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 was more sensitive to hormone inhibitors, especially to the Ucz treatment, than other seedling traits. Mesocotyl length 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 mesocotyl lengths were identified, which can provide valuable breeding resources for improving abiotic stress tolerance, and for further genetic studies.
Available at: http://works.bepress.com/thomas-lubberstedt/115/
This is the peer reviewed version of the following article: Hu, Kun, Ying Xie, Chenglai Wu, Ursula K. Frei, and Thomas Lübberstedt. "Genetic variation of seedling traits responded to brassinosteroid and gibberellin inhibitors in maize (Zea mays) doubled haploid lines." Plant Breeding (2020), which has been published in final form at doi: 10.1111/pbr.12845. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.