ASSOCIATION OF COMPLEX GENOTYPES OF DGAT1, CSN3, LGB GENES WITH ECONOMICALLY VALUABLE SIGNS OF BIRD BULLS

Using DNA analysis among the complex genotypes of the DGAT1, CSN3 and LGB genes, it was revealed that 14 different complex genotypes were identified in 63 animals and the highest productivity indices belong to animals with a combination of DGAT1AK CSN3BB LGBBB genotypes – 9261.5 kg and 3.7 % fat and 4,2 % protein. They account for 1.6 % of those studied. Also, cows - mothers with the same combination of genotypes have a high yield of fat and protein – 342.6 kg and 388.9 kg

Site productivity indices for native forests in southeast Queensland

Site productivity, or site quality, describes the potential biomass growth and yield of vegetation at a given location. Land managers have devised indices for site productivity using attributes related to plant yields or growth rates, and these have great utility when available spatially in maps. The main factors determining site productivity include climate, soil and terrain characteristics. Here we analysed four productivity indices (two based on remote sensing only, two based on modelling and algorithms using spatial datasets). The tested indices were available over a 150,000 km2 area of southeast Queensland Australia, a region dominated by Eucalyptus and Acacia species. We were interested in comparing the indices regarding underlying drivers, effects on vegetation types and the general distribution of site productivity across our study region. Our methods included histograms of spatial attribute intersection, and multivariate linear regression. Remote sensing has clear advantages in capturing current conditions, which potential productivity algorithms cannot depict. On the other hand, maps with productivity algorithms provide large-scale robust information on biomass growth/yield that is sensitive to the main drivers of plant growth (e.g. climate, soil).

The Economics of Rabbit Farming: A Pilot Study on the Impact of Different Housing Systems

This research evaluates the economic sustainability of rabbit farms using different housing systems—bicellular (BI), conventional dual-purpose (DP) and enriched cages designed according to the World Rabbit Science Association guidelines (WRSA)—through a field-based study involving six farms over the course of five years. The cages were compared based on three productivity indices expressed in kg of produced live weight/m2 and on eight cost indices expressed in EUR/kg of produced live weight. The results showed that WRSA significantly reduced the productivity index per walkable cage area in buildings and cages, thanks to the longer platform area included in the cage compared to the other systems. Concerning cost indexes, total variable costs were not different among housing systems, whereas significant differences were observed within costs items. As for the feed costs, DP underperforms compared to BI or WRSA (1.15 vs. 1.02 and 0.99 EUR/kg produced live weight); for drugs costs, BI was less competitive compared to DP and WRSA (0.12 vs. 0.06 and 0.05 EUR /kg). In conclusion, under the conditions of the present study, the economic results of farms that adopted housing systems designed to improve rabbit welfare, such as WRSA enriched systems, were economically sustainable and, comparable to conventional housing systems based on BI or DP cages, also provided a significant reduction in drug use in the tested farms. A comprehensive collection of data from more farms at a European level would be necessary to confirm these results on the economics of farms adopting alternative housing systems for rabbits.

Analiza diferitor hibrizi de perspectivă în sectoarele comparative

Sunflower (Helianthus annuus L.) holds a prominent place in global agriculture as one of the most important crops from economical and alimentary aspect and is highly demanded both on domestic and international markets. Current study focuses on the analysis of morphological and productivity characteristics for a number of sunflower hybrids obtained in AMG-Agroselect Comerts SRL breeding programs. The values for the main biometric parameters were analyzed. Evaluation of the productivity indices demonstrates lower values in 2020 for most parameters of produc-tivity compared to 2019, specific climatic conditions of the mentioned year explain this fact. ‘Nistru’ hybrid in 2019 showed the best performance in four cases (leaf number, capitulum diameter, seed weight per capitulum and TKW). ‘Zimbru’ hybrid showed minimal values in five cases (plant height, ca-pitulum diameter, seed weight per capitulum, seed number per capitulum and TKW).

National Curricular Parameters for Mathematics: From the Creation of the Kaleidoscope to the Necessity to Look Back to Move Forward

