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Regeneration and identification of interspecific asymmetric somatic hybrids obtained by donor-recipient fusion in cotton 总被引:1,自引:0,他引:1
LiLi Fu XiYan Yang XianLong Zhang ZhiWei Wang ChangHui Feng ChuanXiang Liu Pei-Yong Jiang JinLong Zhang 《科学通报(英文版)》2009,54(17):3035-3044
Asymmetric hybrids between Gossypium hirsutum (YZ-1) and G. davidsonii were obtained by donor-recipient fusion. YZ-1 was considered the recipient and was pretreated with iodoacetamide (IOA), while G. davidsonii was considered the donor and was irradiated with ultraviolet (UV) before fusion. YZ-1 protoplasts stopped growth when treated with 0.5 mmol/L IOA for 20 min, and G. davidsonii protoplasts stopped growth when irradiated with 38.7 J/cm2 UV for 30 s. Asymmetric somatic hybrids were obtained by electrofusion between the separately treated protoplasts of the 2 species. The regenerated plants were identified by morphological, cytological, and molecular analysis. Most regenerated plants derived from fused protoplasts displayed new morphology; some were intermediate between the two parents and a few displayed recipient-like morphology. Chromosome numbers in these somatic hybrids mostly ranged from 40 to 73. The hybridity was confirmed by random amplified polymorphic DNA and simple sequence repeat analysis. Organelle DNA inheritance of the YZ-1 and G. davidsonii somatic hybrid was investigated by cleaved amplified polymorphism sequence and chloroplast simple sequence repeat analysis, which indicated that recombination and rearrangements might have occurred in some regions of mitochondrial and chloroplastic DNA. This is the first report of completely asymmetric hybrid production via donor–recipient fusion between G. hirsutum and G. davidsonii, which is a novel case in hybrid production following the symmetric fusion and asymmetric fusion based on UV irradiation in cotton. 相似文献
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首次代表韶关参赛的韶关学院高脚竞速队,只训练了三个多月就在省赛获得金牌等优异成绩.通过研究和借鉴该队的训练方法有助于人们从事各项体育运动提高竞技水平以及从事体育新项目的挖掘与训练. 相似文献
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根据静电收集原理结合热喷涂制备粉末的特性,试制了适合于热喷涂制粉的静电收集器。用冷喷Al2O3粉末、石墨粉末、Al粉末以及热喷涂的方式对收集器的收集效率进行了测试。结果表明,影响静电收集器收集效率的参数有电压大小、板板间距、粉末类别等;静电收集器收集到的粉末是微细粉末。 相似文献
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孔子与苏格拉底是东西方所尊崇的智慧象征和人格典范,他们不仅是语言大师,同时也是修辞大师。二者在相同时代不同语境里所传递的话语信息均为精湛的修辞表达,但其终极修辞接受结果却大相径庭。从接受修辞学的学科视域着眼,其原因在于这两种修辞活动在接受渠道、接受者、接受语境、接受效果这四方面存在诸多异同点。 相似文献
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通过归经分析发现,中药方剂成分简化而药效反可更强。从这一发现提出构建分子方剂取代中药方剂。从中医运用中药的经验与理论,提出构建分子方剂的方法与法则。从分子方剂基础上提出创造新的、先进的药理理论与药物——分子方剂学、网络药理学、网络调节药,并阐述了其前景与路线。 相似文献
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为了缓解心脏移植手术的供体严重短缺的矛盾,对原设定的有关供体和受体的选择标准作了适当的放宽。通过对同一心脏中心的891例心脏移植手术的治疗效果的分析,发现52例接受供体年龄大于55岁的受心者实际生存率与839例供体年龄小于55岁的受心者相比无显著性差别(P=049)。年龄大于60岁时107例受心者与年龄小于60岁的受心者实际生存率相比也无显著性差别(P=010)。因此,在供体和受体的选择标准方面放宽限制,更能充分发挥心脏移植治疗更多的终末期心脏病的有效作用 相似文献
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在60例家鸽顶盖脑片上,利用胞外记录研究了γ-氨基丁酸(γ-aminobutyric acid,GABA)和荷包牡丹碱(bicuculline,BIC)对顶盖视网膜接受区神经元自发放电及刺激Ⅰ层诱发的抑制反应的影响,灌流GABA(1-10mmol/L)抑制了60个神经元中的52个神经元的电活动,这些抑制效应呈剂量依赖关系,GABA的抑制效应绝大部分可被GABAA受体拮抗剂BIC所阻断。单独灌流BI 相似文献
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