Genetic analyses for bioactive potential in tetraploid potato (Solanum tuberosum L.)

• Published in: Plant breeding Vol. 137; no. 2; pp. 210 - 219
• Main Authors: Tierno, Roberto, Ruiz de Galarreta, Jose Ignacio
• Format: Journal Article
• Language: English
• Published: Berlin Wiley Subscription Services, Inc 01-04-2018
• Subjects: additive genetic variance; Anthocyanins; Antioxidants; Bioactive compounds; Biological activity; Breeding; Carotenoids; Combining ability; Cultivars; Genetic analysis; Heritability; Mathematical analysis; Measurement methods; North Carolina design; Parameter estimation; Parents; Phenolic compounds; Phenols; phytochemicals; Potatoes; Solanum tuberosum L; Spectrophotometry
• ISSN: 0179-9541; 1439-0523
• DOI: 10.1111/pbr.12570

A total of four traits related to bioactive potential of the tetraploid potato were studied in a North Carolina II cross‐experiment. The objectives of this study were to estimate genetic parameters for target bioactive compounds in a tetraploid potato population, to determine phenotypic and genotypic correlations and to calculate combining ability effects of cultivars and breeding lines included in the crossing scheme. Total monomeric anthocyanins, phenolics, carotenoids and hydrophilic antioxidant capacity were measured by spectrophotometric methods. The sources of variation female (GCAf), male (GCAm) and their interaction (SCA) were significant for bioactive compounds and antioxidant capacity. Narrow‐sense heritability estimates (h2) were moderate for all the traits (0.413–0.657). Both phenotypic and genotypic correlations were highly significant for phenolic compounds and antioxidant capacity. As regards combining ability, positive and negative GCA and also SCA effects have been identified for bioactive compounds and antioxidant capacity. These results indicate that hybrid breeding lines can be obtained by choosing parents with significant GCA, whose bioactive potential can also be further enhanced if the crosses have a significant SCA.