共查询到20条相似文献,搜索用时 15 毫秒
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Keeling L Andersson L Schütz KE Kerje S Fredriksson R Carlborg O Cornwallis CK Pizzari T Jensen P 《Nature》2004,431(7009):645-646
Feather-pecking in domestic birds is associated with cannibalism and severe welfare problems. It is a dramatic example of a spiteful behaviour in which the victim's fitness is reduced for no immediate direct benefit to the perpetrator and its evolution is unexplained. Here we show that the plumage pigmentation of a chicken may predispose it to become a victim: birds suffer more drastic feather-pecking when the colour of their plumage is due to the expression of a wild recessive allele at PMEL17, a gene that controls plumage melanization, and when these birds are relatively common in a flock. These findings, obtained using an intercross between a domestic fowl and its wild ancestor, have implications for the welfare of domestic species and offer insight into the genetic changes associated with the evolution of feather-pecking during the early stages of domestication. 相似文献
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Functional genomics: RNA sets the standard 总被引:9,自引:0,他引:9
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Comparative genomics: the mouse that roared 总被引:7,自引:0,他引:7
Boguski MS 《Nature》2002,420(6915):515-516
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Cancer and genomics 总被引:6,自引:0,他引:6
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Positive selection at the molecular level is usually indicated by an increase in the ratio of non-synonymous to synonymous substitutions (dN/dS) in comparative data. However, Plotkin et al. describe a new method for detecting positive selection based on a single nucleotide sequence. We show here that this method is particularly sensitive to assumptions regarding the underlying mutational processes and does not provide a reliable way to identify positive selection. 相似文献
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Comparative genomics: Insecticide resistance in mosquito vectors 总被引:8,自引:0,他引:8
Weill M Lutfalla G Mogensen K Chandre F Berthomieu A Berticat C Pasteur N Philips A Fort P Raymond M 《Nature》2003,423(6936):136-137
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Cancer genomics: small RNAs with big impacts 总被引:1,自引:0,他引:1
Meltzer PS 《Nature》2005,435(7043):745-746