Multiple Matings
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Fatores da biologia reprodutiva que influenciam o menejo comportamental de Tuta absoluta (Meyrick) (Lepidoptera : Gelechiidae). / Reproductive biology factors influencing the Behavioral management of Tuta absoluta (Meyrick) (Lepidoptera : Gelechiidae).
A traça-do-tomateiro, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) é a principal praga da cultura do tomate nas principais regiões produtoras do Brasil e várias táticas de controle foram usadas com resultados variados. A técnica da coleta massal foi uma das táticas utilizadas, e apesar da redução da população dos machos, não se obteve contr
Publicado em: 2008
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2. Eye colour as a genetic marker for fertility and fecundity of Triatoma infestans (Klug, 1834) Hemiptera, Reduviidae, Triatominae
Eye colour of Triatoma infestans is controlled at a single autosomal locus, with black-eye as the dominant gene and red-eye as the recessive. Inheritance of these characters follows a classical Mendelian system, enabling eye colour to be used as a marker for studies of mating frequency. We found no significant differences in oviposition rates and egg hatchin
Memórias do Instituto Oswaldo Cruz. Publicado em: 2002-07
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3. Polyandry in a marine turtle: Females make the best of a bad job
The female perspective on reproductive strategies remains one of the most active areas of debate in biology. Even though a single mating is often sufficient to satisfy the fertilization needs of most females and the act of further mating incurs costs, multiple paternity within broods or clutches is a common observation in nature. Direct or indirect advantage
National Academy of Sciences.
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4. Re-evaluation of CHANDS.
A rare ectodermal dysplasia with the acronym CHANDS (Curly Hair, Ankyloblepharon, Nail Dysplasia Syndrome) was described by Baughman (1971) as being a new autosomal dominant condition. Additional pedigree data obtained after the original report indicate that the mode of inheritance is more likely to be autosomal recessive, with an instance of quasi-dominant
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5. Heterogenomic Recombinants from Compatible Nocardiae
Recombinants obtained from matings of Nocardia erythropolis × N. canicruria were tested for their genetic stability by comparing phenotypes from direct selection with the same population after unselected growth. Contraselective loci were employed in various combinations in order that all of the mapped characters might be subjected to unselected analysis. So
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6. The Evolution of Multiple Mating Behavior by Honey Bee Queens (APIS MELLIFERA L.)
A model is presented showing that natural selection operating at the individual level can adequately explain the evolution of multiple mating behavior by honey bee queens. Group selection need not be invoked. The fitness of a given female genotype is a function of the number of sex alleles in the population, the number of matings by an individual female and
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7. Molecular analysis of multiple-resistance plasmids transferred from gram-negative bacteria isolated in a urological unit.
Forty-one isolates of multiply resistant gram-negative bacteria causing infection in a urological unit of a Dublin hospital were collected during a 6-month period. Twenty-one isolates transferred multiple resistance to an Escherichia coli K-12 recipient in liquid matings. Serratia marcescens, Proteus morganii, Proteus vulgaris, and E. coli isolates harbored
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8. Plasmid-associated transfer of tetracycline resistance in Bacteroides ruminicola.
Tetracycline resistance was transferred at frequencies between 10(-7) and 10(-6) per recipient cell in anaerobic matings between two strains of the strictly anaerobic rumen bacterium Bacteroides ruminicola. The donor strain, 223/M2/7, was a multiple-plasmid-bearing tetracycline-resistant strain from the ovine rumen, and the recipient, F101, was a rifampin-re
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9. R-plasmid transfer frequencies from environmental isolates of Escherichia coli to laboratory and fecal strains.
Multiple-drug-resistant strains of Escherichia coli were isolated from the water at an estuarine site. They represented about 8.3% of the total E. coli population. Fifty-five strains, representing each of the 32 resistance patterns identified, were mated with an E. coli K-12 F- strain. Matings were performed on membrane filters, and the cells were washed to
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10. Hospital Isolates of Serratia marcescens Transferring Ampicillin, Carbenicillin, and Gentamicin Resistance to Other Gram-Negative Bacteria Including Pseudomonas aeruginosa
Thirteen independent isolates of Serratia marcescens associated with nosocomial urinary tract infections were obtained from the clinical microbiology laboratory at Hines Veterans Administration Hospital. The isolates were resistant to at least ampicillin, carbenicillin, gentamicin, and tobramycin. They could be divided into two groups on the basis of their a
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11. Sexual conflict and cooperation in butterfly reproduction: a comparative study of polyandry and female fitness.
Most butterfly species can be characterized as capital breeders, meaning that reproductive output is strongly coupled to the amount of resources they have procured during the larval stage. Accordingly, female fecundity is generally correlated with female mass, both within and across species. However, the females of some species can be partly characterized as
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12. Multiple routes to asexuality in an aphid species.
Cyclical parthenogens, including aphids, are important models for studying the evolution of sex. However, little is known about transitions to asexuality in aphids, although the mode of origin of asexual lineages has important consequences for their level of genetic diversity, ecological adaptability and the outcome of competition with their sexual relatives