RESULTS OF GENETIC INFLUENCE ON GROWTH, DEVELOPMENT AND EGG PRODUCTIVITY OF LAYING HENS

УДК: 636.5.034.082 DOI: 10.31588/2413_4201_1883_4_260_34

Abstract

The aim of the study was to investigate and analyze comparatively the growth and development of young egg breeds of hens, as well as to evaluate the value of their subsequent egg productivity and morphometric indicators of eggs during the productive period, due to the genetic component. In the study a higher live weight and growth intensity in young brown crosses were revealed: at the age intervals of 7, 14 and 21 weeks' live weight of young cross Loman Brown- Classic was significantly higher than that in crosses Coral and Super Nick at the same age by 6.6- 16.7 %, in chickens of cross Brown Nick they were significantly higher than in white crosses - by 5.7-18.4 %. Hens of white crosses (Coral, Super Nick) had higher (by 1.3-3.2 %) egg production per average laying hen compared to brown crosses. Hens of Super Nick cross had higher egg productivity (312.8 eggs) per initial laying hen. Egg white and yolk indices showed high value in eggs of birds of Coral and Super Nick crosses – 12 and 12,1 %, due to significantly (P<0,01) higher height of dense egg white 9,4 mm and 9,5 mm, brown crosses were inferior in this indicator by 1,1- 1,4 %. The yolk index of eggs of laying hens of the analyzed crosses had no significant differences and varied between 47.8 and 48.7 %.