Inbreeding depression and concealed deleterious mutations in buckwheat populations, Fagopyrum esculentum.

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Abstract
Using 131 sib-mated lines of buckwheat, F. esculentum Moench, the homozygous genetic load for viability was estimated by a modification of the Morton-Crow-Muller method, under favorable and unfavorable environmental conditions. Two kinds of genetic load, designated A and B, were estimated to be 0.225 and 0.653 in favorable conditions, and 0.343 and 2.623 in unfavorable conditions, respectively. Concealed genetic variability was maintained within the cultivated buckwheat population. A method for estimating the gentic fitness of the species is described.