Black-bone chicken breeding method
A black-bone chicken and selection index technology, applied in the field of poultry breeding, can solve the problems of inaccurate measurement results and high subjectivity, and achieve the effects of improving the degree of refinement, easy promotion, and improving breeding efficiency
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Embodiment 1
[0035]In this example, 40 105-day-old silky chickens from Jiangsu Lihua Animal Husbandry Co., Ltd. were selected to carry out the slaughter determination of the skin and muscle chromaticity indicators (in order to facilitate understanding and calculation, the original experimental scale was reduced from 300 to 40 Only). The model of the colorimeter used is 3NH-NR110 from Sanenchi Company.
[0036] 1. Instrument and sample preparation: Prepare the 3NH-NR110 colorimeter, and slaughter 40 silky chickens.
[0037] 2. Expose the site to be measured: expose the skin on the right shoulder of the chicken, separate the skin on the right chest, and expose the pectoral muscle.
[0038] 3. Chromaticity index measurement:
[0039] (1) Turn on the power supply, push the power switch to the I position;
[0040] (2) Press the menu key and select "Standard Sample Measurement";
[0041] (3) Press the measurement key to randomly select a chicken shoulder skin for measurement;
[0042] (4) P...
Embodiment 2
[0082] This embodiment selects 50 70-day-old ordinary feather silky chickens of Jiangsu Lihua Animal Husbandry Co., Ltd. to carry out the slaughter determination of skin and muscle chromaticity indexes. Use instrument and equipment with embodiment 1.
[0083] Steps 1 to 4 are the same as in Example 1, measuring phenotypic data (see Table 4),
[0084] Table 4 Chromaticity index values of shoulder and chest of 40 silky chickens
[0085]
[0086]
[0087] Get the regression equation of chest muscle color to skin color:
[0088] P L =39.405+0.013*S L (2-1)
[0089] P a =0.242+0.221*S a (2-2)
[0090] P b =-1.433+0.970*S b (2-3)
[0091] Step 5 is the same as in Example 1, calculating the combined selection index of individuals with extreme phenotypes:
[0092] (1) Select 20 individuals with the "darkest" and the "lightest" skin color and flesh color respectively (see Table 5);
[0093]Table 5 Measured value of chromaticity index in extreme groups of darkest ...
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