Background: In the last decades in Brazil, the prescriptions of the official curricular documents of school mathematics have been constituted as a practice of successive governments. However, there is still little research on the participation of mathematics teachers and educators in the construction of these prescriptions. Objective: To present the perspective of the research collaborator in the general coordination of the PCNs (National Curriculum Parameters) in the area of Mathematics (3rd and 4th cycles of elementary education). Design: This is a qualitative research, with the production of a documentary source through interviews with thematic oral history procedures. Setting and participants: The research collaborator was professor Dr. Célia Maria Carolino Pires, and the interviews were conducted at her residence. Data collection and analysis: Oral sources were used, in the form of interviews with a researcher in the field of mathematics education, as well as written sources that complemented the necessary information. Results: This article presents a thematic section that, on the one hand, makes public the opinions of a person who actively participated in the elaboration and diffusion of the PCNs; and, on the other hand, it invites us to reflect on how - in the last 50 years in Brazil - primary school teachers have had the opportunity to be supporting/protagonists in terms of curriculum production, and how this production has been conducted and understood as a government policy (and political parties) and not a State policy. Conclusions: The article presents considerations made by a participant engaged in the process of elaborating and disseminating the Mathematics PCNs for the 3rd and 4th cycles of elementary education and - in addition - it was constructed to promote a reflection on more recent themes that include, for example, to think about how external assessments start to induce the production of curricula, functioning as thermometers that supposedly can capture the productivity indices of the school system and, at the same time, promote more symptoms of the illness they intend just to “gauge”

Análisis bibliométrico sobre heladas en cultivos y su relación con las soluciones generadas de diferentes investigaciones

Se analizaron un total de 40 artículos de investigación sobre el fenómeno de las heladas, afectaciones que tienen las heladas, sistemas de riego y soluciones y/o estrategias que se pueden encontrar hoy en día para minimizar el daño causado por este fenómeno durante el periodo comprendido entre 2001 a 2021, las bases de datos utilizadas fueron Science Direct y Scopus, de igual forma se encontraron artículos en repositorios de universidades a nivel nacional y asimismo en Google Scholar. En el análisis se incluyen las palabras clave, el año de publicación, enfoque, países, número de citas y número de autores. El número de publicaciones presentó un incremento durante los últimos años. Los resultados indicaron que “frost”, “frost problem”, “irrigation systems”, “frost solutions” fueron los términos en los cuales se hizo más frecuente en los títulos de las publicaciones, mediante el uso de los índices bibliométricos de productividad se encontró que el índice de colaboración más alto fue en los años de 2015 y 2019, durante los años de 2001, 2005, 2007 se presentó el índice Price más alto. La universidad Santo Tomás fue la institución más productiva en cuanto a desarrollo de investigación referentes a los temas, de igual forma a nivel nacional, otras universidades tuvieron un porcentaje de publicaciones con los temas relacionados, lo que indica que a nivel nacional este tema ha venido tomando mucha fuerza con relación a las variaciones climáticas que se presentan hoy en día. Los países con más números de publicaciones encontrados fueron Colombia, Brasil, Estados Unidos. Con relación a los idiomas encontrados por las publicaciones, se encontró un total de 42,5% en español, un 40% en inglés y un 17,5% en portugués. A total of 40 research articles were analyzed on the phenomenon of frost, effects of frost, irrigation systems and solutions and/or strategies that can be found today to minimize the damage caused by this phenomenon during the period from 2001 to 2021, the databases used were Science Direct and Scopus, Articles were also found in national university repositories and in Google Scholar. The analysis includes keywords, year of publication, focus, countries, number of citations and number of authors. The number of publications has increased in recent years. The results indicated that "frost", "frost problem", "irrigation systems", "frost solutions" were the terms in which it became more frequent in the titles of the publications, using bibliometric productivity indices found that the highest collaboration index was in 2015 and 2019, during the years 2001, 2005, 2007 the highest Price index was presented. The Santo Tomás University was the most productive institution in terms of research development related to the topics, similarly at the national level, other universities had a percentage of publications with related topics, this indicates that at the national level this theme has been gaining a lot of strength in relation to the climatic variations that are presented today. The countries with the greatest number of publications found were Colombia, Brazil, United States. Regarding the languages found in the publications, a total of 42.5% were found in Spanish, 40% in English and 17.5% in Portuguese.

AGRICULTURAL EFFICIENCY AND ITS COMPONENTS IN EUROPEAN UNION COUNTRIES BETWEEN 2009-2019. ANALYSIS USING AGGREGATE FÄRE-PRIMONT PRODUCTIVITY INDICES

The aim of the research was to measure the efficiency of agricultural activities in European Union countries with the use of various measures of efficiency. The analysis covered the years 2009-2019. The calculated efficiency was relative and the starting material for its estimation were aggregated Färe-Primont productivity indices. Based on the maximum possible level of productivity in a given period, the level of relative efficiency of TFPE was estimated. The analysed countries were grouped, on the basis of this efficiency, into four groups differentiated in terms of level. Then, the TFPE index was decomposed into several separate measures of efficiency, which were further analysed. The analysis showed that there are differences in the level of efficiency between individual countries. It has been shown that agriculture in European Union countries can be considered technically efficient. The efficiency of scale is also high. The greatest variation between countries is in the case of residual efficiency.