共查询到20条相似文献，搜索用时 328 毫秒
1.
《分子植物育种》2016,(11)
本研究采用Illumina高通量测序技术对3种不同倍性的桤木属植物混合样品进行转录组测序,利用生物信息学方法开展基因表达谱的研究、功能基因的预测。测序结果组装获得85 769个Unigene,总长50 200 910 bp,功能注释到NR、NT、Swiss-Prot、KEGG、COG、GO库的Unigene分别是45 172、38 673、29 181、25 096、14 968和30 675个,所有注释上的Unigene是48 204个。根据KEGG pathway数据库,对桤木转录组的Contig进行pathway生物学通路的注释和预测,共识别出25 096个Unigene具有对应的功能,并关联到128条生物学通路。SSR查找发现,从85 769个Unigene中找到8 678个SSR位点,占Unigene总数的比例为10.11%。其中,二核苷酸重复所占比例最高,达到65.87%,其次是三核苷酸重复,为28.36%,四、五、六核苷酸重复类型的数量很少,总计5.77%。SSR不同重复单元类型中,出现频率最高的为AG/CT,其次是AAG/CTT和AT/AT。 相似文献
2.
为了开发马尾松SSR标记,本研究利用MISA软件对马尾松转录组测序获得的148 186条Unigene (序列总长约91 449.7 kb)进行全面分析,共搜索获得6 611个SSR位点,分布在6 003条Unigene上,SSR发生频率为4.05%,平均每13.83 kb出现1个SSR,结果发现单核苷酸重复出现的频率占总SSR的53.60%;二核苷酸为23.46%;三核苷酸为21.33%。通过对含SSR的Unigene的GO分析,显示生物过程包含的Unigene占40.60%;细胞组分包含的Unigene占35.45%,分子功能包含的Unigene占23.95%;转录组中有724个Unigene可被注释到110个KEGG通路中,其中被注释到新陈代谢的Unigene最多有312个,其次是遗传信息处理类有183个。根据含SSR的Unigene序列共设计了4 247对SSR引物,并随机挑选30对SSR引物进行PCR扩增验证,其中12对引物能够扩增出目标条带,引物的有效性为40%。本研究结果表明,马尾松转录组测序获得的Unigene序列可作为SSR标记开发的有效来源,所开发的SSR标记为马尾松的遗传图谱构建、分子标记辅助育种等研究提供丰富可靠的标记。 相似文献
3.
为了解白掌株型突变的转录组序列功能和SSR位点分布特征,并探索与株型关联的SSR位点信息。以对照‘美酒’及其小株型突变体为材料,选取叶片、叶柄、佛焰苞片、苞梗组织进行高通量PE150的转录组测序和序列筛选;开展unigene的GO、KOG、KEGG功能注释及分类;开展SSR位点筛选及批量设计引物;发掘差异表达含SSR位点unigene的GO、KEGG富集功能信息。结果显示,白掌转录组共筛选127 153个unigene,其中有41 370个获注释,包含GO注释25 925个、KO注释12 727个、KOG注释21 487个;从18 636个unigene中发掘出28 046个SSR位点,出现频率22.06%,包含有193种重复基序,其中以二核苷酸AG/CT(14 305, 51.01%)、AC/GT (3 907, 13.93%)、AT/AT (2 322, 8.28%)和三核苷酸AAG/CTT (2 087, 7.44%)居多,基序重复次数以5～10次重复占优势;从18 636个unigene中筛选17 070个批量设计出51 210对SSR引物,有效扩增和多态性好。差异转录组结合S... 相似文献
4.
