scholarly journals Genetic and phenotypic trends for weights of major beef and dual-purpose cattle breeds in Slovak Republic

2020 ◽  
Vol 23 (3) ◽  
pp. 174-191
Author(s):  
Ján Tomka ◽  
Ján Huba ◽  
Milan Kumičík
Keyword(s):  
Beef Cattle ◽  
Slovak Republic ◽  
Genetic Evaluation ◽  
The Other ◽  
Genetic Progress ◽  
Dual Purpose ◽  
Cattle Breeds ◽  
Other Hand ◽  
Dual Purpose Cattle ◽  
Further Development

Genetic evaluation of beef cattle in Slovakia started in first years of this century. After the first decade of running the routine evaluations it is important to review the progress made and to discuss the further development. The aim of this paper was to compile and deliver genetic and phenotypic trends in order to review importance of evaluated traits with respect to four major beef (Charolais, Limousine) and dual-purpose breeds (Slovak Pinzgau cattle, Slovak Spotted cattle). The study showed different progress made across the breeds. Higher genetic progress was observed in Charolais purebreds compared to Limousine counterparts. Moreover, almost similar progress to that in Charolais was observed in dual-purpose Slovak Pinzgau cattle. On the other hand no progress was observed in Slovak Spotted purebreds. Results also showed higher progress in bulls compared to cows. Phenotypic trends showed reserves for improvement in Charolais and closing to breed standards in Limousine. In dualpurpose breeds improvement was shown only in Slovak Pinzgau, while no improvement or decrease in actual weights was shown in Slovak Spotted purebreds.

scholarly journals DEVELOPMENT OF THE MODEL OF STUDENTS’ INDEPENDENT WORK UNDER CONDITIONS OF DISTANCE LEARNING

2021 ◽  
pp. 273-289
Author(s):  
Olena Osadcha
Keyword(s):  
Distance Learning ◽  
Information Technologies ◽  
The Other ◽  
Advantages And Disadvantages ◽  
Other Hand ◽  
The One ◽  
Independent Work ◽  
Further Development

The article deals with the development of the model of students’ independent work under conditions of distance learning. The importance of the research into this problem is determined, on the one hand, by the growing possibilities of using various information technologies and, on the other hand by the necessity to adapt to the conditions of today’s world where independent work of students is becoming increasingly important. The advantages and disadvantages of distance learning have been explored. The author studied the role of independent work in the formation of the professional competences of students. The issue of modeling in the area of education has been tackled. The approaches to the development of the model of independent work have been identified and analyzed. The components of the model, such as the goal, the tasks, the content, the methods, the means and evaluation of results have been determined and characterized. The prospects of further development of this research are related to the exploration of models of independent work of students majoring in different areas.

scholarly journals Colostrum composition and immunoglobulin G content in dairy and dual-purpose cattle breeds

2020 ◽  
Vol 98 (8) ◽  
Author(s):  
Evelyne C Kessler ◽  
Rupert M Bruckmaier ◽  
Josef J Gross
Keyword(s):  
Dairy Cows ◽  
Immunoglobulin G ◽  
Passive Immunization ◽  
Mature Milk ◽  
Dual Purpose ◽  
Cattle Breeds ◽  
Holstein Friesian ◽  
Essential Components ◽  
Dual Purpose Cattle ◽  
And Performance

Abstract Immunoglobulins (Ig) are essential components in the colostrum of bovine species that enable passive immunization of newborn calves. Concentrations of fat and protein are greater in colostrum compared with mature milk and represent a vital source of energy and nutrients. Colostral IgG was shown to vary between individual dairy cows, but comparative data on different breeds and performance levels are scarce. The objective of the present field study was to investigate the contents of total IgG, fat, protein, and lactose in colostrum in different Swiss and German dairy and dual-purpose breeds. We collected colostrum samples of 458 cows of 13 different breeds (dairy breeds: Brown Swiss, Swiss and German Holstein Friesian, and New Zealand Holstein; dual-purpose breeds: German Fleckvieh, Holstein Friesian × Montbéliarde, Montbéliarde, Murnau-Werdenfels, Original Braunvieh, Pinzgauer, Rhetic Gray, and Simmental; and beef-type crossbred: Charolais × Holstein Friesian). Colostrum samples were obtained between 5 and 900 min after calving and analyzed for total IgG, fat protein, and lactose contents. Immunoglobulin G concentrations varied between 12.7 and 204.0 mg/mL. No effect of breeding purpose (i.e., dairy or dual-purpose) nor of previous lactation yield on IgG content was observed. However, milking of cows for the first time later than 12 h after parturition resulted in lower colostrum IgG concentrations compared with colostrum harvest within 9 h after calving (P < 0.05). Multiparous cows had a higher colostral IgG concentration than primiparous cows (P < 0.0001). Overall, concentrations of IgG and other constituents in colostrum varied widely in the different cattle breeds. High-yielding dairy cows did not have poorer colostrum quality compared with lower-yielding animals or beef and dual-purpose breeds, which suggests an individually different transfer of circulating IgG into colostrum.

scholarly journals Investigation of the DGAT1 K232A and VNTR mutations in dairy and dual purpose cattle breeds

