Study of Parainfluenza virus type 1 isolated from Pigs     

Iv. Guenov  N. Pavlov 《Zoonoses and public health》1972,19(6):437-444

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Neuroscience. Zif and the survival of memory     

Izquierdo I  Cammarota M 《Science (New York, N.Y.)》2004,304(5672):829-830

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Neuer Serotyp 9 der Adenoviren des Rindes     

Iv. Guenov  Kr. Sartmadshiev  Iw. Schopov  Z. Shljabinkov  W. Fjodorov 《Zoonoses and public health》1970,17(10):1065-1066

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Untersuchungen zur Differenzierung von aus klinisch gesunden Kälbern isolierten Adenoviren     

Iv. Guenov  Iv. Schopov  Z. Shljabinkov  Kr. Sartmadshiev  W. Fjodorov  S. Simeonov 《Zoonoses and public health》1969,16(4):335-340

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Prion protein gene polymorphism in four West African sheep populations     

Amadou Traoré  Luis J. Royo  Adama Kaboré  Lucía Pérez-Pardal  Isabel álvarez  Iván Fernández  Laya Sawadogo  Hamidou H. Tamboura  Félix Goyache 《Tropical animal health and production》2012,44(7):1469-1472

A total of 162 individuals, belonging to three Burkinabé and one Niger sheep populations, were analysed for prion protein (PrP) gene polymorphism at codons 136, 154 and 171. The ARQ allele was the most frequent in both the Burkinabé (86.7%) and the Niger (67.5%) sheep populations. The highly sensitive allele VRQ was not found in the sampled individuals. The highly resistant ARR allele was in very low frequency in the Burkina-Sahel (4.4%) and Mossi (3.2%) populations and was not present in the Djallonké and Touareg populations. Only 4 out of 15 possible PrP genotypes were identified in the sampled individuals. No favourable ARR/ARR genotypes were found in either of the breeds. Sequencing a subgroup of the samples allowed the identification of other five polymorphisms on the PrP gene sequence at codons 116, 138, 151, 237 and 240. The very low frequency of the ARR allele in the West African sheep should dissuade the implementation of a preventive selection programme aimed to increase resistance to scrapie, to avoid an extreme erosion of the genetic stock.  相似文献   

Fostering sustainable water use in almond (Prunus dulcis Mill.) orchards in a semiarid Mediterranean environment     

Iván Francisco García-Tejero  Saray Gutiérrez Gordillo  Luciene Souza  Simón Cuadros-Tavira  Víctor Hugo Durán Zuazo 《Archives of Agronomy and Soil Science》2019,65(2):164-181

This work examines the long-term effects of deficit-irrigation (DI) practices in almond crop (Prunus dulcis Mill.) in agronomical and physiological terms. The trial was conducted during four-year monitoring period (2014–2017), in an experimental orchard (SW Spain), subjected to three irrigation regimes; i) a full-irrigation treatment (F_I), which received 100% of crop evapotranspiration (ET_C); ii) a regulated-deficit irrigation (RDI₅₀), which received 50% of ET_C during the kernel-filling period; and iii) a low-frequency deficit irrigation (LFDI), that was subjected to continuous periods of irrigation-restriction defined in terms of threshold values of leaf-water potential (Ψ_leaf) during the kernel-filling period. During the water stress period, there were monitored Ψ_leaf, stomatal conductance (g_s) and canopy temperature (T_C). Significant improvements in terms of water-use efficiency were found, as no differences in terms of yield between F_I and LFDI were found, leading to the conclusion that significant water savings (between 27 and 40%) can be achieved without compromising the yield. Moreover, threshold values of Ψ_leaf and thermal indicators were defined which will allow establishing future irrigation scheduling without compromising almond yield, especially when DI strategies are being applied.  相似文献   

Growth and biomass partitioning of nine provenances of Quillaja saponaria seedlings to water stress     

Carlos Magni  Paola Poch  Betsabé Abarca  Iván Grez  Eduardo Martínez 《Southern Forests》2019,81(2):103-109

Information on the morphological and physiological responses of seedlings to stressors, such as water stress, is required for successful early establishment of seedlings. We examined provenance variation in morphological and physiological traits of Quillaja saponaria Molina seeds from nine provenances representing a latitudinal transect across the species range in Chile. The seedlings were subjected to two water regimes (well-watered vs water restriction) in a nursery experiment, and growth, biomass, survival, and gas exchange traits were measured. As expected, well-watered seedlings exhibited a superior performance in all traits analysed. Provenance effects were significant for most of the morphological and physiological traits. In the growth and biomass analysis, the northernmost provenance showed the lowest survival, growth and dry biomass, whereas in the gas exchange analysis, the southern interior provenance showed the highest net photosynthesis, transpiration, stomatal conductance and water use efficiency. The interaction between water regimes and provenance was only significant for diameter and net photosynthesis. These results indicate that different provenances of Q. saponaria show a stable performance across different controlled drought conditions. This information is of relevance for sourcing seeds for the restoration of the species.  相似文献   

Frequency and distribution of foot lesions identified during cattle hoof trimming in the Province of Antioquia,Colombia (2011–2016)     

Correa-Valencia  Nathalia María  Castaño-Aguilar  Iván Rodrigo  Shearer  Jan K.  Arango-Sabogal  Juan Carlos  Fecteau  Gilles 《Tropical animal health and production》2019,51(1):17-24

Tropical Animal Health and Production - Lameness is a severe welfare problem in cattle and has a detrimental effect on longevity, productivity, and reproductive performance. This study aimed to...  相似文献   

Root-lesion and root-knot nematodes parasitizing potato     

Ivânia Esteves  Carla Maleita  Isabel Abrantes 《European journal of plant pathology / European Foundation for Plant Pathology》2015,141(2):397-406

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Recruitment of catarina scallop (Argopecten ventricosus) larvae on artificial collectors off the NE coast of the Gulf of California     

Gaspar Soria  Miguel F. Lavín  Iván Martínez‐Tovar  Alberto Macías‐Duarte 《Aquaculture Research》2013,44(9):1383-1398

We evaluated recruitment of larvae of catarina scallop, Argopecten ventricosus, in the area of Puerto Peñasco, NE Gulf of California. We moored artificial collectors in six sites from June 2007 to August 2008 and replaced them every 2 months. We used monthly (July 2002–September 2011) sea surface temperature (SST, °C) and surface chlorophyll‐a concentration (SSChl, mg m^?3) Aqua/MODIS satellite data to describe seasonal environmental behaviour study area. Also, we recorded bottom temperature at each site every 4 h, and every 2 months measured sea surface salinity, temperature and dissolved oxygen. We used a repeated measures anova to evaluate differences in the number of recruited spat between main factors, and analysed the presence of multimodal spat shell size frequency distributions. Overall, spat recruitment was negatively correlated with seawater temperature and showed higher spat recruitment abundances throughout winter, which is the season with the highest surface chlorophyll a concentration. We estimated multimodal shell size frequency distributions characterized by more than one modal size. The natural collection of A. ventricosus spat on artificial collectors in the area can be successfully performed over a protracted period (November–December to May–June). Our results extend the area where collection of A. ventricosus spat can be successful.  相似文献