of diploid, tetraploid, and hexaploid cytotypes of Campanula rotundifolia agg. The results showed that reproductive isolation mechanisms vary between cytotypes, and higher polyploids exhibit morphological differences compared to other cytotypes.
Article
Plant Sciences
Nuria Garcia-Jacas, Jordi Lopez-Pujol, Neus Nualart, Sonia Herrando-Moraira, Konstantin Romaschenko, Ming-Xun Ren, Alfonso Susanna
Summary: Centaurea subsection Phalolepis has been analyzed using microsatellites in four speciation centers: Anatolia, Greece, the Italian Peninsula, and the Iberian Peninsula. Taxon diversity was found to be correlated with mountains. The study supported the mountain-geobiodiversity hypothesis (MGH) and confirmed that altitude, climate fluctuations, and rugged terrain are important triggers for radiations in mountains.
Article
Plant Sciences
Rui-Hong Wang, Zhao-Ping Yang, Zhi-Cheng Zhang, Hans Peter Comes, Zhe-Chen Qi, Pan Li, Cheng-Xin Fu
Summary: This study conducted a phylogeographic analysis of plants in the Qinghai-Tibet Plateau and surrounding regions, and found that the speciation and diversification of temperate steppes and deserts were closely related to the climate change during the Plio-Pleistocene period.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Microbiology
Mason Munro-Ehrlich, Daniel B. Nothaft, Elizabeth M. Fones, Juerg M. Matter, Alexis S. Templeton, Eric S. Boyd
Summary: This study investigates the distribution and evolution of microbial life in subsurface environments by sampling fractured waters from different depth intervals in a borehole in the Samail Ophiolite. Metagenomic sequencing reveals that aerobes are more abundant in near surface waters while anaerobes dominate at depth. Furthermore, genomic data suggests the possibility of parapatric speciation and gene flow between different populations of Meiothermus.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Multidisciplinary Sciences
Sally Kanamori, Kanto Nishikawa, Masafumi Matsui, Shingo Tanabe
Summary: Based on genetic and morphological surveys, this study identifies three genetic groups within Hynobius hirosei, with the Nanyo group being described as a new species. The Nanyo group shows distinct morphological differences compared to other samples.
Article
Ecology
Emily Buckingham, Jeffrey W. W. Streicher, M. Caitlin Fisher-Reid, Tereza Jezkova, John J. J. Wiens
Summary: A study found that formerly sympatric Plethodon cinereus populations on Long Island have separated into different populations, contrary to the conventional speciation scenario.
ECOLOGY AND EVOLUTION
(2022)
Article
Biochemistry & Molecular Biology
Vanessa Luzuriaga-Aveiga, Mauricio Ugarte, Jason T. Weir
Summary: In this study, coalescent modelling was used to analyze two weakly diverged species of elevationally replacing Ramphocelus tanagers. The results showed that while the majority of the genome has fused due to high gene flow, select loci associated with plumage color remain divergent, maintaining geographical color differences between the incipient species.
Article
Ecology
Nicolas Leroux, Francois-Etienne Sylvain, Eric Normandeau, Aleicia Holland, Adalberto Luis Val, Nicolas Derome
Summary: Lowland central Amazonia is characterized by heterogeneous riverscapes dominated by chemically divergent black and white waters. Recent studies have found that ecological divergence plays a role in the genetic differentiation of fish in these environments, but neutral evolutionary processes explain most of the divergence between populations of Mesonauta festivus.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Biochemistry & Molecular Biology
Naoko P. Kurata, Michael J. Hickerson, Sandra L. Hoffberg, Ned Gardiner, Melanie L. J. Stiassny, S. Elizabeth Alter
Summary: Freshwater fishes exhibit notable diversity despite occupying a small fraction of the earth's surface. Research suggests that high-energy rapids can act as physical barriers affecting gene flow direction, but also provide multidirectional dispersal opportunities for riverine fishes in certain temporal and spatial scales.
Article
Statistics & Probability
Pi-Wen Tsai, Steven Gilmour
Article
Biology
Ching-Shui Cheng, Pi-Wen Tsai
Article
Biochemistry & Molecular Biology
Carol K. L. Yeung, Pi-Wen Tsai, R. Terry Chesser, Rong-Chien Lin, Cheng-Te Yao, Xiu-Hua Tian, Shou-Hsien Li
MOLECULAR BIOLOGY AND EVOLUTION
(2011)
Article
Statistics & Probability
Ching-Shui Cheng, Pi-Wen Tsai
Article
Statistics & Probability
Ching-Shui Cheng, Pi-Wen Tsai
Article
Statistics & Probability
Pi-Wen Tsai, Steven G. Gilmour
Article
Statistics & Probability
Pi-Wen Tsai, Steven G. Gilmour, Roger Mead
JOURNAL OF STATISTICAL PLANNING AND INFERENCE
(2007)
Article
Mathematics, Applied
Pi-Wen Tsai, Steven G. Gilmour, Roger Mead
UTILITAS MATHEMATICA
(2006)
Article
Statistics & Probability
PW Tsai, SG Gilmour, R Mead
Article
Biology
PW Tsai, SG Gilmour, R Mead