Related Experiment Video
Updated: May 5, 2026

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis
Published on: August 12, 2019
Genetic variance and drift in selfed and intermated populations derived from backcrossing
1USDA-ARS, Agronomy Department, Kansas State University, 66506, Manhattan, KS, USA.
Abstract:
The genetic variance among random-mated lines derived from backcrossing (BCgS1 lines) depends upon the backcross generation (g) and the number (n) of BCgF1 plants crossed in generations 1 through g. There is little effect of n on genetic variance for n > 6. The genetic variance among BCgF2-derived lines is greater than that among BCgS1 lines for all g. If either BCgF2-derived or BCgS1 lines are used as a base population for recurrent selection, 8, 16, 32, and 64 BC1F1, BC2F1, BC3F1, and BC4F1 plants, respectively, should be used to avoid loss of donor alleles to drift.
Related Concept Videos
Mutation, Gene Flow, and Genetic Drift
Genetic Drift
Gene Flow
What is Population Genetics?
Genetic Variation
Genes exist in different versions called alleles,...
Dihybrid Crosses

