THE DEPENDENCE OF THE HATCHABILITY, LAYING, AND EGG WEIGHT ON THE EGGCHOLESTEROL LEVEL AND CHOLESTEROL AND TOTAL LIPIDS CONCENTRATION IN THE BLOOD-PLASMA IN HENS OF LAYING STRAINS

The content of yolk cholesterol significantly fluctuated in the RIR, R IW and BPR lines, i.e. from 215.46 to 298.12 mg, the concentration of cholesterol in plasma ranged between 3.70 and 4.99 mmol/l, and of the total lipids between 17.88 g/l and 29.96 g/l. The correlation between the concentrations and content of yolk cholesterol and egg laying was significantly negative (i.e. r(p) = -0.20 to -0.31 and r(p) = -0.25 to -0.43); between yolk cholesterol and egg weight it was positive (i.e. r(p) = 0.08 to 0. 36); between hatchability and the concentration and level of yolk cholesterol mostly negative (i.e. r(p) = -0.26 to 0.02) ; between the concentration and content of yolk cholesterol and plasma cholesterol mostly positive (i.e. r(p) = -0.04 to 0.28), the same as between the total lipids in plasma and egg laying (i.e. r(p) = -0.08 t o 0.29); on the contrary, between hatchability and plasma cholesterol and total lipids mostly negative (i.e. ranging from r(p) = -0.25 to 0. 09). In terms of the possibilities of the present selection the found relationships were found to be determined by the line of the hen and t he intensity of performance.