The authors state:
Here, we report the first genome sequence and comparative analysis of peacock with the high quality genomes of chicken, turkey, duck, flycatcher and zebra finch. Genes involved in early developmental pathways including TGF-β, BMP, and Wnt signaling, which have been shown to be involved in feather patterning, bone morphogenesis, and skeletal muscle development, revealed signs of adaptive evolution and provided useful clues on the phenotypes of peacock. Innate and adaptive immune genes involved in complement system and T-cell response also showed signs of adaptive evolution in peacock suggesting their possible role in building a robust immune system which is consistent with the predictions of the Hamilton–Zuk hypothesis. This study provides novel genomic and evolutionary insights into the molecular understanding toward the phenotypic evolution of Indian peacock.
I thought these findings were of particular interest:
The most significant results emerged from the adaptive sequence divergence analysis, where a major fraction of genes involved in early development and immune system showed multiple signs of adaptive evolution (Figure 4). Similarly, the genes involved in the early development of feathers showed signs of adaptive evolution in the feather-specific gene set. In addition, the adaptive divergence observed in the genes involved in bone morphogenesis and skeletal muscle development perhaps explain the large body dimensions, stronger legs and spurs, and the ability to take short flights despite of a long train. Taken together, the evolution in the early development genes emerges as a prominent factor for explaining the molecular basis of the phenotypic evolution for Indian peacock.
Science. Real science.
Edited 1 time(s). Last edit at 20-Apr-19 08:41 by eyeofhorus33.