The recent increase in genomic data is revealing an unexpected perspective of gene loss as a pervasive source of genetic variation that can cause adaptive phenotypic diversity. This novel perspective of gene loss is raising new fundamental questions. How relevant has gene loss been in the divergence of phyla? How do genes change from being essential to dispensable and finally to being lost? Is gene loss mostly neutral, or can it be an effective way of adaptation? These questions are addressed, and insights are discussed from genomic studies of gene loss in populations and their relevance in evolutionary biology and biomedicine.
At a glance
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- Supplementary information S1 (table) (105 KB)
Examples of gene losses associated to parasitic/endosymbiontic life styles
- Supplementary information S2 (table) (121 KB)
Examples of gene losses in animals concomitant with the evolution of new biological features
- Supplementary information S3 (box) (81 KB)