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1.
为了提高小麦成熟胚的分化率、研究小麦成熟胚的组培特性及筛选出高效再生的小麦品种,选取了36个小麦品种为供试材料,研究了不同愈伤诱导时间对成熟胚组培特性的影响、在分化培养基中添加不同浓度KT对成熟胚分化的影响,以及愈伤组织进行不同时间干燥处理后对愈伤分化的影响;并对30个参试品种中具有高效再生率的基因型进行了筛选。结果表明,出愈率随诱导时间呈正向变化,但分化率则表现先增加后降低的变化趋势,且在12 d左右 可以达到较为理想的分化效果;当KT浓度为0.5 mg·L-1时分化效果最好;转入分化培养基之前对愈伤进行8~12 h干燥处理可显著提高分化率;在供试的30个地方品种中,有15个小麦品种的分化率达到30%以上,其中泰山1389、淮麦20及泛麦5号的分化率依次达到41.5%、41.2%及39.6%。因此,在小麦成熟胚培养过程中愈伤诱导12 d,转接至分化培养基前干燥处理8~12 h及分化培养基中添加0.5 mg·L-1 KT可以达到较为理想的愈伤分化数。本研究从不同地方品种中筛选出的一些高效再生的小麦品种可以作为遗传转化的受体材料。  相似文献   

2.
小麦成熟胚愈伤组织的诱导与分化   总被引:1,自引:0,他引:1  
贵梦园  周岩  魏琦超  何楠楠 《安徽农业科学》2009,37(23):10891-10892
[目的]筛选再生能力强的基因型小麦品种,建立高效的小麦成熟胚高频植株再生系统。[方法]以小麦品种抗冻早-30、百麦4411和06-4046的成熟胚为外植体,以MS为基本培养基,添加不同激素,组配诱导、继代、分化和生根培养基,通过胚性愈伤组织诱导。探讨影响小麦愈伤组织诱导和分化的因素。[结果]2,4-D浓度为1—5mg/L时对3个小麦品种愈伤组织的诱导差异不大,诱导率均高于80%,但2,4-D浓度为2mg/L时更有利于诱导胚性愈伤组织,诱导率在90%以上;在抗冻早-30和百麦4411分化培养基中加入2mg/L KT有助于提高分化率和再生率,在06-4046分化培养基中加入0.5mg/L KT对小麦成熟胚的分化和再生苗比较有利。[结论]在MS培养基中添加2mg/L2,4-D和一定量的KT可促进小麦成熟胚愈伤组织的诱导和分化再生苗。  相似文献   

3.
不同基因型对小麦成熟胚愈伤组织诱导及植株再生的影响   总被引:7,自引:1,他引:7  
以26种不同基因型小麦成熟胚为外植体,采用1种诱导培养基、3种分化培养基,研究了不同基因型间愈伤组织诱导及植株再生的遗传差异.结果表明,不同基因型间出愈率及植株再生率差异显著,豫麦21号在26个小麦品种中表现最佳,3种分化培养基的分化效果差异明显.  相似文献   

4.
以甘春24成熟胚为外植体,研究消毒方式、浸种时间、接种方式、2,4-D质量浓度等处理对愈伤组织诱导与分化的影响,旨在建立一套有效的小麦高频再生体系。结果表明,不同消毒处理、2,4-D质量浓度和接种方法对成熟胚愈伤组织分化有极显著影响,不同浸种时间对成熟胚愈伤组织分化的影响差异不显著。采用25%NaClO初次消毒25min,浸种后用25%NaClO消毒10min,对愈伤组织的诱导较好,对成熟胚伤害小,且污染率低;浸种15~21h,对成熟胚愈伤组织的诱导无明显差异,但浸种18或21h有利于胚性愈伤组织的分化;成熟胚刮碎处理,有利于愈伤组织的诱导与分化,其诱导率与绿点率分别为98.33%,62.04%;当2,4-D质量浓度为2.5mg/L时,甘春24胚性愈伤组织品质较好。  相似文献   

