A New Species of the Genus Plagiocephalus (Diptera, Ulidiidae) from Central America

Описан Plagiocephalus intermedius Kameneva, sp. n. из Коста-Рики, который отличается от других видов рода более короткими стебельками глаз, а также рисунком, жилкованием и формой крыла самца и окраской головы и жилкованием крыла самки. Приведена таблица для определения видов рода Plagiocephalus Wiedemann. Обозначен лектотип Achias lobularis Wiedemann.Plagiocephalus intermedius Kameneva, sp. n. from Costa Rica is described. It differs from two other species by shorter eye stalks and pattern, venation and shape of the wing in male and head coloration and wing venation in female. A key to species of the genus Plagiocephalus Wiedemann is provided. The lectotype of Achias lobularis Wiedemann is designated

A New Genus and Species of the Tribe Lipsanini (Diptera, Ulidiidae) from Central America

Vladolinia dolini Kameneva, gen. et sp. n. from Costa Rica is described. It superficially resembles Zacompsia Coquillett in the elongate head and body and similar wing pattern, differing by the eye longer than high, acute fronto-facial angle, prominent clypeus, wide anal lobe and conical, dorsally protruding scutellum.Описан Vladolinia dolini Kameneva, gen. et sp. n. из Коста-Рики, который внешне напоминает виды рода Zacompsia Coquillett продолговатой формой головы и телa, а также сходным рисунком крыла, отличаясь от них шириной анальной лопасти крыла, горизонтально-овальной формой глаза, наличием острого угла между лицом и лбом, выступающим наличником и конусообразным, вертикально удлиненным щитком

Breeding value of drought-resistant sterile sorghum lines

Currently, breeders often use multidimensional statistics methods to process a large set of experimental data. To characterize the breeding value of 20 sorghum lines with cytoplasmic male sterility (CMS lines) under arid cultivation conditions, during the research there was applied a cluster analysis, allowing to group the lines into clusters according to similar indicators from 15 analyzed agronomic and physiological characteristics. The studies were carried out during 2019-2021, various in meteorological conditions: the hydrothermal coefficient was 0.59-0.84 during the vegetation period of plants. Cytoplasmic male sterility lines were sown at a density of 100 thousand plants per 1 hectare. Breeding and physiological traits were evaluated according to generally accepted methods. The assessment of agronomic and physiological characteristics was carried out according to generally accepted methods. For further practical work, based on the results of the conducted studies, four CMS lines of grain sorghum (clusters 2, 3, 5) were identified according to a complex of physiological and breeding characteristics. Sterile lines (A2 Vostorg, M35-1А Pischevoe 614, A3 Feterita 14 and A2 KVV 114) were distinguished by the highest seed yield of 3.02-3.50 t/ha, high water content (72.7-73.7 %) and water retention capacity of leaves (72.2-84.3 %), low water deficiency (6.5-8.7 %). The study of moisture loss during the natural wilting of leaves confirmed the high resistance to drought in the flowering phase of the sterile A2 KVV 114 line, in which the intensity of moisture loss after 1 hour was only 9.9 %, 1.5 h – 15.8 % and 24 h – 68.6 %. In breeding for increasing drought resistance the CMS-line A1 Efremovskoe 2 (the sixth cluster) should be noted, as it was inferior to the above-described lines only in terms of low water deficiency (16.5 %), indicating average drought resistance. The line is the tallest with large leaves (length – 46.7 cm, area – 163.8 cm2) and form 3.21 t/ha of seeds on average for the period presented. The use of the obtained data provides the increasing of the breeding process for the creation of productive drought-resistant F1 sorghum hybrids

Associative Field of Ethnonym-Stimulus ‘Teleuts’ in Ethnic Self-Identification Modeling of Bachat Teleuts

The ethnic component, represented in the linguistic consciousness of the teleuts, a small indigenous people living on the territory of the Kemerovo region — Kuzbass, is considered. The associative field, built on the basis of reactions to the ethnonymstimulus ‘teleuts’, was analyzed using partofspeech and attributive methods and the method of associative ethnic portraits proposed by T. A. Ershova. The data obtained supplement the available information of anthropologists, local historians and cultural scientists about the national selfconsciousness of the teleuts. It is proved that the teleuts have a positive ethnic identity. The dominant number of associates for the wordethnonym ‘teleuts’ have a complex of positive additional emotional, evaluative and expressive meanings. For the participants in the experiment, it turned out to be important commonality based on family kinship, reassessment of their ethnic group, the significance and uniqueness of which are the result of not only the presence of a developed system of original customs and traditions, but also its small number. The teleuts define themselves as a small indigenous people living on the territory of the Kemerovo region, whose representatives are carriers of a wide range of positive qualities and their own unique culture. Modeling of the ethnic selfidentification of the Bachat teleuts on the basis of a comparison of associative fields, actualized by the ethnonym and endoethnonyms, seems promising

