CZU 636.5 081/082

https://doi.org/10.61562/mgfa2023.21

INDICII CARACTERELOR MORFOPRODUCTIVE ȘI APLICAREA ACESTORA ÎN SELECȚIA PĂSĂRILOR
Lupolov Tatiana1, Petcu Igor2
e-mail: talupolova@gmail.com
1ORCID: https://orcid.org/0000-0003-4604-9267
2ORCID: https://orcid.org/0000-0002-2038-2048
Institutul Ştiinţifico-Practic de Biotehnologii în Zootehnie şi Medicină Veterinară
Abstract: The research paper presents the study of correlations between morpho productive characters in hens double productivity of Marans, Orpington, Gât golaș moldovenesc breeds and their intraracial hybrids. The link between body weight and Metatarsus length, the age of laying the first egg, and the number of eggs at 40 weeks were analyzed; as well as the correlation of the weight of the egg with the average body weight, the age of laying the first egg, and the number of eggs at 40 weeks were appreciated. Thus, both positive and negative correlations were established between different characters. The highest positive correlation proved to be between body weight and Metatarsus length, the obtained values being authentic for all 5 lots of chickens taken in the study (correlation coefficient is between 0,49 – 0,69). The values obtained between these two characters allow us the selection to be carried out in the direction of increasing flesh production, on the other, for the production of eggs, increasing the weight of the body will lead to a decrease in the number of eggs, including the decrease of the age of the laying first egg, and in particular, in the hybrid lots as ♀Marans × ♂ Gât golaş moldovenesc (r= -0,32±0.07) and ♀ Orpington × ♂ Gât golaş moldovenesc (r =-0,39±0,06). The selection work will also be complicated for other characters where negative correlations have been established, for example, increasing the weight of the egg will lead directly to a decrease in the age of laying the first egg and the number of eggs, which indicates practically the uselessness of selecting hens by this character, neither for egg production nor for meat production.
Keywords: correlation, productive indices, hens, selection