The phrase "ancestral generation" is grammatically correct and can be used in written English.
You can use it to refer to a specific generation of ancestors in a family lineage. For example: "My great-great-grandfather was part of the ancestral generation that first immigrated to America from Ireland." "In this film, we explore the lives of our ancestral generation and the struggles they faced during the war." "The traditions and customs of our ancestral generation have been passed down for centuries."
Ancestral generation times were inferred using the approach described in Schrago (2014).
Figure 3 shows that the contribution to the variation of Fped decreases log-linearly as a function of the contributing ancestral generation.
Transformation of scaled effective population sizes into absolute number of individuals requires estimates of ancestral generation times and the yearly evolutionary rate.
Given that the contribution to Fped at generation t is independent of the contribution to Fped from previous generations, the variation of Fped for a given population size can be apportioned into the amount contributed by each ancestral generation.
In the ancestral generation, the survival rate of dioecious lineages was ∼0.6 after inbreeding (inbreeding coefficients of f t ≈1), corresponding to a 2.5-fold increase in the probability of extinction over that of the androdioecious populations (LK ratio test=72.1, log10 P=−7.23, n=255).
Although we had no way of measuring the proportion of variation in genomic estimates of F that was due to each ancestral generation, our results below demonstrate that genomic estimates of F retain considerable variation in large populations after variation in Fped has diminished to ∼0.
The pedigree file was extracted from the database used for the official Walloon genetic evaluation (EVALW) and covered up to six known ancestral generations.
Genealogical information for examinees was available for 3-4 ancestral generations in nearly all cases (and in some cases up to 6 generations), based on the self-reported information and parish records.
We are able to detect signals from two of three ancestral generations, and based on these signals, we have suggested scenarios that retrace history back a couple of billion years, but after a certain point, the signals are no longer detectable, and the accurate determination of the gene repertoire of ancestors is not possible.
We are able to detect signals from two of three ancestral generations, and based on these signals, we suggested scenarios that retrace history for a couple of billion years, but after a certain point, the signals are no longer detectable, and an accurate determination of the gene repertoire of ancestors is not possible (Lines: 302-306).
Frozen stocks of ancestral (G0) and generation 100 (G100) populations were revived (each with >10 individuals) and cultured for two generations under common conditions prior to the life-history assays in order to avoid confounding maternal and grand-maternal environmental effects.