Assessment of drought resistance in sorghum CMS lines based on various sterility sources

Background. Global climate changes have recently led to a more frequent occurrence of adverse factors and a decrease in the productivity of major crops. Sorghum is a highly drought-resistant crop that can tolerate long-term soil and air droughts with much lower harvest losses than wheat or barley. It is important to understand physiological mechanisms affecting drought tolerance when breeding efforts are aimed at improving the adaptability to abiotic conditions and productivity of sorghum hybrids.Materials and methods. Twenty sterile lines of grain sorghum with 8 types of CMS were studied in 2019 and 2020 in the arid conditions of Saratov Province. Indicators of the leaf water regime were assessed according to VIR’s guidelines. Statistical processing of the research results was performed using the AGROS 2.09 software.Results. The indicators of the leaf water regime that reflected differentiated responses of the CMS-line plants to the prevailing water and temperature stressors during the critical flowering period for sorghum were analyzed. Four CMS lines were identified according to the chosen set of indicators: they manifested 71.13–72.02% of total water content, 5.26–9.08% of water deficit, and 57.40–83.17% of water retention capacity on average for the two years of research. For the first time, the effect of CMS in sorghum on the manifestation of water regime indicators was registered. In isonuclear CMS lines, the greatest effect on drought resistance was shown by cytoplasm A3 versus A4 (with the Zheltozernoe 10 genome), cytoplasm A5 versus A1 (with the Karlik 4v genome), and M35-1A versus the analog on cytoplasm 9E (with the Pischevoe 614 genome).Conclusion. It is shown that genetically different types of sterility can be used in breeding practice to increase the resistance to abiotic stressors in components of F1 crosses and hybrids

Normal-state resistivity anisotropy in underdoped RBa_2Cu_3O_{6+x} crystals

We have revealed new features in the out-of-plane resistivity rho_c of heavily underdoped RBa_2Cu_3O_{6+x} (R=Tm,Lu) single crystals, which give evidence for two distinct mechanisms contributing the c-axis transport. We have observed a crossover towards "metal-like" (d rho_c/d T > 0) behavior at the temperature T_m which quickly increases with decreasing doping. The "metal-like" conductivity contribution dominates at T < T_m and provides a saturation of the resistivity anisotropy, rho_c / rho_{ab}. The antiferromagnetic ordering is found to block this "metal-like" part of the c-axis conductivity and complete decoupling of CuO_2 planes, which may be the reason of superconductivity disappearance.Comment: RevTex, 4 pages including 4 eps figures. To be published in Phys.Rev.Let

Peculiarities of electronic heat capacity of thulium cuprates in pseudogap state

Precise calorimetric measurements have been carried out in the 7 - 300 K temperature range on two ceramic samples of thulium 123 cuprates TmBa2Cu3O6.92 and TmBa2Cu3O6.70. The temperature dependence of the heat capacity was analyzed in the region where the pseudogap state (PGS) takes place. The lattice contribution was subtracted from the experimental data. The PGS component has been obtained by comparing electronic heat capacities of two investigated samples because the PGS contribution for the 6.92 sample is negligible. The anomalous behavior of the electronic heat capacity near the temperature boundary of PGS was found. It is supposed that this anomaly is due to peculiarities in N(E) function where N is the density of electronic states and E is the energy of carriers of charge.Comment: 12 pages, 3 Postscript figure

Bond graph modelling of chemoelectrical energy transduction

Energy-based bond graph modelling of biomolecular systems is extended to include chemoelectrical transduction thus enabling integrated thermodynamically-compliant modelling of chemoelectrical systems in general and excitable membranes in particular. Our general approach is illustrated by recreating a well-known model of an excitable membrane. This model is used to investigate the energy consumed during a membrane action potential thus contributing to the current debate on the trade-off between the speed of an action potential event and energy consumption. The influx of Na+ is often taken as a proxy for energy consumption; in contrast, this paper presents an energy based model of action potentials. As the energy based approach avoids the assumptions underlying the proxy approach it can be directly used to compute energy consumption in both healthy and diseased neurons. These results are illustrated by comparing the energy consumption of healthy and degenerative retinal ganglion cells using both simulated and in vitro data