A Diverging Species within the Stewartia gemmata (Theaceae) Complex Revealed by RAD-Seq Data

Plants, Год журнала: 2024, Номер 13(10), С. 1296 - 1296

Опубликована: Май 8, 2024

Informed species delimitation is crucial in diverse biological fields; however, it can be problematic for complexes. Showing a peripatric distribution pattern, Stewartia gemmata and S. acutisepala (the complex) provide us with an opportunity to study boundaries among taxa undergoing nascent speciation. Here, we generated genomic data from representative individuals across the natural ranges of complex using restriction site-associated DNA sequencing (RAD-seq). Based on sequence assembled loci containing 41,436 single-nucleotide polymorphisms (SNPs) invariant sites, phylogenetic analysis suggested strong monophyly both acutisepala, latter was nested within former. Among individuals, one sampled Mt. Tianmu (Zhejiang) showed closest evolutionary affinity (which endemic southern Zhejiang). Estimated 2996 high-quality SNPs, genetic divergence between relatively low (an Fst 0.073 per-site basis). Nevertheless, observed proportion regions showing high differentiation windowed basis. Up 1037 bins value greater than 0.25, accounting 8.31% total. After SNPs subject linkage disequilibrium were pruned, principal component (PCA) that diverged along first second PCs some extent. By applying phylogenomic analysis, present determines variety diverging gemmata, providing empirical insights into speciation complex.

Язык: Английский

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Prediction of Environmentally Suitable Areas for Zephyranthes (Amaryllidaceae) in Mexico

Ecologies, Год журнала: 2024, Номер 5(4), С. 571 - 584

Опубликована: Окт. 16, 2024

The genus Zephyranthes is widely represented in Mexico, with 37 species of ornamental and medical importance. However, basic aspects the genus, such as environmental variables that determine its presence certain sites, have not yet been addressed, which limits knowledge ecology, potential applications possible conservation strategies. Potential distribution models were generated data on 13 Zephyranthes, using 28 bioclimatic edaphic maximum entropy method (Maxent). Of these variables, most important least correlated for each chosen by principal component analysis (PCA); occurrence obtained from digital platforms filtered to reduce spatial autocorrelation. resulting models, had AUC values > 0.90 Kappa index 0.6, addition being significant according results binomial test applied (p < 0.05). Maximum temperatures humidity, well annual precipitation, are relevant niche models. Most distributed biogeographic province Transmexican Volcanic Belt. concolor lindleyana largest range. restricted citrina sessilis. determinant neotropical affinity different those identified Nearctic species, reflecting differentiation, congruent evolutionary history Zephyranthes.

Язык: Английский

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Predicting potentially suitable Bletilla striata habitats in China under future climate change scenarios using the optimized MaxEnt model

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Окт. 24, 2024

Bletilla striata, an important traditional Chinese medicine resource, holds high medicinal and ornamental value. However, unscientific habitat selection for its cultivation has led to low yields poor quality as materials. The optimized MaxEnt model is a powerful tool analyzing the potential impacts of environmental factors on species distribution predicting changes under climate change. It offers great significance protection development B. striata in China. Based 269 records China 15 major factors, this study simulated patterns potentially suitable habitats four different change scenarios (SSP2.6, SSP4.5, SSP7.0, SSP8.5) three time periods (the current period, 2050s, 2070s). analysis was conducted using which exhibited predictive accuracy minimal overfitting. Solar radiation, annual temperature range, mean diurnal range vapor pressure were revealed dominant affecting distribution, their thresholds ≤ 16265.39 kJ/m²·d^{− 1}, 39.7℃, 12.6℃, 2.9 kPa, respectively. results showed that total 30.07×10⁵ km² conditions, mainly distributed 14 provinces or regions southern Under future predicted will decrease significantly over time, centroid at all levels shift northward. research can guide resource conservation, variety selection, cultivation.

Язык: Английский

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An integrative approach to the taxonomy of Oxymycterus paramensis (Rodentia, Cricetidae) and related nominal forms

Journal of Mammalogy, Год журнала: 2024, Номер unknown

Опубликована: Окт. 3, 2024

Abstract Oxymycterus includes 17 species of small- to medium-sized sigmodontine rodents. The taxonomy this genus has been widely studied, but several unresolved issues persist. One example is the Paramo Hocicudo, paramensis, which over its extended latitudinal range associated with nominal forms that have not evaluated an integrative approach. Based on phylogenetic analyses Cytb gene, qualitative and quantitative morphological characters, environmental niche modeling, we reexamined taxonomic status akodontius, jacentior, paramensis while considering recently recognized O. willkaurco. reconstruction guided subsequent analysis variation development models. Considering results in framework, observed congruence among phylogenetic, distribution models, models (a proxy indicating different preferences), support recognition 2 within concept s.l. At same time, did observe congruent for hypothesis from evidence, absence diagnostic or characters differentiating taxa. some lines evidence suggest interruption gene flow, see more recognizing existing names taxa at level: endemic Bolivia; akodontius (which priority jacentior), distributed southern Bolivia northwestern Argentina. However, recommend detailed studies test scenario advanced here.

Язык: Английский

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