《分子植物育种》2020,(12)
本研究利用Illumina HiSeq~(TM)2000对马蓝转录组进行高通量测序,使用软件MicroSAtellite (MISA)分析转录组中的SSR位点信息。通过组装马蓝转录组数据获得了51 381条Unigene,并对获得的Unigene进行SSR检测,共检测到8 471个SSR位点,其分布在6 782条Unigene中,出现的频率为16.49%。SSR中以二核苷酸和三核苷酸重复类型为主,其中二核苷酸以重复单元AT/TA为主,占18.14%,其余类型的重复单元相对较少。SSR所在序列功能注释结果显示在Nr和SwissProt中分别有5 932和4 285条序列被注释,同时SSR所在序列还被注释到47个GO分类,25个KOG分类和29个KEGG代谢通路中。通过设计、筛选,共获得5 819对引物组合,随机挑选的18对引物中有13对引物扩增出符合预期大小的条带。马蓝SSR出现的频率高,重复种类丰富,为研究马蓝遗传多样性、基因定位和品质改良等提供了科学依据。 相似文献
5.
《分子植物育种》2020,(16)
利用Illumina NovaSeq 6000对云南栘(木衣)进行高通量转录组测序,使用MIcro SAtellite identification tool (MISA)分析转录组中SSR位点分布类型与特征。组装获得云南栘(木衣) 111 655条Unigene,并搜索检测到32 360个SSR位点,出现频率为28.98%,分布平均距离为3.76 kb。其中以二核苷酸所占比例最高(46.75%),其次是单核苷酸(34.70%)和三核苷酸(17.10%)。在单核苷酸的重复类型中,A/T重复基元占有较大比例(33.01%);二核苷酸各重复类型所占比例差距较大,分别为:AG/CT (39.76%)AT/TA (3.71%)AC/GT(3.20%)CG/CG (0.09%);三核苷酸各重复类型及其所占比例依次为AAG/CTT (4.52%)、AGG/CCT (3.51%)、ACC/GGT (2.33%)、AGC/CTG (2.28%)和ATC/ATG (1.20%),而AAC/GTT、AAT/ATT、ACG/CGT、ACT/AGT、CCG/CGG基元所占比例较低。在云南栘(木衣)转录组中,由于云南栘(木衣) SSR具有高出现频率,高重复类型和高多态性,为其SSR开发和遗传多样性分析等研究提供科学的数据参考。 相似文献
6.
利用生物信息学方法对NCBI公共数据库的1 458条三浅裂野牵牛ESTs序列进行EST-SSRs信息特征分析。结果显示,剔除低质量的和冗余的序列后,得到总长度为334.368 kb无冗余序列868条。这些无冗余序列中有35个微卫星简单重复序列(Simple sequence repeat,SSR),分布于35条EST中,出现频率为4.03%,平均分布距离为9.55 kb。在2～6核苷酸的重复类型中,二、三核苷酸SSR之和占总EST-SSR的68.57%,其中三核苷酸SSR占总SSR数量的45.71%。在所有重复单元中,所占比例最高的是AT/AT(14.29%),其次是TCT/AGA为11.43%,TAA/TTA为8.57%列第3位。在所有的SSR中,EST-SSRs重复次数5次的有13个,占全部SSR的37.14%,其次是重复次数为4次和7次,各有5个,占全部SSR的14.29%。结果说明,甘薯近缘野生种三浅裂野牵牛的EST-SSR出现频率较高、类型丰富、具有一定的研究利用价值。 相似文献
7.
苦荞种皮转录组SSR位点信息分析及其分子标记的开发 总被引：2，自引：0，他引：2
《分子植物育种》2020,(18)
为开发苦荞新的SSR标记,本研究利用MISA软件对苦荞种皮转录组测序数据进行SSR位点信息搜索,利用Primer 3设计引物并随机选择53对引物进行验证。结果表明:苦荞种皮转录组数据库中共搜索到9 094个SSR位点,其中,单核苷酸、三核苷酸和二核苷酸重复类型占优势,占总SSR的63.99%、19.35%、15.49%;共发现70种重复基元,其中A/T、AT/AT、AAG/CTT基元是优势基元。设计合成的53对引物中,41对引物(77.36%)获得有效扩增,21对引物具有多态性。本研究从转录组序列中大规模开发的SSR分子标记将有助于苦荞遗传多样性与分子育种研究。 相似文献
8.
