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由农杆菌介导将白叶枯病抗性基因Xa21转入我国的5个水稻品种 总被引:16,自引:0,他引:16
利用农杆菌介导的转化系统将已克隆的Xa21基因转入我国5个水稻主栽品种, 获得了110个独立的转基因系. 转基因植株的PCR和Southern分析揭示Xa21基因已整合到受体基因组. 已整合的Xa21基因能稳定遗传, 单拷贝整合的转化体在自交T1代呈现抗感3:1的分离. 接种实验表明转基因T0植株和Xa21-PCR阳性T1植株对白叶枯病的高度抗性. 经过筛选的Xa21纯合的具有优良品质的抗性转基因系可以作为品种直接种植, 或者用于杂交稻育种. 相似文献
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Introduction of a rice blight resistance gene,Xa21, into five Chinese rice varieties through anAgrobacterium-mediated system 总被引:7,自引:0,他引:7
A cloned gene, Xa21 was transferred into five widely-used Chinese rice varieties through an Agrobacterium-mediated system, and over 110 independent transgenic lines were obtained. PCR and Southern analysis of transgenic plants revealed the integration of the whole Xa21 gene into the host genomes. The integrated Xa21 gene was stably inherited, and segregated in a 3 : 1 ratio in the selfed T1 generation when one copy of the gene was integrated in the transfor-mants. Inoculation tests displayed that transgenic T0 plants and Xa21 PCR-positive T1 plants were highly resistant to bacterial blight disease. The selected Xa21 homozygous resistant transgenic lines with desirable qualities may be propagated as new varieties or utilized in hybrid rice breeding. 相似文献
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Expression of betaine aldehyde dehydrogenase gene and salinity tolerance in rice transgenic plants 总被引:9,自引:0,他引:9
Betaine as one of osmolytes plays an important role in osmoregulation of most high plants. Betaine aldehyde dehydrogenase C BADH) is the second enzyme involved in betaine biosynthesis. The BADH gene from a halophite, Atriplex hortensis, was transformed into rice cultivars by bombarment method. Totally 192 transgenic rice plants were obtained and most of them had higher salt tolerance than controls. Among transgenic plants transplanted in the saline pool containing 0.5% NaCl in a greenhouse, 22 survived, 13 of which set seeds, and the frequency of seed setting was very low, only 10% . But the controls could not grow under the same condition. The results of BADH ac-tivity assay and Northern blot showed that the BADH gene was integrated into chromosomes of transgenic plants and expressed. 相似文献
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基因枪转移Bar基因获得抗除草剂(Basta)的糜子蔗克隆再生植株 总被引:4,自引:0,他引:4
母秋华 原亚萍 贾玉峰 王金余 田文忠 何锶洁 李良材MU Qiu-hua YUAN Ya-ping JIA Yu-feng WANG Jin-yu TIAN Wen-zhong HE Si-jie LI Liang-cai 《遗传》1998,20(3):23-26
用糜子蔗(sorghum×sugarcane)×millet sorghum茎尖愈伤组织为受体,通过基因枪轰击将Bar基因转入糜子蔗细胞;用除草剂Basta含量分别为1、2.5、5、10mg/L的8114诱导与分化培养基上选择抗性愈伤组织;在Bast a含量为1与1.5mg/L筛选培养基上,选择出3个快速增殖并大量再生绿苗的体细胞无性系(Clone),如BarC1、BarC2、BarC3;BarC1、C2再生植株用Basta含量为1、2.5-5mg/L的溶液进行抗性检测,证明这些小植株具有极强的抗性。
Abstract:The Bar genes were introduced into〔(sorghum×sugarcane) ×millet sorghum〕callus cells using particle bombardment.The callus were cultured on the 8114 media with Basta,the Bastas concentration is 1,2.5 and 5,10mg/L.3 Clones with regenerated capacity were screened out on the media with Basta 1,2.5mg/L,for example BarC1,BarC2,BarC3.The regenerated plant from BarC1、BarC2 were cultured on the solution with Basta 1.5,2.5,and 5mg/L,high resistance were obtained in these regenerated plants. 相似文献
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植物抗毒素转化水稻和转基因植株的生物鉴定 总被引:15,自引:0,他引:15
用基因枪法转化了水稻(OryzasativaL.)6个材料的未成熟胚、成熟胚及胚性愈伤组织。质粒pSSVst1和pVE5+是由葡萄中分离出的编码芪类合成酶的植物抗毒素基因与35S或它自己的启动子组成。G418(100~150mg/L)或潮霉素(50mg/L)筛选后,经PCR、Southernblot或Dotblot分析证明的转基因植株共54株。对转基因植株及其后代进行了稻瘟病和白叶枯病的抗性鉴定。初步结果表明,芪类合成酶基因可以提高转基因植株及后代的抗性。 相似文献
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抗生素G418胁迫条件下转基因水稻种子发芽特性及应用 总被引:11,自引:1,他引:10
在不同浓度的抗生素G418胁迫条件下对抗稻瘟病转基因水稻纯系材料D2-1-2及其受体对照中花9号进行了发芽试验。培养7d的结果表明:不同浓度抗生素处理对两个材料萌动无显著的影响;随抗生素浓度的上升,两个材料发根种子数、种子根长、芽长均受到不同程度的抑制;当抗生素浓度达100mg/L时,转基因材料D2-1-2仍可正常长根(平均1.45cm),但中花9号明显受到抑制(平均0.27cm),二者存在明显差异;根据这一特性,从中花9号和D2-1-2混合群体中筛选出来的长根(大于0.5cm)种子经PCR检测88.46%是转基因个体。 相似文献