Morphological, anatomical and histological studies on knob and beak characters of six goose breeds from China

• DOI: 10.3389/fphys.2023.1241216
• Publication Date: 2023-08-28T11:40:32Z
• Authors: Yang Zhang; Xinlei Xu; Wangyang Ji; Shangzong Qi; Qiang Bao; Yong Zhang; Yu Zhang; Qi Xu; Guohong Chen
• Keywords: Beak; White (mutation)

The knob serves as both a sexual indicator of goose’s maturity and significant packaging attribute that garners consumer attention. However, studies regarding the morphological, anatomical histological traits different breeds ages on in goose are lacking. In this study, six with typical types were selected, their size, characterized. results showed that: Knob was more prominent gander than female goose, difference most obvious Magang goose. Wanxi white Shitou had largest bulge, while Sichuan smaller. total volume White significantly higher other breeds, regardless male or ( p < 0.05). beak Furthermore, observation revealed “knob” primarily consisted skin-derived tissue bony protrusions. As age advances, geese undergoes synchronous development, typically surpassing counterparts during same period. growth rate fastest from 70 to 120 days age, slowed down 300 500 age. slower There essential differences composition Yangzhou knob. subcutaneous rich, thickness epidermis, dermis various layers smaller With knob, cells epidermal spinous layer became denser gradually condensed into an overall structure, there clear boundary between epidermis after adult. adulthood, fiber fascicle network staggered dense, greater toughness elasticity, stratum corneum, reticular layer, skin structural thicker.