共查询到19条相似文献，搜索用时 968 毫秒
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通过黑木耳菌株的ITS序列分析,对秦巴山区44个黑木耳菌株进行遗传多样性研究。采用CTAB法提取黑木耳菌株基因组DNA,进行PCR扩增,对扩增产物测序,并通过软件ClustalX 1.83和MEGA 5.0进行序列比对以及系统发育树的构建。结果表明:秦巴山区黑木耳菌株遗传多样性较丰富,部分菌株之间同源性较高,甚至可能为同一品种,当相似系数为0.002时,聚类为5个分支,其中耳268与其它菌株亲缘关系较远,为今后秦巴山区黑木耳菌株的遗传多样性及优良品种的遗传育种奠定了理论基础。 相似文献
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以商洛市主栽品种黑威15为对照,分离鉴定两株秦岭野生黑木耳菌株,并进行出耳试验,考察两株秦岭野生黑木耳菌株特性,为商洛市黑木耳品种选育、改良提供新的种质资源。结果：经分子生物学鉴定,采集的两株秦岭野生黑木耳菌株均为木耳属,黑木耳;出耳试验结果,丹凤野生黑木耳菌株比对照黑威15早熟、产量高、抗杂抗逆性强、耐高温,有望成为优良黑木耳菌株,缺点是颜色偏黄;山阳野生黑木耳菌株比对照黑威15产量低、抗杂抗逆性弱、不耐大水和高温,但其具有耳芽形成快、早、整齐,早熟,颜色黑的优点,可以用来作为杂交选育亲本。 相似文献
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《中国食用菌》2017,(4)
以河北省主栽的17个平菇品种为材料,对构建平菇种质分子身份证的方法进行探讨研究。首先应用CO1对平菇物种进行鉴定,然后利用SSR Locator软件从Pleurotus ostreatus PC15 v2.0全基因组序列上查找SSRs位点并设计引物,采用筛选后的SSR引物对供试菌株进行扩增,然后根据引物对不同菌株扩增产生的带型进行编码、组合,构建SSR分子身份证。结果显示,17个平菇品种包括4株糙皮侧耳(P.ostreatus)、8株白黄侧耳(P.cornucopiae)和5株肺形侧耳(P.pulmonarius)。从48对SSR引物中筛选出9对引物,在17个平菇品种间共检测到53种带型,将不同带型赋值编码后组合成17个平菇品种的特异分子身份证。该研究表明CO1结合SSR标记技术可有效地用于平菇种质分子身份证的构建。 相似文献
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以黑木耳1703为供试菌株，采用单因素试验，研究碳源、碳源质量浓度、氮源、氮源质量浓度、接种量、培养基初始pH、摇床转速对黑木耳菌丝体生物量的影响；用正交试验研究葡萄糖、蛋白胨和培养基初始pH对菌丝体生物量的影响。结果表明，葡萄糖、蛋白胨、培养基初始pH对菌丝体生物量影响显著，液体发酵的最佳条件：葡萄糖20 g/L，蛋白胨3 g/L，培养基初始pH为6，接种量为8%，摇床转速为150 r/min。结果为黑木耳1703液体菌种的培养应用提供参考。 相似文献
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不同地域柳松菇菌株遗传多样性的初步研究 总被引：4，自引：0，他引：4
应用同工酶技术和RAPD技术对7个来源于不同地域的柳松菇菌株进行了遗传多样性分析，两种方法的分析 结果基本一致。结果表明，地域差异对柳松菇菌株之间的遗传差异有明显影响，不同地域中分布的柳松菇菌株有丰富的遗传多样性。该研究为柳松菇的杂交亲本选配提供了实验依据，也为进一步研究柳松菇种质资源的遗传多样性提供了方法学上的参考。 相似文献
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以NCBI核酸数据库中五味子DNA序列为研究对象,采用MEGA 6.0和DnaSP6软件分析法,研究了ITS2、PEPC、trnH-psbA和matK 4个目标片段的序列特征,以期获得五味子的遗传多样性和种质资源的来源。结果表明:ITS2序列的变异位点最多为15个;PEPC序列的单倍型最多为11个;最大遗传距离在ITS2序列之间为0.046;PEPC序列具有最高单倍型多样性为0.985,ITS2序列具有最高核苷酸多态性为0.004 93,所有序列的转换/颠换值均小于2;且4种序列构建的邻接法系统树结果均可以分为3个主要分支。 相似文献
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缘盖牛肝菌纯培养菌种的RAPD和ITS分子标记鉴定 总被引：1，自引：2，他引：1
Boletus appendiculatus(Schoeff:Fr.)Secretanis an ectomycorrhizal fungus normallyassociated withPinus taiwanensisandPinusdensiflora,andis distributed inP.taiwanensisforests or in mixed forests consisting mainly ofP.taiwanensisat elevations between800to1300… 相似文献
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Internal transcribed spacer (ITS) sequences of four edible and medicinal fungi belonging to the Russulaceae, collected from the Lishui mountainous area of Zhejiang Province, were cloned and sequenced. Comparisons with sequence data in GenBank were undertaken using BLAST, and the four ITS sequences, together with 15 reference sequences obtained from GenBank, were used to construct a phylogenetic tree. rDNA ITS sequences of the four strains ranged from 673 to 766 bp in length and between 47.4% and 49.48% in GC content. Phylogenetic data indicated strain R57 to be Russula cyanoxantha. Differences in the size and GC content of ITS sequences from strains R32 and R57 (R. cyanoxantha) and strain L37 (Lactarius sanguifluus) were significant, whereas the corresponding differences between strains R32 and R57 were relatively small. A close kinship, with only small detectable differences in their respective ITS sequences, existed between R. mustelina, R. virescens and R. parazurea. A similar situation applied to strains of L. sanguifluus and L. salmonicolor. 相似文献