山东栒子是中国山东省的特有种,现已处于极度濒危状态。目前,山东栒子的分子生物学研究较少,基因数据库资源极度缺乏,急需探究其生物学遗传信息,以加快对山东栒子的保护遗传学工作。本研究以山东栒子叶片、花、成熟果实为实验材料,利用PacBio Sequel测序平台对其转录组进行全长转录组测序。共得到高质量去冗余的转录本53932个,作为最终转录本序列。预测到的CDS区共52490个;对其SSR位点进行分析,对测序得到Unigenes进行单核苷酸至六核苷酸重复的SSR位点搜索,共搜索到26796个SSR位点。对非冗余转录本利用BLAST软件与NR、Swissprot、GO、COG、KOG、KEGG 6个数据库进行比对,一共成功注释了53319个Unigenes,其中与NR数据库进行比对中注释为苹果的的相关基因数量最多,其次是白梨和桃;在GO数据库中有33305条山东栒子Unigenes被注释分类,由生物学过程、细胞成分和分子功能三部分组成;在与COG数据库比对中,共有23910条比对到了同源序列,且一共被分为25类;在与KEGG数据库的一系列比对中,可将Unigenes映射到126条代谢通路中。本研究在高通量全长转录组水平对山东栒子进行了系统研究,这为进一步开展山东栒子的分子标记开发和挖掘优良基因提供了科学依据,从而推动山东栒子的保护与利用。 相似文献
9.
为了深入了解文冠果转录组的整体水平及脂肪酸合成与代谢相关功能基因的表达情况,本研究以文冠果根、茎、叶、花为材料利用Pacific Biosciences RS II平台测序技术进行测序及生物信息学相关分析。平台共获得原始数据7.64 Gb,生成110 584个转录本,平均长度为1.9 kb。对所有转录本在NR、SwissProt、KEGG、KOG、GO、NT、pfam数据库进行注释和功能分类,结果共得到102 118个注释基因,占比92.34%。共有351个参与脂肪酸生物合成和120个参与脂肪酸延长的Unigene,分别编码15个脂肪酸生物合成和7个脂肪酸延长的关键酶。同时在110 584条Unigene中分析发现了94 906个SSR位点,单核苷酸重复频率最高(68.29%),并预测了6 059个转录因子(TFs)。与第二代测序(Roche 454 de novo)结果相比,PacBio平台所得到的转录本更长,转录本注释率也得到提高。本研究为文冠果的下一步分子生物学研究提供了较为可靠的转录组数据。 相似文献
10.
《分子植物育种》2017,(6)
为开发西红花转录组SSR标记,利用MISA软件筛选了西红花球茎转录组测序获得的29 572条Unigenes,对其SSR信息进行分析;利用Primer 3.0软件设计SSR引物,并随机选取30对SSR引物对6个西红花品种进行SSR引物筛选及多态性分析。结果发现,在西红花转录组中共搜索到个7 804个SSR位点,分布于6 306条Unigenes,SSR发生频率为18.73%,平均每5.85 kb含有1个SSR;SSR重复基元中单核苷酸重复出现频率最高,占总SSR的47.83%,其次为三核苷酸(32.94%)和二核苷酸重复(17.41%);二核苷酸重复基元以AG/CT为主(86.68%),三核苷酸重复基元以AAG/CTT为主(24.43%)。利用Primer 3.0软件共设计出11 508对候选引物,随机选择30对引物对6个西红花品种进行SSR引物筛选及多态性分析。30对引物均能扩增出预期大小的条带,有效扩增效率为100%,30对引物在6份西红花品种间未表现出多态性。本研究开发的SSR标记可为西红花遗传图谱构建、抗病虫及抗逆功能基因定位、分子标记辅助育种及西红花遗传多样性分析等提供丰富的候选标记。 相似文献
11.
Jens Jensen 《Euphytica》1979,28(1):47-56
Summary The high-lysine gene in Risø mutant 1508 conditions an increased lysine content in the endosperm via a changed protein composition, a decreased seed size, and several other characters of the seed. The designation lys3a, lys3b, and lys3c, is proposed for the allelic high-lysine genes in three Risø mutants, nos 1508, 18, and 19. Linkage studies with translocations locate the lys3 locus in the centromere region of chromosome 7. A linkage study involving the loci lys3 and ddt (resistance to DDT) together with the marker loci fs (fragile stem), s (short rachilla hairs), and r (smooth awn) show that the order of the five loci on chromosome 7 from the long to the short chromosome arm is r, s, fs, lys3, ddt. The distance from locus r to locus ddt is about 100 centimorgans. 相似文献
12.
