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Saccharum; amplified fragment length polymorphism; breeding programs; clones; cluster analysis; genetic markers; genetic similarity; genetic variation; hybrids; phylogeny; random amplified polymorphic DNA technique; restriction fragment length polymorphism; sugarcane; taxonomy
Abstract:
... Amplified fragment length polymorphism (AFLP) markers were evaluated for determining the phylogenetic relationships, and the diversity in the Saccharum complex using 30 clones belonging to S. officinarum, S. robustum, S. spontaneum, S. barberi, S. sinense and the related genus Erianthus. The phenetic tree of the species clones based on AFLP data was consistent with the known taxonomical relationsh ...
... A polyphasic, culture-independent study was conducted to investigate the abundance and population structure of ammonia-oxidizing bacteria (AOB) in canal sediments receiving wastewater discharge. The abundance of AOB ranged from 0.2 to 1.9% and 1.6 to 5.7% of the total bacterial fraction by real-time PCR and immunofluorescence staining, respectively. Clone analysis and restriction endonuclease anal ...
... Common wheat (Triticum aestivum L., 2n = 6x = 42) is a polyploid species possessing one of the largest genomes among the cultivated crops (1C is approximately 17 000 Mb). The presence of three homoeologous genomes (A, B and D), and the prevalence of repetitive DNA make sequencing the wheat genome a daunting task. We have developed a novel 'chromosome arm-based' strategy for wheat genome sequencing ...
... To overcome the shortcomings of universal 16S rRNA gene primers 8F and 907R when studying the diversity of complex microbial communities, the 3' termini of both primers were replaced with inosine. A comparison of the clone libraries derived using both primer sets showed seven bacterial phyla amplified by the altered primer set (8F-I/907R-I) whereas the original set amplified sequences belonging al ...
proanthocyanidins; developmental stages; plant-insect relations; herbivores; clones; plant age
Abstract:
... Developmental changes in plant structure and function can influence both mammalian and arthropod feeding preferences for many woody plant species. This study documents age-related changes that occur in the leaf chemistry of trembling aspen (Populus tremuloides Michx., Salicaceae) and discusses implications for the herbivore community and ecosystem processes. We collected leaves from replicate rame ...
... Standardisation of microsatellite allele profiles between laboratories is of fundamental importance to the transferability of genetic fingerprint data and the identification of clonal individuals held at multiple sites. Here we describe two methods of standardisation applied to the microsatellite fingerprinting of 429 Theobroma cacao L. trees representing 345 accessions held in the worlds largest ...
... A cDNA library was constructed from late log-phase cultures of the ichthyotoxin-producing haptophyte, Prymnesium parvum. Approximately 6,300 single-pass 5′ nucleotide sequences (out of nearly 8,000 randomly isolated clones) achieved length and quality criteria for incorporation into an expressed sequence tag (EST) database. Collectively, 3,415 unique genes (tentative unigenes [TUGs]) were assemble ...
... Cryptomeria japonica D. Don is one of the most important forest trees in Japan, but more than 10% of the Japanese population is allergic to its pollen. We constructed a cDNA library derived from pollen grains of C. japonica and performed an analysis of expressed sequence tags (ESTs). We obtained partial sequences from 1929 clones, which represented 1365 unique transcripts. Among the unique transcr ...
... Five hundred and six EST-derived markers, 313 SSR markers and 26 BAC end-derived or SCAR markers were anchored by PCR on a subset of a Cabernet Sauvignon BAC library representing six genome equivalents pooled in three dimensions. In parallel, the 12,351 EST clusters of the grapevine UniGene set (build #11) from NCBI were used to design 12,125 primers pairs and perform electronic PCR on 67,543 nonr ...
... The tprK gene in the syphilis spirochete, Treponema pallidum subsp. pallidum, undergoes antigenic variation in seven variable (V) regions. tprK is highly variable within T. pallidum strains, and a method has been developed to derive clones of T. pallidum that express a single, unique tprK sequence. Rabbits were infected with three different T. pallidum clones or the parent strain from which the cl ...
