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    • 2. 发明授权
    • Methods for maize transformation coupled with adventitious regeneration
utilizing nodal section explants and mature zygotic embryos
    • 玉米转化方法与利用节段外植体和成熟合子胚胎的不定期再生相结合
    • US6140555A
    • 2000-10-31
    • US92180
    • 1998-06-05
    • Nancy A. ReichertVanishree Rudraswamy
    • Nancy A. ReichertVanishree Rudraswamy
    • C12N15/82A01H4/00A01H1/00C12N5/04C12N15/87
    • C12N15/8207
    • Maize tissue may be regenerated from nodal extracts prepared from germinated mature seeds and germinated embryos. Nodal section explants are secured from seedlings in 3-5 days. The explants are grown on an induction medium until adventitious shoot formation is observed. The shoots are separated and elongated on an MS-based medium, and then rooted. Fast genotype-independent regeneration is obtained, in 12-14 weeks. These explants, as well as zygotic embryos, may be transformed with exogenous DNA using a biolistic approach, where DNA precipitated onto tungsten microprojectiles is accelerated as 650 psi towards the explants at a distance of at least 7.5 microns. Improved frequency of transformation is obtained using microprojectiles which prior to DNA precipitation were frozen in glycerol, and suspending from a preparation of 2.5 M CaCl.sub.2. The combination of transformation process and regeneration can be used, independent of genotype, to provide new commercial crop organisms.
    • 可以从由发芽的成熟种子和发芽胚中制备的节点提取物中再生玉米组织。 结节外植体在3-5天内从幼苗中获得。 外植体在诱导培养基上生长,直到观察到不定芽形成。 芽在MS基培养基上分离和细长,然后扎根。 在12-14周内获得快速基因型独立再生。 这些外植体以及合子胚可以使用生物弹性方法用外源DNA转化,其中沉淀到钨微粒上的DNA以至少7.5微米的距离向外植体加速650psi。 使用在DNA沉淀之前的微粒子在甘油中冷冻并从2.5M CaCl 2的制剂中悬浮获得改进的转化频率。 可以使用转基因和再生的组合,与基因型无关,提供新的商业作物生物。
    • 6. 发明授权
    • Methods for maize transformation coupled with adventitious regeneration utilizing nodal section explants and mature zygotic embryos
    • 玉米转化方法与利用节段外植体和成熟合子胚胎的不定期再生相结合
    • US06570068B1
    • 2003-05-27
    • US09698080
    • 2000-10-30
    • Margaret M. YoungNancy A. Reichert
    • Margaret M. YoungNancy A. Reichert
    • A01H100
    • C12N15/8207
    • Maize tissue may be regenerated from nodal extracts prepared from germinated mature seeds and germinated embryos grown in a medium containing plant growth regulators. Nodal section explants are secured from seedlings approximately 3-10 days old, preferably from 3-7 days old. The explants are grown on an induction medium until adventitious shoot formation is observed. The shoots are separated and elongated on an MS-based medium, and then rooted. Fast genotype-independent regeneration is obtained, in 12-14 weeks. These explants, as well as zygotic embryos, may be transformed with exogenous DNA using a biolistic approach, where DNA precipitated onto tungsten microprojectiles is accelerated at a minimum of 650 psi towards the explants at a distance of at least 7.5 cm. Improved frequency of transformation is obtained using microprojectiles which prior to DNA precipitation were frozen in glycerol, and suspending from a preparation of 2.5 M CaCl2. The combination of transformation process and regeneration can be used, independent of genotype, to provide new commercial crop organisms.
    • 可以从由发芽成熟种子制备的节点提取物和在含有植物生长调节剂的培养基中生长的发芽胚胎再生玉米组织。 从约3-10天龄的幼苗中获得节段外植体,优选3-7天龄。 外植体在诱导培养基上生长,直到观察到不定芽形成。 芽在MS基培养基上分离和细长,然后扎根。 在12-14周内获得快速基因型独立再生。 这些外植体以及合子胚可以使用生物弹道学方法用外源DNA转化,其中沉淀到钨微粒上的DNA在至少7.5cm的距离处以至少650psi的速度向外植体加速。 使用在DNA沉淀之前的微粒子在甘油中冷冻并从2.5M CaCl 2的制剂中悬浮获得改进的转化频率。 可以使用转基因和再生的组合,与基因型无关,提供新的商业作物生物。