Summary
Incomplete family data were used to show the inheritance of the Ng locus in blue grouse. Three bands found on starch-gels were inherited as codominant alleles at a single autosomal locus. Mothers were in Hardy-Weinberg equilibrium. Chicks had two significant departures from equilibrium conditions but these were in opposite directions. Heterozygous females, NgS/NgM, produced too few heterozygous and rare homozygous, NgS/NgS, offspring. This deviation was not found among offspring from homozygous mothers. These results may be due to a phenomenon known as the unlike-homozygous-parent effect in cattle. No mechanism is known to account for these results. These analyses suggest that fitness is a complex function of different types of selection at different times in the year.
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Redfield, J. The use of incomplete family data in the analysis of genetics and selection at the Ng locus in blue grouse (Dendragapus obscurus). Heredity 31, 35–42 (1973). https://doi.org/10.1038/hdy.1973.57
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DOI: https://doi.org/10.1038/hdy.1973.57
