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Changes in External Egg Traits of Chickens during Pre- and Post-Molting Periods | ||
| Poultry Science Journal | ||
| مقاله 3، دوره 5، شماره 2، دی 2017، صفحه 91-95 اصل مقاله (351.45 K) | ||
| نوع مقاله: Original Paper | ||
| شناسه دیجیتال (DOI): 10.22069/psj.2017.12373.1234 | ||
| نویسندگان | ||
| SR Aziz1؛ A Shaker* 1؛ SMS Kirkuki2 | ||
| 1Animal production Department, Agricultural Research Center, Ministry of Agriculture and Water Recourses, Sulaimani, Iraq | ||
| 2Animal Production Department, Faculty of Agricultural Sciences, Sulaimani University, Sulaimani, Iraq | ||
| چکیده | ||
| 481 fresh fertilized eggs of three Kurdish local chickens (Black with brown neck, White with shank feathering, and White with non-feathering shank) were collected at pre-molting (355 eggs) and post-molting (126 eggs) stages to evaluate external egg traits. A venine caliper was used to determine the length and breadth of eggs to calculate Shape index. Results indicated that egg weight increased in all genetic groups (p < 0.05) at post-molting stage compared with pre-molting stage. There was a significant difference in egg length between pre- and post-molting periods from the black chicken with brown neck and white chicken with shank feather, but not from the white chicken with non-feathering shank. Also, egg breadth was similar between pre- and post-molting periods from black with brown neck and white with shank feather, but was different from white with non-feathering shank. Shape index was also similar between pre- and post-molting periods for white with shank feather, but were significantly different (P < 0.05) for black with brown neck and white with non-feathering shank. The results of this study indicate that egg external traits improved during post-molting period than pre-molting, and variations between egg layers for external traits could be due to the genetic makeup. | ||
| کلیدواژهها | ||
| Local chicken؛ Natural molting؛ Egg external trait | ||
| مراجع | ||
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