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Some Variable Traits of Broiler Genotypes
25-30Views:132One the most effective ways to satisfy the requirements of mankind for food of animal origin is the fattening of chicken. Healthy and cheap meat with low fat and high protein content can be produced rapidly and in large quantities by broilers with low feed consumption. This paper presents the production results and carcass traits of three genotypes (Ross 308, Cobb 500, Ross broiler parent) females and males at the age of 42 days.
In both sexes, we found that the average body weight of the Ross parents genotype was higher (females: 2643 g; males: 3089 g) than the
average body weight of the other two hybrids – significant difference was found only between pullets. However, the smallest difference in the
average body weight between the two sexes (446 g) was found in this genotype. In both sexes, the lowest average weight was detectable in
the case of the Cobb 500 hybrids (females: 2443 g; males: 3052 g).The feed consumption ability of the females were worse – in all but one
case (Ross pullet) – than that of the males. For one kg of weight gain - in the order of genotypes – 1.79kg, 2.08kg and 2.08 kg of feed was
used. The same values for the males were as follows: 1.81kg, 1.80kg and 1.89 kg, respectively.
Carcass traits were examined and it was found that the average grillfertig weight, the weight of whole thigh meat and thigh meat of the
Ross parents’ genotype was higher than the average weight of the other two hybrids. Significant difference was found only in grillfertig- and
whole thigh meat weight. Pullets of the Ross parents’ paternal line had worse results in the average weight of breast meat with bone and
breast meat fillet than the other two genotypes. In the case of cocks was detectable the inverse of this: the average weight of breast meat with
bone was the highest in the cocks of the Ross parents’ maternal line. -
Inner pelvic measurements in dairy breeds
51-56Views:108Dystocia causes great financial losses: due to dystocia milk production is decreased and the probability of calf loss is increased. There are many factors that may cause dystocia. One of the factors –often investigated in beef cattle- is pelvic measurements. There have not been inner pelvic measurement comparisons in dairy breeds in Hungary.
After comparing the imported, primiparous cows, Jersey turned out to have the smallest absolute inner pelvic measures. According to their age and weight, Brown Swiss cows had the largest pelvic dimensions. Ayrshires, Norwegian and Swedish Red, the three dairy breeds which share similar genetic background did not differ in most measures. Holsteins were closest to the seemingly ideal 1:1 horizontal and vertical diameter ratio; however this breed suffers the most from dystocia. Jerseys, despite having the smallest pelvic area are famous of their calving ease, perhaps not by coincidence. Though this dairy breed is the lightest, when pelvic area was compared in ratio of body weight Jerseys were not smaller than the 130 and 114 kg heavier Norwegian and Swedish Red cows. -
Inner pelvic measurements in dairy breeds
31-35Views:97Dystocia causes great financial losses: due to dystocia milk production is decreased and the probability of calf loss is increased. There are many factors that may cause dystocia. One of the factors –often investigated in beef cattle- is pelvic measurements. There have not been inner pelvic measurement comparisons done on dairy breeds in Hungary.
After comparing the imported, primiparous cows, Jerseys turned out to have the smallest absolute inner pelvic measures. According to their age and weight, Brown Swiss cows had the largest pelvic dimensions. Ayrshire, Norwegian and Swedish Red, the three dairy breeds which share similar genetic background did not differ in most measures. Holsteins were closest to the apparent ideal 1:1 horizontal and vertical diameter ratio; however, this breed suffers the most from dystocia. Jerseys, despite having the smallest pelvic area are famous of their calving ease, perhaps not by coincidence. Although this dairy breed is the lightest, when the pelvic area was compared in ratio of body weight Jerseys were not smaller than the 130 and 114 kg heavier Norwegian and Swedish Red cows. -
Macro element contents of different genotype cows’ milk
27-31Views:104The level of mineral elements is important factor regarding the quality of milk. The aim of our research study was to determine the content of mineral elements in milk of Holstein, Jersey, Brown Swiss, Ayrshire, Norwegian-red, Swedish-red cows in the first stage of lactation. All cows were fed with the same type (composition) of feed and they were kept under the same condition. The concentration of macroelements (K, Na, Ca, P, Mg, S) in digested milk samples was determined by inductively coupled plasma optical emission spectrometry (ICP-OES).
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Organoleptical and instrumental examination of broilers’ valuable meat-parts
37-41Views:139The aim of our study was to compare some meat quality parameters (color,- evenness of colour- and tone of meat) of Ross 308, Cobb 500 and
Ross parents hibrids. These qualities are of preliminary importance for consumers and are related to several evaluating features influencing the preparation. The colour of the breast and thigh muscles was measured by Minolta CR-300 type colour measuring equipment. The evenness of color- and tone of the breast and thigh muscles were measured in the laboratory of Campden BRI Magyarország Nonprofit Kft.
We found that in the females the color of Ross 308 pullets’ breast meat was significantly darker. In the males the darkest breast meat was detectable in the case of the Ross parents hybrids. In neither sexes wast found significant difference – in all but one – in quality parameters of thigh meat.