Saccharum spontaneum; adverse effects; clones; crossing; flowering; flowers; genotype; pollen; solar radiation; subtropics; sugarcane; temperature
Abstract:
... Four hours extra dark treatment in artificially made photoperiodic chamber induced early flowering in flowering clones i.e. S. 55/99, S. 187/91,S. 301/86, S. 116/2K.S. 73/89 after 12to 14th weeks. Maximum and minimum temperature ranged from 31.0 and 21.4°C respectively. Control plants of respective genotypes flowered generally after one month of the treated plants. Flowered genotypes in photoperio ...
... The relative abundance of bacteria in the mucus and crushed tissue of the Mediterranean coral Oculina patagonica was determined by analyses of the 16S rRNA genes of isolated colonies and from a 16S rRNA clone library of extracted DNA. By SYBR gold staining, the numbers of bacteria in mucus and tissue samples were 6.2 x 10⁷ and 8.3 x 10⁸/cm² of coral surface, respectively, 99.8% of which failed to ...
... We surveyed the diversity of soil Archaea across a large scale elevational gradient of ecosystem types, from foothills forest to alpine tundra in the Front Range of the Rocky Mountains. We used a dilution technique to sequence the single most abundant archaeal 16S rDNA sequence in each of the 40 soil cores distributed across the gradient to compare our results to those of typical 16S clone library ...
gas exchange; drought; carbon; seasonal variation; carbon dioxide; hybrids; stomatal conductance; stems; isotopes; dry matter accumulation; clones; water stress; photosynthesis; Populus; forest trees; net assimilation rate; tree growth; water use efficiency; flood irrigation; genetic variation; Spain
Abstract:
... Seasonal changes in carbon isotope discrimination (Δ) and gas exchange traits were assessed in four Populusxeuramericana clones differing in growth potential. Measurements were made during the second year after establishment in the field under two watering regimes, which were defined by the time-span between flood irrigations, hence resulting in different dry-down cycles: high irrigation (conserva ...
... The white petals of chrysanthemum (Chrysanthemum morifolium Ramat.) are believed to contain a factor that inhibits the accumulation of carotenoids. To find this factor, we performed polymerase chain reaction-Select subtraction screening and obtained a clone expressed differentially in white and yellow petals. The deduced amino acid sequence of the protein (designated CmCCD4a) encoded by the clone ...
... Six clones of monoclonal antibodies (Mabs) to fowl adenovirus (FAV) serotype 1 were produced. All Mabs reacted positively by enzyme-linked immunosorbent assay. Three Mabs recognized the putative 100-kD hexon protein and reacted to serotype 1 specifically by western blot analysis but did not react to other FAV serotypes (2, 3, 4, 5, 6, 7, and 8a). These Mabs will be useful for immunodiagnosis of FA ...
RNA-directed DNA polymerase; Streptococcus pneumoniae; clones; genes; genomics; open reading frames; polymerase chain reaction; proteins; serotypes; virulence
Abstract:
... Eightlow-passage-number Streptococcus pneumoniae clinical isolates,each of a different serotype and a different multilocus sequence type,were obtained from pediatric participants in a pneumococcal vaccinetrial. Comparative genomic analyses were performed with these strainsand two S. pneumoniae reference strains. Individual genomiclibraries were constructed for each of the eight clinical isolates,w ...
... We describe a novel chromosome engineering technique for shuffling selected regions of chromosomes from two strains in Saccharomyces cerevisiae: The technique starts with the construction of MATa and MATα strains in which a particular chromosome is split at exactly the same site in both strains such that the split chromosomes generated are marked with different markers. The two strains are then cr ...
... The evolution of new combinations of bacterial properties contributes to biodiversity and the emergence of new diseases. We investigated the capacity for bacterial divergence with a chemostat culture of Escherichia coli. A clonal population radiated into more than five phenotypic clusters within 26 days, with multiple variations in global regulation, metabolic strategies, surface properties, and n ...
