Rapid and unpredictable changes of the G-matrix in a natural bird population over 25 years.

摘要: Knowledge of the genetic variances and covariances traits (the G-matrix) is fundamental for understanding evolutionary dynamics populations. Despite its essential importance in studies, empirical tests temporal stability G-matrix natural populations are few. We used a 25-year-long individual-based field study on almost 7000 breeding attempts collared flycatcher (Ficedula albicollis) to estimate over time. Using animal models G several time periods, we show that structure time-specific G-matrices changed significantly The changes were unpredictable, at one period was not indicative next period. Moreover, related mean trait values or due drift. Selection, differences acquisition/allocation patterns environment-dependent allelic effects therefore likely explanations observed, probably combination. Our result cautions against assuming constancy indicates even short-term predictions can be very challenging.