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基于ITS序列分析探讨我国栽培凤尾菇的分类地位 总被引：5，自引：1，他引：4
针对我国栽培凤尾菇(Pleurotus sajor-caju)及其近缘种共10个菌株的ITS序列,应用特异引物进行PCR扩增,对其产物进行测序,并从GenBank上下载侧耳属(Pleurotus)3个种7条ITS序列、韧伞属(Lentinus)的4条ITS序列和香菇属(Lentinula)的3条ITS序列,以冬虫夏草(Cordyceps sinensis)和蛹虫草(Cordyceps militaris)为外类群,用NJ(Neighbor-joining)法构建系统发育树,结果表明:凤尾菇在侧耳属分支上与侧耳属内种的相似性达98.5%以上,韧伞属和香菇属的属内相似性也均为98%以上,而侧耳属和韧伞属、香菇属的属间相似性仅约80%,故凤尾菇应归于侧耳属;在进一步研究中,将该凤尾菇与其近缘种的ITS1-5.8S-ITS2序列作碱基完全比对,结果发现它与肺形侧耳(Pleurotus pulmonarius)的碱基完全一致,而与其它近缘种均存在较大碱基差异,因此,目前我国广泛栽培的凤尾菇与肺形侧耳可能是同物异名种,建议订正其名称,将其拉丁名统一为P. pulmonarius.本研究首次将ITS序列分析和碱基比对结合对凤尾菇的分类地位及拉丁名进行研究,结果表明ITS序列分析在近缘种的分类鉴定上很有价值. 相似文献
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收集并采集黑木耳(Auricularia auricula-judae)野生菌株与主栽品种23份,以设计的10对SSR引物对其遗传多样性进行分析。结果表明,10对引物对23个菌株扩增的多态性信息含量在0.050~0.320,均值为0.216,Shannon信息指数0.100~0.690,均值0.455,引物MR005扩增效果最好,多态性最为丰富。对黑木耳23个菌株的聚类分析表明,北方地区黑木耳主栽品种与野生菌株可划分为4类,大部分主栽品种和野生菌株聚到了第三大类群(主栽类群),说明北方地区黑木耳栽培品种与野生菌株间遗传背景差异不大。 相似文献
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Ghada Baraket Olfa Saddoud Khaled Chatti Messaoud Mars Mohamed Marrakchi Mokhtar Trifi Amel Salhi-Hannachi 《Scientia Horticulturae》2009
Sequences of the internal transcribed spacers (ITSs) of nuclear ribosomal DNA (nrDNA) were analysed in a set of Tunisian fig (Ficus carica L.) cultivars. The size of the spacers sequences ranged from 200 to 279 bases for ITS1 and from 253 to 314 bases for ITS2. Variation of GC contents has been also observed and scored as 59–68% and 55–68% for ITS1 and ITS2, respectively. This data exhibited the presence of polymorphism among cultivars. The intra-specific variability level of the ITS sequences proved a variation both in the length and in the sequences studied. In fact, ITS1 and ITS2 sequences were considered as a useful tool to establish genetic relationships among cultivars. Our results indicate that the diversity detected among closely related genotypes supported strongly the efficiency of ITS sequences for establishing relationships between cultivars. ITS2 seems to be relatively more informative than ITS1 regarding length or GC contents. Considerable genetic diversity was observed among fig at intra and inter-cultivars levels. Two polyclonal varieties were identified. In addition, data proved that a typically continuous genetic diversity characterizes the local fig germplasm. The topology of the derived dendrogram strongly supported this assumption. In fact, genotypes are clustered independently from their geographical origin or the sex of trees suggesting a narrow genetic basis among the ecotypes studied in spite of their phenotypic distinctiveness. Implications of these results for management of fig germplasm collections are discussed. 相似文献
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采用组织分离法对黑木耳菌丝生长期竞争性杂菌病害病原菌进行了分离纯化,通过传统形态学方法和ITS序列分析技术进行菌种鉴定,并对其生物学特性进行初步研究。结果表明,该菌经形态学和分子生物学鉴定确定为拟青霉属真菌(Paecilomyces formosus),尚未见其他有关该菌危害黑木耳生产的报道。菌种生物学特性研究表明,该菌菌丝生长的适宜温度范围为30℃~35℃,最适温度35℃;在培养基pH 6~9条件下,菌丝均生长良好,偏酸性条件下菌丝生长略优于碱性条件。 相似文献