... To ascertain the extent to which indistinguishable strains of Escherichia coli O157:H7 are shared between farms, molecular characterization was performed on E. coli O157:H7 isolates recovered during a longitudinal study of 20 dairy farms in northeast Ohio. Of the 20 dairy farms sampled, 16 were located in a primary area and 4 were located in two other distant geographical areas. A total of 92 E. c ...
Lepidium draba; broadleaf weeds; perennials; invasive species; population genetics; spatial distribution; seedlings; rhizomes; genetic markers; amplified fragment length polymorphism; clones; vegetative propagation; biological control; seed productivity; Utah; South Dakota
Abstract:
... Hoary cress is a perennial herbaceous weed that has invaded agricultural and natural areas of western North America. Invasions are often composed of dense patches, and it is unclear whether clonal growth via lateral rhizomes or seedling recruitment is the dominant method of patch expansion. To study the clonal structure of this invasive, six patches from three USA populations (194 ramets) were ana ...
... Twelve poplar (Populus) clones, belonging to different species and interspecific hybrids, were studied during the third growing season of the second rotation of a high density coppice culture. Stomatal characteristics, as stomatal density and stomatal length, were examined for fully expanded leaves from all clones and at two canopy positions (upper and lower canopy). Above-ground biomass productio ...
... Genomic analysis of a hyperthermophilic archaeon, Thermococcus sp. strain NA1, revealed the presence of a 1,068-bp open reading frame encoding a protein consisting of 356 amino acids with a calculated molecular mass of 39,714 Da (GenBank accession no. DQ144132). Sequence analysis showed that it was similar to the putative aminopeptidase P (APP) of Thermococcus kodakaraensis KOD1. Amino acid residu ...
... Plant class III peroxidases (POXs) take part in the formation of lignin and maturation of plant cell walls. However, only a few examples of such peroxidases from gymnosperm tree species with highly lignified xylem tracheids have been implicated so far. We report here cDNA cloning of three xylem-expressed class III peroxidase encoding genes from Norway spruce (Picea abies). The translated proteins, ...
... The majority of verified plant disease resistance genes isolated to date belong to the NBS-LRR class, encoding proteins with a predicted nucleotide binding site (NBS) and a leucine-rich repeat (LRR) region. Using degenerate primers, designed from the conserved motifs of the NBS region in tobacco N and Arabidopsis RPS2 genes, we isolated 190 resistance gene analogs (RGA) clones from barley genomic ...
quantitative trait loci; marker-assisted selection; fungal diseases of plants; hybridization; Theobroma cacao; clones; agronomic traits; plant rots; Phytophthora palmivora; crop yield; disease resistance; pods; general combining ability; specific combining ability; cultivar identification; Moniliophthora roreri; Costa Rica
Abstract:
... Knowledge of genetic differences among commonly cultivated cacao clones, as well as the type of gene action involved for disease resistance, yield, quality, and horticultural traits, are essential for cacao breeders to select parental clones efficiently and effectively. This information is also critical for quantitative geneticists in designing and improving quantitative trait loci (QTL) localizat ...
Dechloromonas; bacteria; biofilm; chromium; clones; community structure; energy-dispersive X-ray analysis; functional diversity; pollutants; scanning electron microscopy; selenium
Abstract:
... Two different H₂-based, denitrifying membrane-biofilm reactors (MBfRs) initially reduced Se(VI) or Cr(VI) stably to Se⁰ or Cr(III). When the oxidized contaminants in the influent were switched, each new oxidized contaminant was reduced immediately, and its reduction soon was approximately the same or greater than it had been in its original MBfR. The precipitation of reduced selenium and chromium ...
... The karyotype of Indian muntjacs (Muntiacus muntjak vaginalis) has been greatly shaped by chromosomal fusion, which leads to its lowest diploid number among the extant known mammals. We present, here, comparative results based on draft sequences of 37 bacterial artificial clones (BAC) clones selected by chromosome painting for this special muntjac species. Sequence comparison on these BAC clones u ...
