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1.
对水稻5个品种的种胚和11个品种的幼穗在含不同激素浓度的MS培养基上培养,诱导愈伤组织并再生绿苗。品种间在愈伤组织诱导率、绿苗分化率和对激素的诱导效应表现了基因型差异。幼穗愈伤组织诱导率和绿苗分化率高于种胚。种胚的盾片愈伤组织分化能力高于胚轴,胚芽鞘的未分化得绿苗。去分化培养基添加2,4—D2mg/1+KT0.5mg/1,诱导愈伤组织的效果甚佳,并促进绿苗分化。选择胚性愈伤组织继代培养,种胚的培养270天,幼穗的培养210天,仍有部分品种保持较高的绿苗分化率。 相似文献
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《江苏农业科学》2016,(11)
高粱是重要的杂粮作物之一,其组织培养研究对高粱再生体系建立以及高粱转基因育种具有重要意义。以6个基因型的高粱幼穗为外植体,研究光照、激素、基本培养基以及基因型对幼穗愈伤组织诱导和分化的影响。结果表明:对于高粱幼穗愈伤组织的诱导培养,光照有利于幼穗愈伤组织的诱导;2,4-D和KT混合使用的效果比2,4-D单独使用好;3种基本培养基对幼穗愈伤诱导影响差异不显著;不同基因型对幼穗愈伤诱导影响差异显著,且5种不同基因型材料的愈伤诱导能力大小为M81-E07-27BJ-285=考利罗马。对于高粱幼穗愈伤组织的分化培养,3种培养基中只有MS培养基和NB培养基分化出再生苗;6种基因型中只有忻粱52分化出绿苗,分化率为11.49%。 相似文献
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以雅安扁穗牛鞭草的幼穗为外植体,研究了2,4-D浓度和不同取材部位对愈伤组织诱导的影响以及继代培养时不同浓度的2,4-D对愈伤组织增殖、分化、生根的影响.结果表明:以幼穗下部为外植体接种在MS+2,4-D 7.0 mg/L培养基中,颗粒状愈伤组织的诱导率高达100.00％;MS+2,4-D 1.0 mg/L是幼穗愈伤组织较为适宜的继代增殖培养基,在该培养基上颗粒状胚性愈伤组织的出愈率为89.44％,愈伤组织的绿苗分化率和生根率都可达100％,平均绿芽点数和生根数等均极显著高于其他处理. 相似文献
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不同培养基对小麦幼胚再生能力的影响 总被引：11，自引：0，他引：11
以安徽省小麦主栽品种扬麦87158、安农98005、安农92484三个品种的小麦幼胚为试验材料,接种于SD2和MM2种培养基上,探讨不同培养基对不同基因型小麦幼胚再生能力的影响。通过对其愈伤组织诱导率、愈伤组织的质量和绿苗分化率的比较,初步证明SD2培养基对小麦幼胚的再生能力效果好,可以作为转基因小麦育种中的培养手段。 相似文献
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内源激素对水稻不同外植体培养力的影响 总被引：5，自引：0，他引：5
利用HPLC法对愈伤组织诱导率和绿苗分化率有差异的几个水稻品种的不同外植体(花药、幼穗、幼胚和成熟胚)及其愈伤组织的内源激素含量进行测定分析。结果表明,内源激素的含量和配比是影响愈伤组织诱导和绿苗分化的关键因素之一。不同外植体中的内源激素对愈伤组织诱导率的表现为:Z ZR呈负效应,IAA呈正效应,GA除成熟胚外呈负效应。愈伤组织中内源激素对绿苗分化率的影响表现为:IAA和GA呈负效应,ABA、Z ZR呈正效应。内源激素的配比对愈伤组织诱导率和绿苗分化率有一定作用,表现为:IAA/Z ZR对愈伤组织诱导率有一定的正效应,Z ZR/IAA、ABA/IAA对绿苗分化率呈显著正相关。 相似文献
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玉米骨干自交系幼胚再生体系的建立 总被引：3，自引：2，他引：1
