Circuit reliability has become a major bottleneck due to ageing degradation.
This covers a broad range of bottleneck strengths and ages.
Even very large samples are expected to coalesce to two lineages within 2 N e generations (Tajima 1983; Nordborg 1998), suggesting that there is little information to infer bottlenecks approaching this age or older (as we find, Figure 3) and that larger samples of individuals add only information about recent bottlenecks (see also Terhorst and Song 2015).
One-hundred samples were simulated for each combination of bottleneck size, duration and age, and the 95% upper quantile was computed for all statistics for each combination of parameters.
Indeed, one of the more intriguing outcomes of their analysis are the new estimates for the age of bottlenecks, with an initial domestication placed as modally 8200 BP, and the indica bottleneck at 3900 BP.
Silicon photonics aims to solve what has become one of the huge bottlenecks in the information age, the movement of data in and out of computers.
Various factors such as the total number of founders, number and intensity of bottlenecks, levels of endogamy, age and duration of isolation shape the demographic history of isolates.
The estimated age of the bottleneck in clade A is more recent than that of grade B (Table 2), reflecting the more recent divergence of clade A in the estimated phylogeny.
The estimated age of the bottleneck for the pair of clades, 2.30 My, predates the estimated divergence time of all extant L. boeticus 1.5 Mya (Fig. 2B), suggesting methodological discrepancy between the methods used to date divergence times and those used to estimate time since expansion.
It is possible that the mutation leading to the studied variant took place earlier and the estimate of nine generations ago is in fact the age estimate of a population bottleneck that occurred in the population.
