ESTIMATION OF NARROW-SENSE HERITABILITY FOR SPECIFIC GRAVITY IN DIPLOID POTATOES (SOLANUM-TUBEROSUM-SUBSP. PHUREJA AND STENOTOMUM)

Narrow-sense heritability was estimated for specific gravity in diploid potatoes grown at two locations in North Carolina. Three methods used to estimate narrow-sense heritability were realized heritability, parent-offspring regression, and half-sib family analysis. Nine narrow-sense heritability estimates obtained ranged from 0.276 to 0.739. The three estimates least biased by genotype × environment interaction provided an average estimate of 0.428. The selected population was significantly different from the unselected population in specific gravity. Comparable genetic variances in selected and unselected populations suggest that further selection cycles should be effective in increasing specific gravity. © 1979, Springer. All rights reserved.