G. H. Kroon 《Euphytica》1994,76(1-2):125-125
Summary
K x vadensis is a hybrid of K. blossfeldiana and K. marmorata obtained after doubling the number of chromosomes. 相似文献
13.
Hongyan WEI Jian ZHOU Jinguang LU Jingzheng SONG Qiongxi YU Zhihong JIANG 《Medicinal Plant》2019,(6):27-29
[Objectives]This study aimed to establish a QAMS(quantitative analysis of multi-components by single-marker)method for simultaneous determination of four phenol... 相似文献
14.
Summary Avoidance of rust fungi that was based on poor appressorium induction was previously found in Hordeum chilense. In the present study 95 accessions of Triticeae were screened for avoidance of Puccinia hordei. The percentage of appressorium formation per germinated spore ranged from 6 to 90%. On none of the 41 accessions of Aegilops, Agropyron, Elymus, Secale, Thinopyrum or Triticum studied was the rate of appressorium formation lower than 25%. Lower rates of appressorium formation were, however, found on accessions of wild barley species Hordeum brachyantherum, H. marinum, H. parodii and H. secalinum. Its implications in cereal breeding are discussed. 相似文献
15.
D. A. Bond G. J. Jellis G. G. Rowland J. Le Guen L. D. Robertson S. A. Khalil L. Li-Juan 《Euphytica》1993,73(1-2):151-166
Progress is being made, mainly by ICARDA but also elsewhere, in breeding for resistance to Botrytis, AScochyta, Uromyces, and Orobanche; and some lines have resistance to more than one pathogen. The strategy is to extend multiple resistance but also to seek new and durable forms of resistance. Internationally coordinated programs are needed to maintain the momentum of this work.Tolerance of abiotic stresses leads to types suited to dry or cold environments rather than broad adaptability, but in this cross-pollinated species, the more hybrid vigor expressed by a cultivar, the more it is likely to tolerate various stresses. 相似文献
16.
Chunli TANG Fengxian ZHAO Hongxia CHEN Jiabao MA Jiangcun WEI Meiyan QIU Zhen XIE 《Medicinal Plant》2019,(6):60-65
[Objectives]To optimize the water extraction process of Chinese Herbal Compound Man Gan Ning and establish a method for its extraction and content determination... 相似文献
17.
Mohammed Riyazaddin Polavarapu B. Kavi Kishor Are Ashok Kumar Belum V. S. Reddy Rajendra S. Munghate Hari C. Sharma 《Plant Breeding》2015,134(4):423-436
Sorghum shoot fly, Atherigona soccata, is one of the important pests of postrainy season sorghums. Of the 90 sorghum genotypes evaluated for resistance to this pest, RHRB 12, ICSV 713, 25026, 93046 and 25027, IS 33844‐5, Giddi Maldandi and RVRT 3 exhibited resistance in postrainy season, while ICSB 463, Phule Anuradha, RHRB 19, Parbhani Moti, ICSV 705, PS 35805, IS 5480, 5622, 17726, 18368 and 34722, RVRT 1, ICSR 93031 and Dagidi Solapur showed resistance in rainy season, suggesting season‐specific expression of resistance to A. soccata. ICSB 461, ICSB 463, Phule Yasodha, M 35‐1, ICSV 700, 711, 25010, 25019 and 93089, IS 18662, Phule Vasudha, IS 18551 and 33844‐5 and Barsizoot had fewer deadhearts than plants with eggs across seasons, suggesting antibiosis as one of the resistance mechanism. Five genotypes exhibited resistance with high grain yield across seasons. Correlation, path and stepwise regression analyses indicated that leaf glossiness, seedling vigour, trichome density, oviposition and leaf sheath pigmentation were associated with the expression of resistance/susceptibility to shoot fly, and these can be used as marker traits to select and develop shoot fly‐resistant sorghums. 相似文献
18.
