Androgenesis with Zygogenesis in Gynandromorphic Honeybees (
            <i>Apis mellifera</i>
            L.)

Rothenbuhler, Walter C.; Gowen, John W.; Park, O. W.

doi:10.1126/science.115.2998.637

Cited by 36 publications

(12 citation statements)

References 10 publications

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“…In addition to the possibility of androgenesis, the fluidity of cytogenetic events in early Capensis eggs and embryos may also facilitate the development of gynandromorphs, mosaics of male and female tissue arising from the development of a diploid zygote and an accessory haploid sperm cell (Rothenbuhler et al 1949), or even zoogenesis, in which two sperm cells fuse to make a diploid zygote (Rothenbuhler et al 1952).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, strange cytogenetic events sometimes occur even in Bnormal^(arrhenotokous) Apis mellifera. For example, Rothenbuhler et al (1952) demonstrated that diploid females can arise from the fusion of two sperm nuclei. In some honey bee strains, it is common for an embryo to develop from a zygote (the union of an egg and sperm) and from a secondary sperm cell.…”

Section: Introductionmentioning

confidence: 99%

“…In some honey bee strains, it is common for an embryo to develop from a zygote (the union of an egg and sperm) and from a secondary sperm cell. Adults arising from such eggs are gynandromorphs with some diploid (female) tissue and some haploid (male) tissue (Rothenbuhler et al 1952;Tucker 1958;Narita et al 2010). …”

Section: Introductionmentioning

confidence: 99%

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Cytogenetic basis of thelytoky in Apis mellifera capensis

et al. 2017

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-Haplodiploid insects reproduce both sexually and asexually; haploid males arise from unfertilized eggs, while diploid females arise from fertilized eggs. Some species can also produce female offspring by thelytokous parthenogenesis. For example, queenless workers of the Cape honey bee, Apis mellifera capensis , of South Africa can produce diploid female offspring from unfertilized eggs. Genetic evidence suggests that in A. m. capensis , diploidy is restored in zygotes by the fusion of two maternal pronuclei, the haploid descendants of the two alternate products of meiosis I. Here, we confirm this genetic evidence by direct cytological observation of pronucleus fusion. We also provide a description of how the fusion occurs at 4.5-5 h post oviposition and describe the meiotic events that lead up to and follow the fusion. Finally, we document numerous departures from the typical meiotic patterns, which likely explain some of the anomalous A . m. capensis individuals that have been previously identified genetically.Apis mellifera / thelytoky / central fusion / confocal fluorescence microscopy / haplodiploidy

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cytogenetic basis of thelytoky in Apis mellifera capensis

et al. 2017

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“…B 371: 20150534 from division of a second (or perhaps more) sperm cell(s) so that part of the embryo derives from the zygote, and is therefore diploid and female, whereas other parts derive from a second sperm and are haploid and male [63,64]. Clearly, the male tissue is androgenetic [63], though this is not usually of evolutionary consequence as such individuals are unlikely to reproduce. Nevertheless, if gynandromorphy goes 'all the way', as it were, then we would have a case of androgenesis.…”

Section: Androgenesis In Gynandromorphs and Other Mosaicsmentioning

confidence: 99%

Androgenesis: where males hijack eggs to clone themselves

Schwander

Oldroyd

2016

Phil. Trans. R. Soc. B

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“…Multiple types of gynandromorphism may occur within a species, e.g., in the shrimp Anostraca (Sassaman and Fugate 1997) and in the wasp Habrobracon juglandis (Clark et al 1971). Gynandromorphs may develop from fertilized as well as from unfertilized eggs, as shown for honeybees (Rothenbuhler et al 1952) and the parasitic wasp H. juglandis (Clark et al 1971). In the latter species the recessive mutant ebony (dark body color) increases the frequency of gynandromorphs in fertilized eggs to $5% (Clark et al 1968).…”

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confidence: 99%

Inheritance of Gynandromorphism in the Parasitic Wasp Nasonia vitripennis

et al. 2007

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The parasitic wasp Nasonia vitripennis has haplo-diploid sex determination. Males develop from unfertilized eggs and are haploid, whereas females develop from fertilized eggs and are diploid. Females and males can be easily distinguished by their morphology. A strain that produces individuals with both male and female features (gynandromorphs) is studied. We provide data on female/male patterning within and between individuals, on environmental effects influencing the occurrence of gynandromorphism, and on its pattern of inheritance. A clear anterior/posterior pattern of feminization is evident in gynandromorphic individuals that developed from unfertilized haploid eggs. The proportion of gynandromorphic individuals can be increased by exposing the mothers to high temperature and also by exposing embryos at early stages of development. Selection for increased gynandromorph frequency was successful. Backcross and introgression experiments showed that a combination of a nuclear and a heritable cytoplasmic component causes gynandromorphism. Analyses of reciprocal F 2 and F 3 progeny indicate a maternal effect locus (gyn1) that maps to chromosome IV. Coupled with previous studies, our results are consistent with a N. vitripennis sex determination involving a maternal/zygotic balance system and/or maternal imprinting. Genetics and temperature effects suggest a temperature-sensitive mutation of a maternally produced masculinizing product that acts during a critical period in early embryogenesis.

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Androgenesis with Zygogenesis in Gynandromorphic Honeybees ( Apis mellifera L.)

Cited by 36 publications

References 10 publications

Cytogenetic basis of thelytoky in Apis mellifera capensis

Cytogenetic basis of thelytoky in Apis mellifera capensis

Androgenesis: where males hijack eggs to clone themselves

Inheritance of Gynandromorphism in the Parasitic Wasp Nasonia vitripennis

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