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  • 1
    Digitale Medien
    Digitale Medien
    Neotropical African bees (1989)
    [s.l.] : Nature Publishing Group
    Nature 339 (1989), S. 181-182 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] DESCENDANTS of African honey bees that were imported into Brazil in 1956 have successfully colonized most of South and Central America and are now spreading throughout Mexico. The spread of this feral 'Africanized' population has been followed and documented for more than 25 years, but the genetic ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/339181b0
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  • 2
    Digitale Medien
    Digitale Medien
    Genetic determination of guarding and undertaking in honey-bee colonies (1988)
    [s.l.] : Nature Publishing Group
    Nature 333 (1988), S. 356-358 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Behavioural differentiation among worker honey bees is in part age-based, but there is also variation among workers in the rate of behavioural development and the degree of task specialization at a particular age6'7. Due to polyandry8"10 and sperm mixing10'11, honey-bee colonies are assemblages of ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/333356a0
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  • 3
    Digitale Medien
    Digitale Medien
    Genetic specialists, kin recognition and nepotism in honey-bee colonies (1989)
    [s.l.] : Nature Publishing Group
    Nature 338 (1989), S. 576-579 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Honey-bee colonies normally consist of about 17 subfamilies7. Members of the same subfamily, super sisters14, share both a queen mother and a drone father and, in the absence of inbreed-ing, have a coefficient of genetic relationship of 0.75 (ref. 15). Half-sisters belong to different subfamilies, ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/338576a0
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  • 4
    Digitale Medien
    Digitale Medien
    Nepotism in the honey bee (1990)
    [s.l.] : Nature Publishing Group
    Nature 346 (1990), S. 708-708 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] PAGE AND ROBINSON REPLY-The ability of worker honey bees to discriminate among queen larvae on the basis of kinship has been controversial since two papers were published in 1984, when R.E.P. and Erickson reported19 that workers could distinguish between nestmate and non-nestmate larvae while ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/346708a0
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  • 5
    Digitale Medien
    Digitale Medien
    Complex social behaviour derived from maternal reproductive traits (2006)
    [s.l.] : Nature Publishing Group
    Nature 439 (2006), S. 76-78 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] A fundamental goal of sociobiology is to explain how complex social behaviour evolves, especially in social insects, the exemplars of social living. Although still the subject of much controversy, recent theoretical explanations have focused on the evolutionary origins of worker behaviour ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature04340
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  • 6
    Digitale Medien
    Digitale Medien
    Patterns of inheritance with RAPD molecular markers reveal novel types of polymorphism in the honey bee (1992)
    Springer
    Theoretical and applied genetics 85 (1992), S. 15-20 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Random amplified polymorphic DNA (RAPD) ; Apis mellifera ; Genetic markers
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The polymerase chain reaction (PCR) was used to generate random amplified polymorphic DNA (RAPD) from honey bee DNA samples in order to follow the patterns of inheritance of RAPD markers in a haplodiploid insect. The genomic DNA samples from two parental bees, a haploid drone and a diploid queen, were screened for polymorphism with 68 different tennucleotide primers of random sequence. Parents were scored for the presence or absence of individual bands. An average of 6.3 bands and 1.3 polymorphisms for presence/absence were observed per primer between the parents. Thirteen of these primers were used to determine the inheritance of RAPD marker alleles in the resulting progeny and in haploid drones from a daughter queen. Four types of polymorphisms were observed. Polymorphisms for band presence/absence as well as for band brightness were inherited as dominant markers, meeting Mendelian expectations in haploid and diploid progeny. Polymorphisms for fragment-length were also observed. These segregated in a near 1∶1 ratio in drone progeny. The last type of polymorphism was manifested as a diploid-specific band. Mixing of amplification products after PCR showed that the diploid-specific band was the result of heteroduplex formation from the DNA of alternate alleles in heterozygotes. In two of the four cases of heteroduplex formation, the alternative alleles were manifested as small fragment-length polymorphisms, resulting in co-dominant markers. This is the first demonstration that a proportion of RAPD markers are not inherited in a dominant fashion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00223839
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  • 7
    Digitale Medien
    Digitale Medien
    Effect of age of worker honey bees (Apis mellifera) on tracheal mite (Acarapis woodi) infestation (1989)