E. Keep 《Euphytica》1986,35(3):843-855
Summary Cytoplasmic male sterility (cms) is described in the F1 hybrids Ribes × carrierei (R. glutinosum albidum × R. nigrum) and R. sanguineum × R. nigrum. In backcrosses to R. nigrum, progenies with R. glutinosum cytoplasm were either all male sterile, or segregated for full male fertility (F) and complete (S) and partial (I) male sterility. Ratios of F:I+S suggested that two linked genes controlled cms, F plants being dominant for one (Rf
1) and recessive for the other (Rf
2).Segregation for cms in relation to three linded genes, Ce (resistance to the gall mite, Cecidophyopsis ribes), Sph
3(resistance to American gooseberry mildew, Sphaerotheca mors-uvae) and Lf
1(one of two dominant additive genes controlling early season leafing out) indicated that Rf
1and Rf
2were in this linkage group. The gene order and approximate crossover values appeared to be: % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXafv3ySLgzGmvETj2BSbqef0uAJj3BZ9Mz0bYu% H52CGmvzYLMzaerbd9wDYLwzYbItLDharqqr1ngBPrgifHhDYfgasa% acOqpw0xe9v8qqaqFD0xXdHaVhbbf9v8qqaqFr0xc9pk0xbba9q8Wq% Ffea0-yr0RYxir-Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dme% aabaqaciGacaGaamqadaabaeaafaaakeaacaWGdbGaamyzamaamaaa% baGaaiiiaiaacccacaGGWaGaaiOlaiaacgdacaGG0aGaaiiiaiaacc% caaaGaaiiiaiaacccacaGGGaGaamOuaiaadAgaliaaigdakmaamaaa% baGaaiiiaiaacccacaGGGaGaaiiiaiaaccdacaGGUaGaaiOmaiaacs% dacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaaaacaWGsbGaamOzaSGa% aGOmaOWaaWaaaeaacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaiaacc% cacaGGGaGaaiiiaiaacccaaaGaamitaiaadAgaliaaigdakmaamaaa% baGaaiiiaiaacccacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaiaacc% cacaGGGaGaaiiiaiaacccacaGGGaaaaiaadofacaWGWbGaamiAaSGa% aG4maaaa!6E4D!\[Ce\underline { 0.14 } Rf1\underline { 0.24 } Rf2\underline { } Lf1\underline { } Sph3\]. Crossover values of 0.36 for Ce-Lf
1, and 0.15 for Lf
1-Sph
3were estimated from the relative mean differences in season of leafing out between seedlings dominant and recessive for Ce and Sph
3.It is suggested that competitive disadvantage of lf
1-carrying gametes and/or zygotes at low temperatures may be implicated in the almost invariable deficit of plants dominant for the closely linked mildew resistance allele Sph
3. Poor performance of lf
1- (and possibly lf
2-) carrying gametes and young zygotes during periods of low temperature at flowering might also account for the liability of some late season cultivars and selections to premature fruit drop (running off). 相似文献
19.
[Objectives] To determine the optimum extraction technology for total phenols of leaves in Acanthopanax giraldii Harms.[Methods]The single factor test and ortho... 相似文献
20.
Summary Apple and pear pollen was irradiated with doses of 0, 50, 100, 250 and 500 krad (gamma rays) and stored at 4°C and 0–10% r.h. From the in-vitro germination percentages an average LD 50 dose of about 220 krad was estimated. For both irradiated and untreated pollen a close and corresponding lineair relationship existed between germination percentage and pollen tube growth.Irradiated pollen was much more sensitive to dry storage conditions than untreated pollen, resulting in less germination and more bursting. Apparently, irradiation caused the pollen cell membrane to lose its flexibility faster than normal. Rehydration of dry-stored, irradiated pollen in water-saturated air restored germination percentages up to their initial levels. The importance of this procedure in germination trials is stressed. 相似文献