Table 1.
Basic external and internal indictors of egg quality of 10 hen breeds.
| ESC (N = 174) |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Breed | Day | N | EW (g) | L | A | B | ESI | ESS (kg/cm2) | EST (µm) | HU | YR (%) | YC |
| Hy-Line Brown | 421 | 45 | 67.0 ± 3.57a | 56.4 ± 3.18a | 19.9 ± 1.45a | 30.2 ± 1.18a | 1.33 ± 0.05ab | 4.87 ± 1.13a | 364.7 ± 19.3a | 75.1 ± 7.17a | 27.7 ± 2.86abc | 8.77 ± 0.82ab |
| Jinghong-1 | 450 | 45 | 63.3 ± 5.65bc | 63.6 ± 3.19b | 15.6 ± 2.44b | 27.5 ± 2.36b | 1.33 ± 0.04ab | 4.13 ± 0.67bc | 352.7 ± 25.2ab | 79.2 ± 8.18b | 26.0 ± 6.05a | 9.70 ± 0.84cd |
| Rhode Island Red | 450 | 45 | 68.2 ± 4.27d | 64.6 ± 4.88b | 15.1 ± 2.73b | 28.4 ± 3.34b | 1.33 ± 0.05ab | 4.01 ± 0.95c | 347.7 ± 29.8bc | 77.0 ± 4.91ab | 27.4 ± 2.59ab | 8.66 ± 0.94ab |
| Brown-Egg Dwarf layer | 421 | 45 | 61.4 ± 5.72c | 71.5 ± 6.21c | 11.5 ± 2.78c | 23.2 ± 3.41c | 1.36 ± 0.06cd | 3.03 ± 0.73d | 300.3 ± 23.7de | 77.0 ± 6.68ab | 30.9 ± 4.00d | 8.90 ± 1.03ab |
| Hy-Line Sonia | 462 | 45 | 63.2 ± 5.26bc | 81.6 ± 7.46d | 5.40 ± 1.96d | 18.0 ± 3.37d | 1.31 ± 0.05ab | 4.32 ± 0.93bc | 339.0 ± 19.0bc | 82.7 ± 6.19c | 29.1 ± 3.56bcd | 10.2 ± 0.79d |
| Jingfen-1 | 460 | 45 | 62.6 ± 4.66b | 85.0 ± 3.42e | 3.58 ± 2.13e | 16.2 ± 3.68e | 1.33 ± 0.04bc | 3.88 ± 0.82ce | 340.7 ± 33.4bc | 76.0 ± 6.92ab | 28.2 ± 3.82abc | 6.97 ± 0.72e |
| Taihang (Pink shelled) | 497 | 45 | 50.2 ± 4.36e | 86.4 ± 4.34f | 3.39 ± 2.72e | 13.9 ± 4.84f | 1.34 ± 0.07bc | 4.61 ± 1.29ab | 318.0 ± 29.4ef | 67.6 ± 7.44d | 35.6 ± 5.73e | 12.7 ± 0.99f |
| White Leghorn | 421 | 45 | 62.2 ± 4.80bc | 94.2 ± 0.83g | −0.46 ± 0.13f | 1.90 ± 1.15g | 1.31 ± 0.05a | 3.28 ± 0.95d | 310.3 ± 26.8de | 73.8 ± 6.63a | 30.0 ± 3.82cd | 8.47 ± 1.90a |
| Dongxiang | 421 | 45 | 47.2 ± 4.20f | 79.7 ± 4.20h | −5.72 ± 1.65g | 13.5 ± 3.40f | 1.38 ± 0.06d | 4.04 ± 1.04c | 304.8 ± 32.4de | 76.9 ± 7.76ab | 36.7 ± 4.91e | 9.47 ± 0.68cg |
| Taihang (Blue shelled) | 450 | 45 | 49.3 ± 5.49e | 84.4 ± 4.30e | −5.17 ± 2.70g | 11.9 ± 4.12h | 1.36 ± 0.07cd | 4.67 ± 0.55ab | 332.3 ± 33.0cf | 73.6 ± 7.84a | 30.9 ± 5.19d | 9.17 ± 1.12bg |
Abbreviations: EST, eggshell thickness; EW, egg weight; ESC, eggshell color; ESI, eggshell index, ratio of long diameter of eggshell to short diameter; ESS, eggshell strength; HU, Haugh unit; YR, yolk weight/egg weight × 100%; YC, yolk color.
L represents black to white, + is white, - is dark. A represents red to green, + is red, - is green. B represents yellow to blue, + is yellow, - is blue. L, A, B are average values of blunt, middle and sharp ends of eggshell.
a,b,c,d,e,f,g,h
Among 10 groups mean without a common superscript differ (P < 0.05).