以玉米骨干自交系‘87-1’、‘综3’、‘137’和‘K12’的幼胚为外植体,研究了影响玉米幼胚再生体系建立的相关因素.结果表明:87-1幼胚在附加500 mg.L-1L-Pro5、00 mg.L-1L-Asn和2.5 mg.L-12,4-D的N6B5基本培养基上愈伤组织诱导率最高,平均可高达98.1%;初级愈伤组织在附加500 mg.L-1L-Pro5、00 mg.L-1L-Asn和1.25 mg.L-12,4-D的N6B5继代培养基上胚性愈伤组织诱导率最高,平均可高达65.6%.在相同诱导、继代培养基和相同培养条件下,4个不同基因型玉米骨干自交系的愈伤组织诱导率无显著性差异,而其胚性愈伤组织诱导率具有显著性差异.继代培养次数对绿苗分化率也产生重要影响,具有显著性差异,其中,1次继代分化率最高;1/2MS培养基附加0.2 mg.L-1KT更有利于分化苗生根. 相似文献
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[目的]通过对玉米幼胚培养,建立一套稳定性好、再生率高的组织培养体系.[方法]以4个玉米自交系幼胚为外植体,研究不同基因型、幼胚大小、2,4-D浓度、AgN03浓度对愈伤组织诱导的影响,进一步研究6 - BA和蔗糖浓度对愈伤组织分化及IBA和NAA对再生苗的生根影响.[结果]2,4-D浓度为2.0 ～3.0mg/L,幼胚长度为1.0～2.0 mm时,对胚性愈伤组织诱导有良好效果;在诱导期间采用隔代法添加10 mg/LAgNO3能提高胚性愈伤组织的诱导率;当6- BA为0.5 mg/L、蔗糖浓度为50 g/L时,愈伤组织分化率最高且有利于小植株的形成;IBA浓度为0.6 mg/L对植株生根较有利.[结论]对4个玉米自交系幼胚培养研究筛选出适宜玉米幼胚培养的最佳诱导、分化及生根培养基. 相似文献
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[目的]研究不同基因型亚麻花粉小孢子离体培养,建立亚麻花粉小孢子离体培养再生体系,以期加快亚麻单倍体育种进程。[方法]以5种不同基因型亚麻的花粉小孢子为外植体,研究不同基因型亚麻愈伤组织诱导率、绿苗的分化率的差异,筛选适宜亚麻花粉小孢子培养基。[结果]不同基因型的亚麻花粉愈伤组织的诱导率、绿苗分化率差异显著,9601和9605愈伤组织的诱导率较高,分别为30.8%和28.6%;9601组合的花粉绿苗分化频率最高为14.5%。其次为9718和9712,分化率分别为11.5%和8.0%;筛选出亚麻花粉小孢子适宜的愈伤组织诱导培养基HF1、绿苗分化培养基HF2。[结论]初步建立了亚麻花粉小孢子离体培养再生体系,为亚麻单倍体育种、突变体筛选、转基因等研究奠定了基础。 相似文献
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玉米幼胚和成熟胚愈伤组织分化反应性比较 总被引：14，自引：0，他引：14
以鲜食玉米为主的13种基因型的成熟胚和幼胚为材料，对它们的愈伤组织诱导．继代培养和分化进行了系统研究。结果表明：玉米的成熟胚和幼胚愈伤诱导率相关，但两种胚诱导出的愈伤组织状态明显不同．幼胚诱导出的愈伤组织状态普遍比成熟胚的好；两种胚的愈伤分化率差异明显，成熟胚愈伤组织最高分化率为2．5％,幼胚愈伤组织最高分化率可达83．3％。 相似文献
11.
裸燕麦幼穗愈伤组织诱导及植株再生技术 总被引：1，自引：1，他引：1
主要研究了３个裸燕麦品种不同幼穗长度的离体培养效应。结果表明：（１）幼穗离体培养的适宜长度为１．０～２．０ｃｍ，出愈率为７４．７％；（２）基因型在幼穗培养中起着重要作用，３个品种的幼穗出愈率有显著的差异；（３）通过调节培养基中的激素，可以获得较高的出愈率和绿苗率；（４）愈伤组织再生植株既可通过器官发生途径，也可以通过胚胎发生途径来形成，这主要取决于培养基中激素的比例。 相似文献
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不同小麦品种成熟胚愈伤组织诱导及分化的研究 总被引：7，自引：1，他引：7
以长江流域及华中地区推广的24个小麦品种为材料，分析、比较其成熟胚在3种诱导培养基和1种分化培养基上的愈伤诱导和分化频率。结果表明：不同诱导培养基在愈伤诱导率上存在显著差异，添加ABA的MB5培养基诱导效果最佳；不同小麦品种对培养条件的反应不同，华9943、华9914等4个品种在3种培养基上的诱导频率相同，而其余品种在3种培养基上的愈伤诱导率差异极显著。在分化绿点和成苗率上，品种间差异十分明显，农大146、苏麦6号、扬麦158、华麦12号和华麦8号的再生力强。因此，在小麦成熟胚培养中，筛选优良的基因型培养基组合是必要的。 相似文献
13.
