Parallel Evolution of Bower-Building Behavior in Two Groups of Bowerbirds Suggested by Phylogenomics.

摘要: The bowerbirds in New Guinea and Australia include species that build the largest perhaps most elaborately decorated constructions outside of humans. males use these courtship bowers, along with their displays, to attract females. In species, mating system is polygynous females alone incubate feed nestlings. also 10 socially monogamous catbirds which male participates aspects raising young. How bower-building behavior evolved has remained poorly understood, as no comprehensive phylogeny exists for family. It been assumed catbird clade sister all species. We here test this hypothesis using a newly developed pipeline obtaining homologous alignments thousands exonic intronic regions from genomic data phylogeny. Our well-supported tree shows polygynous, are not monophyletic. result suggests either an ancestral condition family was secondarily lost catbirds, or it arisen parallel two lineages bowerbirds. favor latter based on character reconstruction showing polygyny but bowerbirds, observation Scenopoeetes dentirostris, one clades, does proper bower constructs court display. This sexually monomorphic plumage despite having system. argue relatively stable tropical subtropical forest environment combination low predator pressure rich food access (mostly fruit) facilitated evolution unique life-history traits. [Adaptive radiation; bowerbirds; system, sexual selection; whole genome sequencing.].