He Z, Zhu Q, Dabi T, Li D, Weigel D, Lamb C
Salk Institute for Biological Studies, La Jolla, California 92037, USA.
Transgenic Res. 2000 Jun;9(3):223-7. doi: 10.1023/a:1008992719010.
Onset of flowering, or heading date, is an important agronomic trait of cereal crops such as rice and early-heading varieties are required for certain regions in which rice is cultivated. Since the floral control gene LEAFY from Arabidopsis can dramatically accelerate flowering in dictoyledonous plants, the usefulness of LEAFY for manipulating heading date in rice has been tested. Constitutive expression of LEAFY from the cauliflower mosaic virus 35S promoter caused early flowering in transgenic rice, with a heading date that was 26-34 days earlier than that of wild-type plants. Early flowering was accompanied by a small yield penalty and some panicle abnormality. These observations suggest that floral regulatory genes from Arabidopsis are useful tools for heading date improvement in cereal crops.
开花起始，即抽穗期，是水稻等谷类作物的一个重要农艺性状，在某些水稻种植地区需要早熟品种。由于拟南芥的花控制基因LEAFY能显著加速双子叶植物的开花，因此已对LEAFY在调控水稻抽穗期方面的效用进行了测试。来自花椰菜花叶病毒35S启动子的LEAFY组成型表达导致转基因水稻早开花，其抽穗期比野生型植株早26 - 34天。早开花伴随着产量略有下降和一些穗异常。这些观察结果表明，来自拟南芥的花调控基因是改善谷类作物抽穗期的有用工具。
