Evolution of Phenotype and Mitochondrial Genome Reveals Limbless and Body-elongated Squa mates may Change Their Energy Basis for Locomotion

• 作者: Zeng WANG Wei WU Jinlong REN Changjun PENG Dechun JIANG Jiatang LI
• 来源期刊: 亚洲两栖爬行动物研究（英文版）
• 年，卷（期）: 2021,（2）
• 页码范围: 213-220,中插19-中插30
• 页数: 1页
• 语种: 英文
• DOI: 10.16373/j.cnki.ahr.200134

摘要

Limb reduction in Squamata present the dramatic characteristic to focus and usually accompanied with particularly morphological modifications, impacting tremendous locomotion changing and might generate different energy requirement. Herein, we combined both morphological and mitochondrial genomic data to explore the evolution of phenotypic transformation and mitochondrial genome of limbless and body-elongated squamates. We collected phenotypic measurements of 503 individuals, representing limbed or limbless taxa across all major lineages in Squamata to investigate the morphological correlations with limb-reduction. Furthermore, we provided the mitochondrial genome of the representative limbless and elongated species Dibamus bourreti (Angel, 1935) to detect selective constraints on limbless clades with published mitogenomes of other squama te reptiles. Our results evidenced that body elongation had certain negative relationship with limb-reduction in Squamata lineage and Lacertilia lineage (R= -0.495, P ＜ 2.2e-16; R= -0.332, P = 1.1e-13, respectively), while tail length showed slight correlation in both clades (R = 0.156, P = 4.3e-04; R= 0.192, P = 2.1e-05, respectively). Besides, detection demonstra ted that AT P6 has experienced accelerated evolution among limbless lineages, suggesting selective pressure on mitogenomes may play an essential role in energy disparity for locomotion of limbed and limbless squamates.