The rate of weight gain and productivity of chicken broiler cross with various polymorphic types of myostatin gene

The search for single nucleotide polymorphisms (SNP) in the myostatin gene is a promising direction of research as this gene is involved in the development of important biological and productive traits in chicken. Using PCR-RFLP technique, an analysis of allele and genotype frequencies in Cornish chicken breed of G5 line of Smena-8 cross has been conducted. Two pairs of primers allowing PCR product to be obtained in the myostatin gene have been used. Two single nucleotide substitutions on exon 1 of the myostatin gene have been under investigation: G/A in MST2109 and G/С in MST2244. A signifiant predominance of deoxynucleotide G in MST2244 over C and deoxynucleotide A over G in MST2109 has been observed. Differences in productive traits between genotypes in MST2109 were not detected. Analysis of allelic variability by MST2244 locus showed statistically significant differences in live weight at the age of 7 days between CC and G2G2 genotypes (p < 0.01), CG2 and G2G2 (p < 0.05). G2G2 individuals (203.52 g) were significantly heavier than CC (179.5 g) and CG2 (193.95 g) chickens at the age of 7 days. Statistically significant differences between the CC and G2G2 genotypes in live weight at the age of 33 days have been revealed (p < 0.05). Thus, this research has led to a better understanding of allele frequencies in the myostatin gene in line G5 of Cornish breed. The results obtained will allow particular myostatin gene-based genotypes to be taken into account for accelerating the breeding process in the broiler poultry industry

Measurement of analysing powers for neutron scattering on CH2, CH, C and Cu target for momenta from 3.0 to 4.2 GeV/c

During two beam runs in the years 2016 and 2017, the analyzing powers (Ay) for protons and neutrons scattering on CH2, CH, C and Cu targets were measured at the nucleon momentum from 3.0 to 4.2 GeV/c with the ALPOM2 setup at the Nuclotron accelerator. The data for polarized neutron beam are obtained for the first time, thanks to the unique polarized deuteron beam that is presently available up to 13 GeV/c. Earlier, analyzing powers for polarized neutrons had been measured only for thin hydrogen targets. Cross sections and analyzing powers for np, for both elastic scattering and charge exchange are known up to 29 GeV/c. No data existed for thick analyzers. The measurement of the angular dependence of Ay for the neutron is essential to the continuation of the neutron form factor measurements to the highest possible transferred momentum-Q2 at the Jefferson Laboratory. The reaction p+Cu(W), with the detection of a neutron in the forward direction by a hadron calorimeter, can be used for the measurement of the proton polarization at the future NICA collider