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- Title
化学诱变获得甘蓝型油菜矮秆突变新种质.
- Authors
郎春秀; 刘仁虎; 郑滔; 王伏林; 石江华; 胡张华; 吴关庭
- Abstract
The discovery and creation of dwarf germplasm resources of oilseed rape (Brassica napus L.) are of great significance for developing new varieties with moderate plant dwarfing, strong lodging resistance, high and stable yield, and good suitability for mechanized harvesting. In this study, two dwarf mutants 3060 and 4036 were obtained by treating seeds of Brassica napus cultivar Zheyou 50 with the chemical mutagen ethyl methane sulphonate (EMS). The two mutants were 74.5 cm and 72.0 cm in plant height respectively, all with a compact and upright plant type. Many phenotypic characteristics at seedling and maturation stages as well as quality traits including seed fatty acid composition and oil content in the two mutants were significantly changed compared with the original parent. The results of genetic analysis preliminarily showed that the two dwarf mutations were controlled by a single recessive gene or a recessive major gene without cytoplasmic effects. Seedling morphogenesis of the two mutants was normal under light and dark conditions, suggesting that their dwarfing mechanism was unrelated to brassinosteroids pathway. Seedling hypocotyl elongation of the two mutants could be significantly promoted by spraying different concentrations of exogenous gibberellin, but hypocotyl length could not be restored to the level of the original parent, indicating that the occurrence of dwarf mutations might be related to variation(s) in the gibberellin signal transduction pathway. The two dwarf mutants were believed to have a certain utilization value because of their some important characteristics.
- Publication
Acta Agriculturae Zhejiangensis, 2023, Vol 35, Issue 11, p2516
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.20221564