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Study of the Deposition Process of Eggshell Pigments Using an Improved Dissolution Method

X.-T. Wang^*,1, X.-M. Deng^*,1, C.-J. Zhao^*, J.-Y. Li^*, G.-Y. Xu^*, L.-S. Lian^*, and C.-X. Wu^*,2

^* State Key Laboratory of Agrobiotechnology and the Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, China Agricultural University, Beijing, 100094, China; and College of Animal Science and Technology, Yunnan Agricultural University, Kunming, 650201, China

² Corresponding author: chxwu{at}public.bta.net.cn

An improved dissolution method called layer-by-layer dissolution was adopted to study the process of eggshell deposition, which is opposite to the process of eggshell dissolution. In the present study, blue and brown eggshells from 2 Chinese indigenous chicken breeds, Dongxing and Shouguang, respectively, were analyzed with layer-by-layer dissolution. The results showed that the deposition velocity of the eggshell pigments in the top (first) eggshell layer was the highest compared with other layers, which were biliverdin and protoporphyrin in blue eggshell or primarily protoporphyrin in brown eggshell. It was also revealed that the deposition processes of biliverdin and protoporphyrin were synchronous in the blue eggshell of the Dongxiang chicken in the present study.

Key Words: chicken • eggshell color • protoporphyrin • biliverdin

¹ These authors contributed equally to this work.

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				X. T. Wang, C. J. Zhao, J. Y. Li, G. Y. Xu, L. S. Lian, C. X. Wu, and X. M. Deng Comparison of the total amount of eggshell pigments in Dongxiang brown-shelled eggs and Dongxiang blue-shelled eggs Poult. Sci., August 1, 2009; 88(8): 1735 - 1739. [Abstract] [Full Text] [PDF]