DNA; Taeniopygia guttata; W chromosome; Z chromosome; bacterial artificial chromosomes; chickens; clones; fluorescence in situ hybridization; genes; repetitive sequences
Abstract:
... Using fluorescent in-situ hybridization (FISH) of zebra finch (Taeniopygia guttata) bacterial artificial chromosome (BAC) clones, we determined the chromosomal localizations of 14 zebra finch genes that are Z-linked in chickens: ATP5A1, CHD1, NR2F1, DMRT1, PAM, GHR, HSD17B4, NIPBL, ACO1, HINT1, SMAD2, SPIN, NTRK2 and UBE2R2. All 14 genes also map to the zebra finch Z chromosome, indicating substan ...
cotton; fluorescence in situ hybridization; DNA libraries; bacterial artificial chromosomes; Gossypium hirsutum; linkage groups; DNA probes; clones; chromosome translocation; physical chromosome mapping
Abstract:
... Significant progress has been made in the construction of genetic maps in the tetraploid cotton Gossypium hirsutum. However, six linkage groups (LGs) have still not been assigned to specific chromosomes, which is a hindrance for integrated genetic map construction. In the present research, specific bacterial artificial chromosome (BAC) clones constructed in G. hirsutum acc. TM-1 for these six LGs ...
... Storing true seed (fluff) of sugarcane germplasm at low temperatures for preserving its germinability was highlighted as an alternative or complementary method for their maintenance and further utilisation in a Sugarcane Breeding Programme. The viability of defuzzed true seed collected from 50Saccharum spontaneum clones stored at -20°C temperature for five years was investigated .The germination p ...
Helianthus annuus; DNA libraries; bacterial artificial chromosomes; linkage groups; clones; nucleic acid hybridization; genetic markers; restriction fragment length polymorphism
Abstract:
... Complementary BAC and BIBAC libraries were constructed from nuclear DNA of sunflower cultivar HA 89. The BAC library, constructed with BamHI in the pECBAC1 vector, contains 107,136 clones and has an average insert size of 140 kb. The BIBAC library was constructed with HindIII in the plant-transformation-competent binary vector pCLD04541 and contains 84,864 clones, with an average insert size of 13 ...
DNA; Macropus eugenii; Pan troglodytes; Y chromosome; bacterial artificial chromosomes; clones; genome; humans
Abstract:
... The Y chromosome is perhaps the most interesting element of the mammalian genome but comparative analysis of the Y chromosome has been impeded by the difficulty of assembling a shotgun sequence of the Y. BAC-based sequencing has been successful for the human and chimpanzee Y but is difficult to do efficiently for an atypical mammalian model species (Skaletsky et al. 2003, Kuroki et al. 2006). We s ...
... Capacity and diversity are extremely important to the quality of various phage display libraries. In this work, λ phage-based in vitro package was applied to construct a filamentous phage display antibody library so as to enlarge its capacity and introduce more sequence diversity in the final library. In vivo recombination via Cre recombinase/lox sites was also exploited to create VH/VL combinatio ...
Mycobacterium tuberculosis; Nicotiana glutinosa; Ribgrass mosaic virus; Western blotting; clones; complementary DNA; electron microscopes; genes; messenger RNA; polymerase chain reaction
Abstract:
... Infectious cDNA clones of the Shanghai isolate of Ribgrass mosaic virus (RMV) were produced by joining four overlapping cDNA fragments and also in a single step by long template PCR. After inoculation of Nicotiana glutinosa with either RNA transcripts or the cDNA under the control of the CaMV 35S promoter, plants developed typical symptoms, and viral coat protein could be detected in them by Weste ...
tree breeding; Pinus radiata; genetic improvement; open pollination; genetic correlation; recurrent selection; clones; genotype; progeny testing; heritability; New Zealand
Abstract:
... Open-pollinated (OP) offspring of individual genotypes are commonly used for estimating their breeding values in recurrent selection programmes. Alternatively, vegetative propagules of individual genotypes could also be used to evaluate their relative performance. However, the mean for the vegetative propagules of a genotype represents an estimate of its total genotypic value, and it may or may no ...