5.
小麦胚愈伤组织的诱导和植株再生   总被引:13,自引:0,他引:13  
对3个小麦品种的成熟胚及幼胚进行培养,研究不同基因型、培养基对愈伤组织诱导及分化的影响。结果表明,不同培养基对小麦愈伤组织诱导有一定影响;不同基因型的小麦愈伤组织诱导、分化及生根的能力有一定差别。陕280愈伤组织诱导率及分化率最高。同一品种不同外植体经诱导后愈伤组织产生的能力有所不同,同一品种愈伤组织的诱导率幼胚比成熟胚愈伤组织的高。  相似文献   

6.
不同培养基及激素配比对小麦成熟胚离体培养的影响   总被引:1,自引:0,他引:1  
[目的]建立适于优良小麦品种遗传转化的高效组织培养再生体系。[方法]以小麦品种豫麦18和豫麦70成熟胚为外植体,探讨了2种培养基和4种激素配比对小麦成熟胚离体培养的影响。[结果]L3培养基的平均愈伤组织诱导率和分化率都明显高于MS培养基,供试2个品种平均出愈率达91.0%以上,平均分化率达46.4%。不同激素及其配比均可诱导小麦成熟胚愈伤组织分化,但不同处理分化率差别很大(10.5%~50.0%);以L3为分化培养基,同时添加2,4-D 0.1mg/L,6-BA 1.5 mg/L的激素配比更有利于愈伤组织的分化,平均分化率达到50.0%。[结论]MS、L3两种基本培养基对小麦成熟胚愈伤组织诱导率均比较高,且差别不大。不同激素配比对小麦成熟胚愈伤组织分化率影响很大。  相似文献   

7.
分别以多年生黑麦草品种夜影的成熟胚和生长点为外植体,在6种培养基上进行愈伤组织诱导,比较接种60 d时的诱导率及愈伤组织形态,并将继代培养后的胚性愈伤组织转接到4种不同的分化培养基上进行再生苗分化。结果表明,生长点愈伤组织诱导率和分化率明显高于成熟胚,5.0 mg/L的2,4-D是诱导黑麦草品种夜影愈伤组织的最佳浓度,胚性愈伤组织在添加1.0 mg/L 6-BA的培养基上分化率最高。  相似文献   

8.
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   

9.
西北粳稻成熟胚高频再生体系研究   总被引:1,自引:0,他引:1  
【目的】研究基因型、培养基、激素、碳源的种类和质量浓度对西北粳稻成熟胚培养特性的影响,建立西北粳稻成熟胚离体再生体系。【方法】以4个西北粳稻品种宁粳16、宁粳34、宁粳35和宁粳38的成熟胚为材料,利用组织培养法,对水稻成熟胚进行脱分化和再分化,获得再生植株,研究培养基、基因型及激素、碳源质量浓度和种类对西北粳稻成熟胚愈伤组织诱导和分化的影响。【结果】基因型对西北粳稻成熟胚培养的影响较大,参试材料中宁粳34的培养特性最好;N6和NB 2种培养基对西北粳稻培养效果的影响随粳稻品种基因型的不同而不同;诱导培养基中添加2,4-D的质量浓度以2 mg/L为好,添加0.2~0.5 mg/L的6-BA可提高西北粳稻成熟胚的愈伤组织诱导率和绿苗分化率。以麦芽糖和蔗糖为碳源时,西北粳稻愈伤组织诱导率和绿苗分化率均较高,蔗糖质量浓度为30~40g/L时培养效果最佳。【结论】基本明确了基因型、培养基、激素、碳源对西北粳稻成熟胚离体培养特性的影响效果,初步建立了西北粳稻成熟胚高频再生体系。  相似文献   