    Springer
    Experimental and applied acarology 7 (1989), S. 153-160 
    Details
    ISSN: 1572-9702
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The susceptibility of worker honey bees,Apis mellifera L., as a function of age, to infestation by tracheal mites,Acarapis woodi Rennie, was investigated. Bees 〈24 h old were infested most frequently, and the frequency of infestation declined precipitously thereafter. Bees 〉4 days old were rarely infested in colonies during active brood rearing. Only 2 of 255 bees 〉8 days old, and 1 of 246 bees 〉16 days old, became infested. Most of the eggs found in bees〉3 weeks old apparently were produced by the progeny of the original infestation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01270435
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  • 8
    Digitale Medien
    Digitale Medien
    Linkage analysis of sex determination in the honey bee (Apis mellifera) (1994)
    Springer
    Molecular genetics and genomics 244 (1994), S. 512-518 
    Details
    ISSN: 1617-4623
    Schlagwort(e): RAPD markers ; Sequence-tagged site (STS) ; Haplodiploidy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A colony-level phenotype was used to map the major sex determination locus (designatedX) in the honey bee (Apis mellifera). Individual queen bees (reproductive females) were mated to single drones (fertile males) by instrumental insemination. Haploid drone progeny of an F1 queen were each backcrossed to daughter queens from one of the parental lines. Ninety-eight of the resulting colonies containing backcross progeny were evaluated for the trait ‘low brood-viability’ resulting from the production of diploid drones that were homozygous atX. DNA samples from the haploid drone fathers of these colonies were used individually in polymerase chain reactions (PCR) with 10-base primers. These reactions generated random amplified polymorphic DNA (RAPD) markers that were analyzed for cosegregation with the colony-level phenotype. One RAPD marker allele was shared by 22 of 25 drones that fathered low brood-viability colonies. The RAPD marker fragment was cloned and partially sequenced. Two primers were designed that define a sequence-tagged site (STS) for this locus. The primers amplified DNA marker fragments that cosegregated with the original RAPD marker. In order to more precisely estimate the linkage betweenX and the STS locus, another group of bees consisting of progeny from one of the low-brood viability colonies was used in segregation analysis. Four diploid drones and 181 of their diploid sisters (workers, nonfertile females) were tested for segregation of the RAPD and STS markers. The cosegregating RAPD and STS markers were codominant due to the occurrence of fragment-length alleles. The four diploid drones were homozygous for these markers but only three of the 181 workers were homozygotes (recombinants). Therefore the distance betweenX and the STS locus was estimated at 1.6 cM. An additional linked marker was found that was 6.6 cM from the STS locus.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00583902
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  • 9
    Digitale Medien
    Digitale Medien
    Phenotypic variation in susceptibility of honey bees,Apis mellifera, to infestation by tracheal mites,Acarapis woodi (1987)
    Springer
    Experimental and applied acarology 3 (1987), S. 291-305 
    Details
    ISSN: 1572-9702
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A laboratory bioassay was used to study phenotypic differences in susceptibility of honey bees,Apis mellifera L., to tracheal mites,Acarapis woodi Rennie. Significantly different infestation frequencies were found in bees from 23 colonies containing queens that were instrumentally inseminated with single drones. Queens and drones originated from a closed population composed of commercial stock from various areas of the United States. Mites were randomly distributed with respect to right and left prothoracic tracheae. Tracheae containing mites were no more or less attractive to migrating mites than non-infested tracheae. The same quantity of progeny per female was produced in tracheae containing 1–3 mites. Female mites apparently do not migrate a second time after egg laying begins. The degree of phenotypic variation suggests that selection of honey bees for tracheal mite resistance is feasible.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01193166
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  • 10
    Digitale Medien
    Digitale Medien
    Genotypic variation in susceptibility of honey bees (Apis mellifera) to infestation by tracheal mites (Acarapis woodi) (1990)
    Springer
    Experimental and applied acarology 8 (1990), S. 275-283 
    Details
    ISSN: 1572-9702
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Two-way selection for lines of honey bees (Apis mellifera L.) susceptible and resistant to infestation by tracheal mites (Acarapis woodi Rennie) was conducted for two generations. Individuals of the susceptible line were 1.4 and 2.4 times more likely to become infested by female mites after the first and second generations, respectively. These results demonstrate that genotypic variability exsts within North American populations and that selection for resistance is feasible. The mechanisms of resistance are unknown.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01202137
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