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奉化大芋艿脱毒苗的组培快繁研究 总被引:2,自引:0,他引:2
组织培养试验表明,培养在MS 6-BA 2 mg/L NAA 0.2 mg/L上的奉化大芋艿茎尖,不定芽诱导率可达75%,月增殖系数为4倍。若在上述培养基中添加芋头汁、椰子汁等有机物则可实现不定芽继代繁殖和诱导生根一步完成,0.5~1 mg/L的三十烷醇在壮苗过程中的应用进一步提高了芋苗的根数、根长、苗高和鲜重。 相似文献
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青海省处于高原的高寒冷山区,日照时间较长、昼夜温差较大,属于高产优质脱毒马铃薯的适种地区。通过介绍马铃薯脱毒技术的研究情况,指出了具体的推广对策。 相似文献
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莲藕是重要的经济作物,用途广泛,主要以块茎进行无性繁殖。以常规法繁育,不仅繁殖率低,用种量大;而且由于病毒病等病害易发生,从而严重影响了莲藕的产量和品质。为此,莲藕脱毒快繁的研究应运而生。本文就莲藕的茎尖培养及生长点脱毒培养的研究及前景预测作了综述。 相似文献
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蓖麻在逆境胁迫下的抗性及耐性机制研究进展 总被引:4,自引:1,他引:4
蓖麻由于其高经济价值及生态效益具有广阔的开发利用前景。综述了蓖麻在盐碱、旱涝及重金属等逆境胁迫下的抗逆适应性及耐性机理。并对其应用前景进行展望。 相似文献
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茶树是中国重要的经济作物,自60年代以来,茶树育种一直是中国茶树研究工作的重点。为了给茶树育种工作提供新的种质资源,取得育种工作的突破性进展,国内外广泛开展了关于其多倍体育种的研究。笔者从多倍体的获得和鉴定方法两方面综述了茶树多倍体育种技术的研究进展,提出要加强多倍体诱导效率和新型诱导剂的研究,指出嵌合体是目前多倍体育种中普遍遇到的问题,茶树离体再生频率及遗传转化体系的构建,对于茶树嵌合体的分离及茶树多倍体离体诱导技术的建立具有重要意义。并分析了茶树多倍体研究的优点和未来发展前景。 相似文献
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种子是种子植物所特有的有性繁殖器官.种子的结构一般由胚、胚乳和种皮三部分组成.从来源上讲,自然界中正常的植物种子分为两类:一类是植物经过受精作用后由胚珠发育形成的;另一类是植物不经过受精作用由不定胚直接发育形成的.人工种子是Murashige于1978年在国际园艺植物学术讨论会上首先提出的,它是指将植物离体培养中产生的体细胞胚或能发育成完整植株的分生组织(芽、愈伤组织、胚状体等)包埋在含有营养物质和具有保护功能的外壳内形成的在适宜条件下能够发芽出苗的颗粒体.完整的人工种子包括体细胞胚、人工胚乳和人工种皮. 相似文献
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Biofortification of taro (Colocasia esculenta) has never been studied. The aim of the present study is to compare the chemical compositions and individual constituent contents for major compounds (starch, sugars, cellulose, proteins, minerals), carotenoids and anthocyanins between parents and hybrids selected first for their agronomic performance and second for their corm characteristics (flesh color, quality and taste). For major compounds, 45 selected hybrids were compared to 66 cultivars and for carotenoids and anthocyanins, 34 selected hybrids were compared to 79 cultivars. Total sugars, cellulose and mineral contents presented moderate increases in hybrids. Carotenoids and anthocyanins contents were not correlated with corm flesh colors, most likely in relation with the wide range of the observed variability. Anthocyanin contents could not be increased in the selected hybrids, while total carotenoid contents were increased by more than fourfolds. The results of this study indicate that carotenoid contents can be rapidly improved by selecting plants of good agronomic performance and corm shape with increased density of yellow and orange colors. Potential applications to taro breeding programs are discussed. 相似文献
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Forty-four taro (Colocasia esculenta), two tanier (Xanthosoma species) and one Colocasia gigantea accessions were evaluated
for genetic diversity using random amplified polymorphic DNA (RAPD) primers. Seventy-three of 112 primers amplified PCR DNA
products used to fingerprint the accessions. Thirty-two primers were considered highly informative because they amplified
more than 5 bands or amplified one or more polymorphic bands that distinguished between accessions. RAPDs showed high genetic
diversity in taro accessions from Indonesia, were capable in distinguishing between Hawaiian accessions, and could separate
triploid from diploid accessions. UPGMA cluster analysis of genetic similarity estimates (Jaccard's coefficient), separated
the accessions into 3 main groups with C. esculenta divided into 5 subgroups. These primers will be useful for future genetic
analysis and provide taro breeders with a genetic basis for selection of parents for crop improvement. Polymorphic markers
identified in the DNA fingerprinting study will be useful to screen a segregating population which is being generated in our
laboratory aimed at developing a taro genetic linkage map.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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随着马铃薯资源研究不断深入,档案工作也有新的内容,根据我国马铃薯种质资源档案工作的具体内容,介绍了马铃薯种质资源档案工作的建设与进展。 相似文献