Correlation variability between live weight and weight of the incubation egg and body measurements of Obroshynska gray and Obroshynska white natural groups geese
Abstract
This article shows data analysis of the correlation between the live weight of Obroshynska gray and Obroshynska white natural groups geese and the weight of the incubation egg, beside this the age repeatability of the live weight of the poultry has been investigated and the correlation variability of the aforementioned indicators and body measurements of the females and males of geese breeds have been analyzed. It was established that the most significant and highly reliable correlation bundles were between live weight and the weight of the incubation egg were detected in one day aged geese. In another researched age periods, these connections were sharply weakened and at 60-day aged geese reached the minimum values and were inconceivable. With the increase of the interval between the comparable age periods and the coefficients of repeatability of live weight were declined. In Obroshinsky gray natural group geese females – the coefficients of repeatability of live weight were depending on age and they ranged from 0.01 to 0.55, in males – from 0.01 to 0.57, and in the bird of the Obroshinsky white natural group geese were from 0,03 to 0.53, and from 0.02 to 0.65 respectively. In 30 to 60 days of aged geese of both sexes of both natural groups the coefficients of repetition of live weight were the highest and reached more than 50% at their high level. This indicates that live weight of geese selection can be carried out already at 30-day aged geese. The highest coefficients of the correlation in the birds of both geese natural groups were observed in all studied age periods between the live weight and the width of the pelvis, the length of the trunk, the length of the keel and the chest covering of the shoulder blades: in females they were within the range of 0.58–0.96, and in males – in the range 0.50–0.96 at P < 0.001 in all cases. However, it should be noted that the correlation of live weight, the length of the body and the length of the keel in both sexes geese from Obroshinsky gray natural group were more significant than in geese from Obroshinsky white natural group, but the correlation bonds between the living weight with the width of the pelvis and the chest covering of the shoulder blades on the contrary, were weaker. The weakest correlation were detected between the live weight and the length of the mold, leg and thigh in the poultry of both sexes of both groups in the 30–60 days aged geese.
Keywords