An efficient plant regeneration system was developed from the immature embryos of Triticum aestivum L. Thinopyrum intermedium alien disomic addition lines, which resistant to powdery mildew. The protocol was based on a series of experiments involving the callus induction and differentiation. The experiment studied the effects ofmature embryos. We found that the embryembryo size on callus induction and differentiation of the immature embryos. We found that the embryo size is critical for the establishment of embryogenic callus. Immature embryos (0.8 ~ 1.5 ram) showed high ability to produce embryogenie callus capable of regenerating green plants. The medium Murashige and Skoog‘ s (MS) added with 2mg/L 2, 4-diehlo-rophenoxyacetic acid (2, 4-D) gave the best embryogenic callus induction, maintenance and regeneration. The embryogenic callus maintained high regeneration during six subcultures in the callus induction medium. Suitable time ofpartialdesiccation could effectively improve the regeneration capacity of the callus cultured for 3-4 month. Bud green spot and root green spot were observed during the differentiation of callus and the difference between them was described. Regenerated shoots were rooted on half-strength MS medium containing 0.2 mg/L Naphthalene acetic acid (NAA). Plants were successfully transferred to soil and grew well. This efficient plant regeneration system provides a foundation for the study of somaclonal variation of Triticum aestivum L.- Thinopyrum intermedium alien disomic addition lines. 相似文献
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The effects of auxins and media on callus induction from the mature and immature embryos of Chinese spring wheat(Triticum aestivum L.) varieties were investigated. It was found that genotype, medium, auxin source and concentration had the significant effects on the induction of embryogenic callus, explants germination and the increment of callus fresh weight. For immature embryos cultured on MS medium, 2 mg L-1of 2, 4-D was optimal, and the highest frequency of embryogenic callus (33.50%) was observed. For the mature embryos on N6 medium, 4 mg L-1 of 2, 4-D was optimal. The frequency of embryogenic callus and increment of callus fresh weight on 2, 4, 5-T media were higher than those on 2, 4-D media, and in the presence of 2, 4, 5-T the precocious germination of explants for all genotypes were significantly suppressed. These results indicated that 2, 4, 5-T was superior to 2, 4-D and NAA in the culture of immature embryos. This is the first report about the effect of 2, 4, 5-T and NAA on wheat tissue culture, particularly in comparison with 2, 4-D in detail. 相似文献
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The effect of varieties and media compositions on callus induction from rice anther and subsequent plant regeneration was studied. The results showed that the callus induction was not significantly different in different media, but mostly depended on genotypes; mean frequency of callus induction on F1 hybrid varieties showed that the medium supplemented with 100 mg · L-1 concentration of the proline was useful for callus induction; when the anther derived callus sub-cultured on MS medium supplemented with B... 相似文献
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不同小麦品种成熟胚愈伤组织的培养研究 总被引：2，自引：0，他引：2
[目的]通过对河北省小麦品种的种子进行组织培养,探索适合河北省栽培小麦品种的培养条件,为河北省小麦的遗传改良工作奠定基础。[方法]对4种不同小麦品种的成熟胚进行离体培养,研究影响小麦愈伤组织诱导的因素。[结果]结果表明:将成熟胚盾片向上放置可明显提高愈伤组织的诱导率;利用2 mg/L 2,4-D并添加水解酪蛋白,可使不同品种小麦愈伤组织得出愈率均高达80%;此外,不同品种的出愈率随着2,4-D浓度的升高存在较大差别。[结论]该研究探索影响小麦成熟胚愈伤组织诱导的因素,建立一套合适的植株再生体系,为加强我国小麦的遗传转化奠定了基础。 相似文献
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Study on Plant Regeneration of Wheat Mature Embryos Under Endosperm-Supported Culture 总被引：5，自引：0，他引：5
CHEN Jun-ying YUE Run-qing XU Hai-xian CHEN Xin-jian 《中国农业科学(英文版)》2006,5(8):572-578
To reveal the suitability of using mature embryos as an explant source in wheat tissue culture, mature embryos from eight common wheat cultivars （Triticum aestivum L. cv.） were cultured with or without endosperm to test their efficiency of callus induction and plant regeneration. When embryos were cultured together with endosperm （endosperm-supported culture, ES）, the percentage of callus induction was significantly lower than that when embryos were cultured in the absence of endosperm （non-endosperm-supported culture, NES）. This pattern was evident in most genotypes, regardless of whether 2 or 8 mg L^-1 2,4-D was added in the NES culture. However, in ES culture, more induced calli were differentiated into distinct green spots and they further developed into plantlets. Thus, more plants were regenerated in ES culture than in the NES treatment. Most of the eight tested genotypes showed a significant difference in callus induction rate and plantlet regeneration in both ES and NES cultures. In addition, the enzymatic activity of oxalate oxidase in the callus of ES culture condition was obviously higher than that in the callus of NES culture condition, suggesting that the activity of oxalate oxidase may be a parameter for selection of calli with potential for plantlet regeneration. These results indicate that wheat mature embryos are valuable explants for highly efficient callus induction and plant regeneration, if proper treatment and medium are used. 相似文献