Genetic variation of seedling traits responded to brassinosteroid and gibberellin inhibitors in maize (Zea mays) doubled haploid lines. (15th July 2020)

• Record Type: Journal Article
• Authors: Hu, Kun; Xie, Ying; Wu, Chenglai; Frei, Ursula K.; Lübberstedt, Thomas
• Editors: Tuberosa, Roberto
• Is Part Of: Plant breeding. Volume 139:Number 5(2020)
• Page Start: 870
• Page End: 882
• Publication Date: 2020-07-15
• Subjects: brassinosteroid -- genetic variation -- gibberellins -- maize DH lines -- mesocotyl length -- seedling traits; Plant breeding -- Periodicals; 631.52
• DOI: 10.1111/pbr.12845
• Languages: English
• ISSNs: 0179-9541

Abstract

Abstract: The purpose of this study was to examine the genotypic variation in maize doubled haploid (DH) lines response to brassinosteroid and gibberellin inhibitors. Plant responses to hormone inhibitors were determined in growth chamber experiments using germination paper for three different seedling treatments: application of propiconazole (Pcz), uniconazole (Ucz) or water (control). Mesocotyl length (ML) was more sensitive to hormone inhibitors, especially to the Ucz treatment, than other seedling traits. ML was significantly correlated with other traits in the Ucz treatment. All the seedling traits showed moderate‐to‐high broad sense heritability values, ranging from 0.39 to 0.82. The Euclidian genetic distances of inbred line pairs ranged from 1.27 to 19.94, indicating there was a high level of variability across the maize DH lines used in this study. DH lines with extreme MLs were identified, which can provide valuable breeding resources for improving abiotic stress tolerance, and for further genetic studies.