Content of mineral elements in yolk of hens selected for decreased content of yolk cholesterol

We evaluated the content of mineral elements in fresh egg yolk of hens selected for decreased concentration of yolk cholesterol. The content (concentration) of macroelements for both lines totally was with phosphorus 5.709 g/kg fresh yolk, calcium 1.165, sodium 0.623, magnesium 0.193, and with potassium 1.068 g/kg. The microelements were represented as follows: zinc 38.469 mg/kg fresh yolk, iron 61.17, copper 2.319, and manganese 0.996 mg/kg. The content of trace elements: cobalt 2.578 micro g/kg fresh yolk, chromium 10.14 micro g/kg. Differences between the selected lines were found in the content of mineral elements, they were statistically significant with calcium, phosphorus, iron, zinc and cobalt. Individuality of the layer influenced significantly to highly significantly the content of macro as well as micro and trace elements in yolk, namely in father as well as mother lines. The most marked efeect of the individuality of the layer was in the father line with the content of magnesium and copper. Very highly significant effect of the layer was also with the content of iron and manganese, highly significant effect with the content of sodium, and significant with the content of phosphorus. The effect of individuality of the layer was not significant with the content of yolk potassium, zinc and chromium. Very significant and positive correlation was between the content of yolk calcium and phosphorus, significant negative correlation was between the content of calcium and sodium, and calcium and iron. Very significant positive correlation was between the content of calcium and content of manganese. Significant correlation was between the content of phosphorus and iron, very significant negative correlation was between the content of magnesium and manganese. Significant positive correlation was between the content of potassium and copper, very significant positive correlation was between the content of iron and zinc, significant positive correlation was between iron and copper. Significant positive correlation was also between the content of yolk zinc and copper. Other correlations between the content of analysed elements in egg yolk were not significant