10.
植物生长调节剂优化不同品种冬小麦成熟胚再生体系   总被引:1,自引:0,他引:1  
《山东农业科学》2019,(5):19-23
小麦愈伤组织再生能力是遗传转化的重要基础。为优化小麦成熟胚再生体系,以科农199、轮选987和济麦22三个冬小麦品种的成熟胚为外植体,在愈伤组织分化阶段添加不同浓度的植物生长调节剂TDZ(N-苯基-N′-1, 2, 3-噻二唑-5-脲,thidiazuron),统计和分析分化率。结果表明,TDZ最适响应浓度存在品种间差异,科农199、轮选987和济麦22成熟胚愈伤组织分化的最适TDZ浓度分别为1.5、1.0、0.5 mg/L,愈伤组织分化率分别为84.61%、71.88%和71.77%,均极显著高于对照。本研究结果可为优化冬小麦成熟胚愈伤组织再生体系提供参考。  相似文献   

11.
To establish a highly efficient plant regeneration system for wheat genetic transformation, the effects of three different concentrations of dicamba and two different sugar types on callus induction and plant regeneration from mature embryo cultures were evaluated. Callus induction and plant regeneration were obtained from mature embryos of two commercial cultivars Zhoumai 18 and Yumai 34 (Triticum aestivum L.) cultured on L3 basal medium. The results showed that the efficiency of mature embryo culture was significantly influenced by the genotypes, sugar types and dicamba concentrations. 4 mg L^-1 dicamba proved the best effective for inducing embryogenic callus and also gave the highest proportion of plants regenerated across the two cultivars. Substitution of maltose by sucrose significantly improved the plant regeneration efficiency in both cultivars. There was a significant interaction between genotype-by-sugar types, and sugar types-bydicamba concentrations. Overall, Zhoumai 18 gave the highest frequency of plant regeneration (82.65%) when dicamba concentration was 4.0 mg L^-1 and with sucrose in initial callus induction. These results will facilitate genetic transformation work with elite wheat.  相似文献   

12.
【研究目的】为了筛选出小麦(TriticumaestivumL.)成熟胚(MEs)培养和遗传转化受体材料的优良基因型,【方法】以27份优良普通小麦冬性主栽品种或高代育种品系为试材,采用整粒切胚诱愈方法(endosperm-supportedmethod),对小麦成熟胚进行组织培养研究。【结果】结果表明,在成熟胚培养过程中光照、温度、培养基2,4-D浓度、基因型等因素对小麦成熟胚组织培养影响较大;同时小麦成熟胚组织培养存在着较强的基因型依赖性,不同基因型愈伤组织诱导率、分化率、成苗率的差异具有统计学意义(P<0.01)。通过研究从27个小麦基因型中筛选出了3个适合于成熟胚整粒切胚诱愈的基因型,即山农2618、泰山021、河北341,他们的成苗率分别达到了15.38%、25.27%、21.33%。【结论】小麦成熟胚组织培养优良基因型的筛选,为以后小麦的遗传转化和应用基因工程技术进行遗传改良奠定了基础。  相似文献   

13.
Establishment of a highly efficient regeneration system for the mature embryo of wheat will provide a convenient tool for wheat tissue culture and transformation,thereby facilitating the transformation of foreign genes into wheat.By using the mature embryos derived from 20 different wheat lines including Shi 4185,Yumai 66,Lunxuan 987,CB037,Yangmai 6,Xinchun 9,Bobwhite,Han 6172,Zheng 9023,Jimai 20,Ningchun 4,and Jing 411,the effects of some factors including inoculation methods,initiating culture media,organic additives,antioxidants,and auxins on the regeneration from the explants were evaluated.The results indicated that the scraping embryo culture was better than the whole embryo culture,the Aa medium was better than the SD2 medium and dicamba was better than 2,4-D in increasing the regeneration frequency.An Adi medium was established in this study by adding silver nitrate,cysteine,ascorbic acid,dicamba,glutamine into the Aa medium at the concentration of 4,40,100,2,and 5 mg L-1,respectively.By using the Adi medium and the scraping technique,the regeneration frequencies of the mature embryos of CB037,Lunxuan 987,Han 6172,Yangmai 6,Bobwhite,Zheng 9023,Shi 4185,and Jimai 20 became 85.6,60.1,46.0,42.1,42.0,34.0,33.0,and 32.0%,respectively,which were about 5-8 times higher than that obtained from the conventional culture mediums and techniques.This novel regeneration system could be helpful in wheat transformation.  相似文献   

