Summary
Data on fruit yield, fruit size and a commercial appearance score were collected for strawberry seedlings from biparental progenies planted at two test locations. Similar data for 8 advanced selections from the California Strawberry Improvement Program were collected, with selections each subjected to three preplanting cold storage treatments and planted at a single location. Each progeny tested had at least one of the 8 selections as a parent. Offspring-parent regression heritabilities were computed using data from each combination of offspring location and parental treatment. Heritability estimates for yield and appearance differed significantly when different combinations of data were used; corresponding estimates for fruit size were unaffected. Gains predicted using heritabilities estimated by the convenient procedure of regressing unselected seedling values on those for vegetatively propagated parents will be reliable only for traits that are robust to rank shifts induced by planting/propagation treatments.
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Shaw, D.V. Variation among heritability estimates for strawberries obtained by offspring-parent regression with relatives raised in separate environments. Euphytica 44, 157–162 (1989). https://doi.org/10.1007/BF00022611
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DOI: https://doi.org/10.1007/BF00022611