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  • Coleoptera  (4)
  • maize
  • Springer  (7)
  • 1990-1994  (5)
  • 1985-1989  (2)
  • 1955-1959
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  • Springer  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    Sequence analysis of three fragments of maize nuclear DNA which replicate autonomously in yeast (1988)
    Springer
    Plant molecular biology 11 (1988), S. 173-182 
    Details
    ISSN: 1573-5028
    Keywords: ARS ; maize ; DNA sequence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract There maize nuclear DNA fragments were isolated on the basis of their ability to confer replication on chimeric plasmids in yeast. These Eco RI fragments of 2.5, 2.8 and 5.5 kb are repeated elements within the maize genome. The 2.5 and 2.8 kb fragments represent a family of elements repeated 11 000 times in the maize haploid genome, while the 5.5 kb fragment is part of another family of 28 000 elements. These fragments were subcloned to further define the unique region of ARS activity. The sequence of each 550–650 bp ARS subclone is reported here, and compared to the flanking regions which do not show ARS activity. The ARS elements are 65–70% A+T as compared to 50–55% for the maize genome as a whole. There is approximately 15% sequence divergence, as well as variation of ARS efficiency, among family members. ARS subclones contain the proposed yeast consensus sequence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015669
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  • 2
    Electronic Resource
    Electronic Resource
    Genomic organization of two families of highly repeated nuclear DNA sequences of maize selected for autonomous replicating activity in yeast (1988)
    Springer
    Plant molecular biology 11 (1988), S. 161-172 
    Details
    ISSN: 1573-5028
    Keywords: ars ; genome organization ; maize ; repeated DNA ; replication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Maize nuclear DNA sequences capable of promoting the autonomous replication of plasmids in yeast were isolated by ligating Eco RI-digested fragments into yeast vectors unable to replicate autonomously. Three such autonomously replicating sequences (ARS), representing two families of highly repeated sequences within the maize genome, were isolated and characterized. Each repetitive family shows hybridization patterns on a Southern blot characteristic of a dispersed sequence. Unlike most repetitive sequences in maize, both ARS families have a constant copy number and characteristic genomic hybridization pattern in the inbred lines examined. Larger genome clones with sequence homology to the ARS-containing elements were selected from a lambda library of maize genomic DNA. There was typically only one copy of an ARS-homologous sequence on each 12–15 kb genomic fragment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015668
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  • 3
    Electronic Resource
    Electronic Resource
    Aggregation pheromone of palmetto weevil,Rhynchophorus cruentatus (F.) (Coleoptera: Curculionidae) (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 505-515 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Curculionidae ; Rhynchophorus cruentatus ; palmetto weevil ; S. palmetto ; aggregation pheromone ; 5-methyl-4-octanol ; cruentol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract 5-Methyl-4-octanol is the major aggregation pheromone of the palmetto weevil,Rhynchophorus cruentatus (F.). The pheromone (cruentol) was identified by coupled gas chromatographic-electroantennographic (GC-EAD) analysis of male-produced volatiles, coupled GC-mass spectrometry (MS) in electron impact and chemical ionization mode, and coupled GC-high resolution MS. In laboratory and field assays, a diastereomeric mixture of synthetic cruentol greatly enhanced attraction of weevils to cabbage palmetto,Sabal palmetto (Walter), stem tissue, indicating that cruentol and host volatiles are synergistically attractive. An attractive lure in combination with efficient traps should facilitate development of semiochemical-based management forR. cruentatus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02059593
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  • 4
    Electronic Resource
    Electronic Resource
    Laboratory and field evidence for maleproduced aggregation pheromone inRhynchophorus cruentatus (F.) (Coleoptera: Curculionidae) (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 1195-1203 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Curculionidae ; Rhynchophorus cruentatus ; Sabalpalmetto ; aggregation pheromone ; olfactometer ; field trapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Laboratory and field assays were conducted to determine if palmetto weevil,Rhynchophorus cruentatus (F.), adults produce an aggregation pheromone. Attraction of females in a Y-tube olfactometer to conspecific males was greater than to clean air. Male and female attraction to conspecific male volatiles combined with host-palm,Sabal palmetto (Walter), volatiles was greater than to host-palm volatiles alone. Similarly, more weevils were caught in the field in traps baited with conspecific males plus host-palm tissue than in similar traps baited with only males, or palm tissue, or females, or females plus palm tissue. These results suggest thatR. cruentatus males produce an aggregation pheromone(s) that is highly attractive to conspecific adults of both sexes when combined with host-palm volatiles. This study is an important step towards understanding the chemical ecology ofR. cruentatus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987380
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  • 5
    Electronic Resource
    Electronic Resource
    Mid-parent heterosis and combining ability of European corn borer resistance in maize (1993)
    Springer