14.
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   

15.
优良小麦转基因受体品种的筛选及成熟胚半胚培养的研究   总被引:1,自引:0,他引:1  
为了筛选具有良好组织培养特性的优良小麦品种作为转基因受体,使转基因小麦能尽快得到应用,对4个小麦品种的幼胚和成熟胚以及7个小麦品系的成熟胚进行离体培养,考察其组织培养特性.结果表明,11个品种(系)的成熟胚成愈率都达90%以上,但不同成熟胚来源的愈伤组织的植株再生率存在很大差异:7个小麦品系的植株再生率都低于20%,而4个小麦品种的植株再生率都达35%以上,幼胚成愈率及植株再生率都分别达90%和62%以上.该研究为小麦的遗传转化提供了几个新的优良受体品种.该研究进行成熟胚培养时,采用半胚培养的方式,一方面有效地克服了成熟胚在诱导培养基上直接萌发的现象,另一方面提高了成熟胚来源的愈伤组织分化为多苗的能力.该再生体系可作为小麦胚培养的参考.  相似文献   

16.
[目的]研究小麦离体培养的影响因素,探索小麦成熟胚愈伤组织诱导、继代、分化和植株再生的有效方法,建立一套成熟的植株再生体系,为进一步转基因研究奠定基础。[方法]采用河南的5个不同小麦品种,经小麦种子消毒,无菌取胚,然后接入诱导培养基进行愈伤组织诱导,愈伤组织再经继代培养、分化培养以至小麦植株再生。通过对它们浸种时间和成熟胚离体培养过程的观察,研究了不同预处理时间和植物激素,如2,4-D、ABA、KT、IAA和NAA,对小麦成熟胚愈伤组织在诱导、继代、分化和植株再生方面的一些影响。[结果]15h的浸种时间效果好;4.0mg/L2,4-D有利于愈伤组织形成;在继代培养基中添加0.3mg/LABA有利于小麦致密愈伤组织的诱导及再生能力的保持;KT和6-BA对提高芽的分化有显著作用;附加浓度1.5mg/LNAA和0.2mg/LIAA的1/2MS培养基可有效促进生根。[结论]浸种时间、基因型对小麦愈伤组织的继代、分化和再生有很大的影响,添加一定的外源激素有利于提高其植株的再生频率。  相似文献   

17.
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   

18.
小麦成熟胚愈伤组织诱导条件优化的研究   总被引:2,自引:0,他引:2  
吴美金  史文娟  王敏 《安徽农业科学》2008,36(16):6663-6665
[目的]筛选小麦成熟胚愈伤组织诱导的最适培养条件。[方法]采用正交设计试验,以2个小麦品种扬辐2号和皖麦41的成熟胚为外植体,研究不同基本培养基和激素配比对愈伤组织诱导的影响。[结果]在MS、1/2 MS、N63种基本培养基中,1/2 MS对小麦成熟胚愈伤组织诱导效果最好。IAA对扬辐2号成熟胚愈伤组织诱导有一定的影响,KT对皖麦41成熟胚愈伤组织诱导作用显著。1/2 MS+2,4-D4.0 mg/L,愈伤组织质量最好。不同小麦品种成熟胚离体培养力存在着差异,皖麦41优于扬辐2号。[结论]该研究为小麦成熟胚离体培养提供了参考。  相似文献   

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