Identification of crucial genes and metabolites regulating the eggshell brownness in chicken

Jing Yang, Zhiqiong Mao, Xiqiong Wang, Jingjie Zhuang, Sijia Gong, Zhouyang Gao, Guiyun Xu, Ning Yang & Congjiao Sun
Abstract Background Protoporphyrin IX (Pp IX) is the primary pigment for brown eggshells. However, the regulatory mechanisms directing Pp IX synthesis, transport, and genetic regulation during eggshell calcification in chickens remain obscure. In this study, we investigated the mechanism of brown eggshell formation at different times following oviposition, using White Leghorn hens (WS group), Rhode Island Red light brown eggshell line hens (LBS group) and Rhode Island Red dark brown eggshell line hens (DBS group)....
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