Genetic background of experimental animals contributes mainly to the variations in the experimental outcomes. Therefore, quails of two lines of plumage color (brown and recessive white) were studied to investigate the impact of plumage color mutations on the morphological structures of the oropharyngeal roof and also on the ingestive behavior and quail performance. Feeding intake and feed conversion ratio were higher in the brown quails, associated with nonsignificant increase of the live body weight and body weight gain. In the recessive white quails, ingestive behaviors revealed significant declines. The roof of the oropharynx roof was significantly longer in the recessive white quails; however, the upper beak was significantly longer and narrower in the brown ones. The length of the palate and pharynx showed nonsignificant increase in the recessive white quails. The median palatine ridge was formed of rostral continuous and caudal interrupted parts, and the lengths of these parts were slightly higher in the recessive white quails, meanwhile the lateral palatine ridge length showed a slight increase in the brown birds. Openings of intraepithelial glands were more numerous in the recessive white quails. The brown quails demonstrated more detectable and larger caudally directed conical shaped palatine and pharyngeal papillae, in addition to more considerable palatine salivary glands openings. The infundibular cleft was significantly wider in the recessive white quails, where its edges were characterized by lack of the pharyngeal papillae. The findings of this study will be beneficial for the breeders during selection the suitable quail lines for meat production purposes.

中文翻译：

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日本鹌鹑（Coturnix coturnix japonica）的隐性白色羽毛颜色突变揭示了口咽屋顶结构的形态变化，伴随着行为差异

实验动物的遗传背景主要影响实验结果的变化。因此，研究了两种羽毛颜色（棕色和隐性白色）的鹌鹑，以研究羽毛颜色突变对口咽顶形态结构以及摄食行为和鹌鹑性能的影响。褐鹌鹑的采食量和饲料转化率较高，与活体重和体重增加不显着增加有关。在隐性白鹌鹑中，摄食行为显着下降。隐性白鹌鹑的口咽顶明显较长；然而，棕色的上喙明显更长更窄。隐性白鹌鹑的上颚和咽部的长度没有显着增加。中腭脊由喙侧连续部分和尾侧间断部分组成，这些部分的长度在隐性白鹌鹑中略高，而在棕色鸟类中，侧腭脊长度略有增加。隐性白鹌鹑的上皮内腺体开口较多。除了更明显的腭唾液腺开口外，棕色鹌鹑表现出更可检测和更大的尾端锥形腭和咽乳头。隐性白鹌鹑的漏斗裂口明显更宽，其边缘的特征是缺乏咽乳头。