... Marine microbial communities often contain multiple closely related phylogenetic clades, but in many cases, it is still unclear what physiological traits differentiate these putative ecotypes. The numerically abundant marine cyanobacterium Synechococcus can be divided into at least 14 clades. In order to better understand ecotype differentiation in this genus, we assessed the diversity of a Synech ...
... BACKGROUND: and Aims Recent studies have shown that certain composts may trigger indirect defence mechanisms by sensitizing the plant to create an increased state of resistance, similar to systemic acquired resistance. In this study, the capacity of a disease-suppressive compost to alter the expression pattern of certain pathogenesis-related (PR) genes in the root system of tomato plants (Solanum ...
... Phage ΦC31 integrase has potential as a means of inserting therapeutic genes into specific sites in the human genome. However, the possible interactions between ΦC31 integrase and cellular proteins have never been investigated. Using pLexA-ΦC31 integrase as bait, we screened a pB42AD-human fetal brain cDNA library for potential interacting cellular proteins. Among 61 positives isolated from 10⁶ in ...
... DBTSS was first constructed in 2002 based on precise, experimentally determined 5' end clones. Several major updates and additions have been made since the last report. First, the number of human clones has drastically increased, going from 190 964 to 1 359 000. Second, information about potential alternative promoters is presented because the number of 5' end clones is now sufficient to determine ...
... To verify the presence of Escherichia coli Nissle 1917 as a natural isolate in swine and to characterize in vitro probiotic properties as well as in vivo persistence in a feeding experiment. During studies on the intestinal microflora of pigs, we isolated E. coli Nissle 1917 sporadically from a pig population over a period of 1 year. The identity of the isolates as E. coli Nissle 1917 was verified ...
... Microsatellites were used to test genetic stability in somatic embryos (SE) of Quercus suber L. The SE were obtained by a simple somatic embryogenesis protocol: leaf explants from two adult plants (QsG0, QsG5) and from two juvenile plants (QsGM1, QsGM2) were inoculated on Murashige and Skoog (MS) medium with 2,4-dichlorophenoxyacetic acid and zeatin. Calluses with primary embryogenic structures we ...
... We have developed sediment-free anaerobic enrichment cultures that dechlorinate a broad spectrum of highly chlorinated polychlorinated biphenyls (PCBs). The cultures were developed from Aroclor 1260-contaminated sediment from the Housatonic River in Lenox, MA. Sediment slurries were primed with 2,6-dibromobiphenyl to stimulate Process N dechlorination (primarily meta dechlorination), and sediment ...
... Sixteen simple sequence repeats (SSRs) of apricot (Prunus armeniaca L.) were isolated from a bacterial artificial chromosome (BAC) library. Twelve restriction fragment length polymorphism (RFLP) probes mapped on LG1 of the Prunus general map were hybridized to the BAC library in order to select clones belonging to G1 linkage group of apricot. Selected BACs were digested, subcloned and hybridized w ...
... We developed dinoflagellate-specific 18S rRNA gene primers. PCR amplification using these oligonucleotides for a picoplanktonic DNA sample from Long Island Sound yielded 24 clones, and all but one of these clones were dinoflagellates primarily belonging to undescribed and Amoebophrya-like lineages. These results highlight the need for a systematic investigation of picodinoflagellate diversity in b ...
Suzuki, M.; Tawada, Y.; Kato, M.; Hori, H.; Mamiya, N.; Hayashi, Y.; Nakano, M.; Fukushima, R.; Katai, A.; Tanaka, T.; Hata, M.; Matsumoto, M.; Takahashi, M.; Sakae, K.
Staphylococcus aureus; antibiotic resistance; bacteriophages; chromosomes; clones; genomic islands; genotyping; hospitals; methicillin; open reading frames; pandemic; pulsed-field gel electrophoresis; Japan
Abstract:
... To develop a rapid genotyping method for investigating outbreaks of methicillin-resistant strains of Staphylococcus aureus (MRSA) isolated in Japan. Isolates were genotyped by detecting the keeping pattern of 16 open-reading frames (ORFs), a process we call phage ORF typing (POT). Thirteen of the ORFs were selected from phage genomes and one from a genomic island SaGIm in the genome of strain Mu50 ...