2007 ◽  
Vol 6 (sup1) ◽  
pp. 137-137 ◽  
Author(s):  
L. Fontanesi ◽  
E. Scotti ◽  
F. Schiavini ◽  
V. La Mattina ◽  
R. Davoli ◽  
...  
Keyword(s):  
Dual Purpose ◽  
Cattle Breeds ◽  
Dual Purpose Cattle

scholarly journals Investigation of allele frequencies of the growth hormone receptor(GHR) F279Ymutation in dairy and dual purpose cattle breeds

2007 ◽  
Vol 6 (4) ◽  
pp. 415-420 ◽  
Author(s):  
Luca Fontanesi ◽  
Emilio Scotti ◽  
Marco Tazzoli ◽  
Francesca Beretti ◽  
Stefania Dall’Olio ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Hormone Receptor ◽  
Growth Hormone Receptor ◽  
Allele Frequencies ◽  
Dual Purpose ◽  
Cattle Breeds ◽  
Dual Purpose Cattle

scholarly journals The Genomic Variation in the Aosta Cattle Breeds Raised in an Extensive Alpine Farming System

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2385
Author(s):  
Maria Giuseppina Strillacci ◽  
Mario Vevey ◽  
Veruska Blanchet ◽  
Roberto Mantovani ◽  
Cristina Sartori ◽  
...  
Keyword(s):  
Principal Component ◽  
Enrichment Analysis ◽  
Farming System ◽  
Genomic Variation ◽  
Dual Purpose ◽  
Cattle Breeds ◽  
Dual Purpose Cattle ◽  
Summer Pasture ◽  
The Mean ◽  
Genomic Inbreeding

The Aosta Red Pied (Valdostana Pezzata Rossa (VRP)), the Aosta Black Pied (Valdostana Pezzata Nera (VBP)) and the Aosta Chestnut (Valdostana Castana (CAS)) are dual-purpose cattle breeds (meat and milk), very well adapted to the harsh environmental conditions of alpine territories: their farming is in fact characterized by summer pasture at very high altitude. A total of 728 individuals were genotyped with the GeenSeek Genomic Profiler® (GGP) Bovine 150K Illumina SNP chip as a part of the DUALBREEDING-PSRN Italian-funded research project. The genetic diversity among populations showed that the three breeds are distinct populations based on the FST values, ADMIXTURE and Principal Component Analysis (PCA) results. Runs of Homozygosity (ROH) were obtained for the three populations to disclose recent autozygosity. The genomic inbreeding based on the ROH was calculated and coupled with information derived from the F (inbreeding coefficient) and FST parameters. The mean FROH values were low: CAS = 0.06, VBP = 0.05 and VRP = 0.07, while the average F values were −0.003, −0.01 and −0.003, respectively. The annotation and enrichment analysis, performed in the identified most frequent ROH (TOP_ROH), showed genes that can be linked to the resilience capacity of these populations to harsh environmental farming conditions, and to the peculiar characteristics searched for by farmers in each breed.

Sixty years of research on leadership in Africa: A review of the literature

Leadership ◽  
2015 ◽  
Vol 13 (2) ◽  
pp. 222-251 ◽  
Author(s):  
Willem Fourie ◽  
Suzanne C van der Merwe ◽  
Ben van der Merwe
Keyword(s):  
Large Body ◽  
Entry Point ◽  
The Other ◽  
Review Of The Literature ◽  
Dual Purpose ◽  
Historical Literature ◽  
Other Hand ◽  
Diachronic Analysis ◽  
The One

This paper reviews peer-reviewed research on leadership in Africa published from 1950 to 2009. The review has a dual purpose. On the one hand, it provides scholars with an entry point to the relatively large body of historical literature by means of a descriptive diachronic analysis of the literature. On the other hand, it also applies a synchronic analysis, and concludes with four interpretative statements on the scholarship on leadership in Africa. These statements are: (i) Scholarship on leadership in Africa has changed, and the change is lopsided; (ii) Female scholars are increasing, and they work on different themes from male scholars; (iii) Legitimacy remains a key issue, and continues to evolve; (iv) Authenticity has become a key issue and is now closely related to reclaiming African values.

Sign-Based Construction Grammar: A guided tour

2015 ◽  
Vol 52 (1) ◽  
pp. 194-217
Author(s):  
FRANK VAN EYNDE
Keyword(s):  
Case Studies ◽  
Phrase Structure ◽  
Construction Grammar ◽  
The Other ◽  
Phrase Structure Grammar ◽  
Diachronic Syntax ◽  
Other Hand ◽  
The One ◽  
Guided Tour ◽  
Further Development

Sign-Based Construction Grammar (sbcg) is, on the one hand, a formalized version of Berkeley Construction Grammar (bcg), and, on the other hand, a further development of constructionist Head-driven Phrase Structure Grammar (hpsg). The volume edited by Hans Boas and Ivan Sag is the first book length presentation of the framework. Its centerpiece is a 130-page synopsis of the theory by Ivan Sag. The other contributions to the volume provide background, justification, case studies, an extension to diachronic syntax and a presentation of the FrameNet Constructicon. This review gives a guided tour of the framework, explaining its central notions and assumptions, as well as the notation in which they are cast. It also compares the sbcg framework with other types of Construction Grammar and with hpsg. The case studies are summarized and briefly evaluated.

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