    Euphytica 72 (1993), S. 65-72 
    Details
    ISSN: 1573-5060
    Keywords: diallel analysis ; host plant resistance ; Ostrinia nubilalis ; plant breeding ; Zea mays ; maize ; European corn borer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Success in breeding maize resistant to the European corn borer has been limited, with the exception of leaf feeding resistance. The inheritance of resistance to leaf, sheath-collar and ear damage in four maize germplasms and their six F1 crosses was evaluated by diallel analysis. Plants in a completely randomized design were artificially infested at the whorl, anthesis or full silk stage of plant development and were evaluated in the field for insect damage. A damage index based on size, number and location of lesions was calculated for each stage. Stowell's Evergreen (susceptible) had a mean damage index three to six times that of Maiz Amargo (resistant) at the whorl stage and the progeny plants were more resistant than the susceptible parent. Maiz Amargo and its crosses had significantly lower mean indices than Stowell's Evergreen for sheath-collar damage in Year 1 but not Year 2. Zapalote Chico, Maiz Amargo and their cross were significantly less damaged than other genotypes at the full silk stage. Heterosis values indicated an increase in resistance of crosses over the midparent average at all three stages of development. General combining ability (GCA) was highly significant for all types of damage, but specific combining ability was significant only for leaf damage. Based on estimates of GCA, Maiz Amargo was the best source of resistance to leaf and sheath-collar damage and both Zapalote Chico and Maiz Amargo would be good parents for ear damage resistance. Results suggest that resistance at different plant development stages can be combined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023774
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  • 6
    Electronic Resource
    Electronic Resource
    Pheromone chirality of african palm weevil,Rhynchophorus phoenicis (F.) and palmetto weevil,Rhynchophorus cruentatus (F.) (Coleoptera: Curculionidae) (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 2653-2671 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Curculionidae ; Rhynchophorus phoenicis ; Rhynchophorus cruentatus ; aggregation pheromone ; pheromone chirality ; (3S,4S)-3-methyl-octan-4-ol ; (3R,4R)-3-methyl-octan-4-ol ; (3S,4R)-3-methyl-octan-4-ol ; (3R,4S)-3-methyl-octan-4-ol ; (4S,5S)-5-methyl-octan-4-ol ; (4R,5R)-5-methyl-octan-4-ol ; (4S,5R)-5-methyl-octan-4-ol ; (4R,5S)-5-methyl-octan-4-ol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract There are four stereoisomers of both 3-methyl-octan-4-ol, the aggregation pheromone of the African palm weevil,Rhynchophorus phoenicis (F.) and 5-methyl-octan-4-ol, the aggregation pheromone of the palmetto weevil,Rhynchophorus cruentatus (F.). Synthetic stereoisomers of 3-methyl-octan-4-ol and 5-methyl-octan-4-ol were baseline-separated on a Cyclodex-B fused silica column. Use of this column in gas chromatographic-electroantennographic detection (GC-EAD) and GC-mass spectrometric (GC-MS) analyses revealed that only one stereoisomer, (3S,4S)-3-methyl-octan-4-ol and (4S,5S)-5-methyl-octan-4-ol, is produced by maleR. phoenicis and maleR. cruentatus, respectively, and elicits good antennal responses by conspecific male and female weevils. In field trapping experiments, withR. phoenicis in Côte d'Ivoire andR. cruentatus in Florida, (3S,4S)-3-methyl-octan-4-ol and (4S,5S)-5-methyl-octan-4-ol strongly enhanced attraction of fresh palm tissue, whereas other stereoisomers were behaviorally benign. Stereoisomeric 3-methyl-octan-4-ol and 5-methyl-octan-4-ol may be utilized to monitor and/or manage populations of these two palm weevils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036199
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  • 7
    Electronic Resource
    Electronic Resource
    Aggregation pheromone for the pepper weevil,Anthonomus eugenii cano (Coleoptera: Curculionidae): Identification and field activity (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 1537-1555 
    Details
    ISSN: 1573-1561
    Keywords: Attractant ; alcohol ; aldehyde ; geranic acid ; monitoring ; aggregation pheromone ; Anthonomus eugenii ; pepper weevil ; Coleoptera ; Curculionidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract This study describes the identification of an aggregation pheromone for the pepper weevil,Anthonomus eugenii and field trials of a synthetic pheromone blend. Volatile collections and gas chromatography revealed the presence of six male-specific compounds. These compounds were identified using chromatographic and spectral techniques as: (Z)-2-(3,3-dimethylcyclohexylidene)ethanol, (E)-2-(3,3-dimethylcyclohexylidene)ethanol, (Z)-(3,3-dimethylcyclohexylidene)acetaldehyde, (E)-(3,3-dimethylcyclohexylidene)acetaldehyde, (E)-3,7-dimethyl-2,6-octadienoic acid (geranic acid), and (E)-3,7-dimethyl-2,6-octadien-1-ol (geraniol). The emission rates of these compounds from feeding males were determined to be about: 7.2, 4.8, 0.45, 0.30, 2.0, and 0.30µg/male/day, respectively. Sticky traps baited with a synthetic blend of these compounds captured more pepper weevils (both sexes) than did unbaited control traps or pheromone-baited boll weevil traps. Commercial and laboratory formulations of the synthetic pheromone were both attractive. However, the commercial formulation did not release geranic acid properly, and geranic acid is necessary for full activity. The pheromones of the pepper weevil and the boll weevil are compared. Improvements for increasing trap efficiency and possible uses for the pepper weevil pheromone are discussed. A convenient method for purifying geranic acid is also described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02059879
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