A chromosomal inversion contributes to divergence in multiple traits between deer mouse ecotypes

How locally adapted ecotypes are established and maintained within a species is a long-standing question in evolutionary biology. Using forest and prairie ecotypes of deer mice (Peromyscus maniculatus), we characterized the genetic basis of variation in two defining traits-tail length and coat color-and discovered a 41-megabase chromosomal inversion linked to both. The inversion frequency is 90% in the dark, long-tailed forest ecotype; decreases across a habitat transition; and is absent from the light, short-tailed prairie ecotype. We implicate divergent selection in maintaining the inversion at frequencies observed in the wild, despite high levels of gene flow, and explore fitness benefits that arise from suppressed recombination within the inversion. We uncover a key role for a large, previously uncharacterized inversion in the evolution and maintenance of classic mammalian ecotypes.

Community responsibility for the self-neglectful client

Self-neglectful clients, including the elderly, are in jeopardy, partly through their refusal to accept community services that could help them; they require protection from the community. These people are alienated and isolated, and need to be integrated into the community. Their individual rights to control their own lives, however, must be protected. It is the responsibility of the community to structure services in a way that will engage these people. A comprehensive community service program appropriate to their needs would integrate formal and informal care systems by interweaving professional services, informal assistance, and mutual aid within structures that facilitate coordination of formal care programs.