Ultrastructure des spermatozoides des males haploides et diploides de Diadromus pulchellus wesmeal (Hymenoptera : Ichneumonidae)

Chauvin, G.; Agoze, M. El; Hamon, Claude; Huignard, J.

doi:10.1016/0020-7322(88)90016-5

Cited by 19 publications

(15 citation statements)

References 10 publications

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“…However, in L. dieloceri and Pachysomoides sp., this dilatation was not observed, which represents the first report of the absence of dilatation along the deferent ducts, being the spermatozoa, in these species, stocked along the deferent ducts. Spermatozoa from L. dieloceri, measuring 140 mm, are the longest reported for Ichneumonidae; while spermatozoa from Pachysomoides sp., measuring 28 mm, are the smallest registered for the family, with observations varying from 55 mm (Alomyinae, Quicke et al, 1992) to 100 mm (Ichneumoninae, Chauvin et al, 1988) in literature. Spermatozoa from the two species analyzed are linear as found in other species of Ichneumonidae (Quicke et al, 1992) and in most Aculeata (Hoage and Kessel, 1968;Cruz-Hö fling et al, 1970;Lensky et al, 1979;Wheeler et al, 1990;Peng et al, 1992Peng et al, , 1993Lino-Neto and Dolder, 2002;Zama et al, 2001Zama et al, , 2004Zama et al, , 2005aAraú jo et al, 2005bAraú jo et al, , 2009Fiorillo et al, 2005;Mancini et al, 2006;Moya et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Structural and ultrastructural characteristics of male reproductive tract and spermatozoa in two Cryptinae species (Hymenoptera: Ichneumonidae)

Moreira

Araújo

Báo

et al. 2010

Micron

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This study represents the first characterization of male reproductive tracts and ultrastructural description of sperm of Cryptinae species. In Lymeon dieloceri and Pachysomoides sp., the male reproductive tract is formed by a pair of testis, two deferent ducts, two accessory glands and one ejaculatory duct. The spermatozoa are similar to those described for other Hymenoptera, with: (1) the acrosome formed by the acrosomal vesicle covering the perforatorium, which has its base inserted in a cavity located in the nucleus point; (2) a thin nucleus with electron-dense chromatin; (3) an electron-dense centriolar adjunct located between the nucleus and one of the two mitochondrial derivatives; (4) an axoneme with a 9 + 9 + 2 microtubule arrangement; (5) two long mitochondrial derivatives with peripheral cristae and; (6) two accessory bodies located between the two mitochondrial derivatives and the axoneme. These ichneumonids present structural characteristics similar to other parasitic wasps, such as presence of a single follicle per testis, layer of extracellular material enveloping the acrosome and accessory microtubules ending before others in final portion of the flagellum. However, male reproductive system and the spermatozoa presented morphological characteristics that allowed their differentiation, such as oval shapes accessory glands and the symmetric mitochondrial derivatives in L. dieloceri compared to the spherical accessory glands and asymmetrical derivatives observed in Pachysomoides sp. Taken together, data presented here demonstrates that diversity of morphological characteristic from the male reproductive tract and spermatozoa in Hymenoptera might provide a character system that can be used, in association with other systems, to resolve various uncertainties about the evolutionary relationships of this insect group.

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Section: Discussionmentioning

confidence: 99%

Structural and ultrastructural characteristics of male reproductive tract and spermatozoa in two Cryptinae species (Hymenoptera: Ichneumonidae)

Moreira

Araújo

Báo

et al. 2010

Micron

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“…Diploid males of the related C. glomerata also produce diploid sperm (Zhou et al, 2006) but it has not been determined whether females of this species mate with diploid males and produce triploid offspring. With the exception of E. foraminatus (Cowan and Stahlhut, 2004), diploid males of all species that have been studied so far produce diploid sperm and triploid progeny, if any (for example, Hoshiba et al, 1981;Chauvin et al, 1987;Yamauchi et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Diploid males sire triploid daughters and sons in the parasitoid wasp Cotesia vestalis

et al. 2007

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In the Hymenoptera, males develop as haploids from unfertilized eggs and females develop as diploids from fertilized eggs. In species with complementary sex determination (CSD), however, diploid males develop from zygotes that are homozygous at a highly polymorphic sex locus or loci. We investigated mating behavior and reproduction of diploid males of the parasitoid wasp Cotesia vestalis (C. plutellae), for which we recently demonstrated CSD. We show that the behavior of diploid males of C. vestalis is similar to that of haploid males, when measured as the proportion of males that display wing fanning, and the proportion of males that mount a female. Approximately 29% of diploid males sired daughters, showing their ability to produce viable sperm that can fertilize eggs. Females mated to diploid males produced all-male offspring more frequently (71%) than females mated to haploid males (27%). Daughter-producing females that had mated to diploid males produced more male-biased sex ratios than females mated to haploid males. All daughters of diploid males were triploid and sterile. Three triploid sons were also found among the offspring of diploid males. It has been suggested that this scenario, that is, diploid males mating with females and constraining them to the production of haploid sons, has a large negative impact on population growth rate and secondary sex ratio. Selection for adaptations to reduce diploid male production in natural populations is therefore likely to be strong. We discuss different scenarios that may reduce the sex determination load in C. vestalis.

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“…This shape and position probably made the structure difficult to observe or it was misinterpreted (Hoage & Kessel 1968). Also in other hymenopterans, this structure has been initially interpreted as being the anterior tip of one of the mitochondrial derivatives (Quicke et al, 1992) or a region where the axoneme, nucleus and mitochondrial derivatives overlap (Chauvin et al 1988). In the majority of those species, if not in all, only one accessory body was observed near the nuclear base, associated to one of the mitochondrial derivatives (Quicke et al 1992); the other structure was interpreted also as a mitochondrial derivative, probably corresponding to the centriolar adjunct.…”

Section: Discussionmentioning

confidence: 99%

Sperm ultrastructure of the honey bee (Apis mellifera) (L) (Hymenoptera, Apidae) with emphasis on the nucleus-flagellum transition region

2000

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The flagellum of Apis mellifera (Hymenoptera, Apidae) consists of two mitochondrial derivatives, an axoneme and two accessory bodies. The mitochondrial derivatives are of unequal size and lie parallel to the axoneme. In the larger derivative four regions can be distinguished while in the smaller, only three. The region occurring only in the larger derivative consists of paracystalline material. The smaller mitochondrial derivative terminates anterior to the larger one. An extremely long centriolar adjunct is observed between the nucleus and the smaller mitochondrial derivative. This adjunct is compact, very electron dense and gradually tapers from base toward apex, finishing at the anterior extremity of the axonemal microtubules. In this flagellar region, there is only one accessory body present between the larger mitochondrial derivative and the axoneme. Anteriorly, the tips of the axonemal microtubules are inserted in a well developed mass of granular appearance. This material surrounds the nuclear base, separating it from the anterior end of the larger mitochondrial derivative. We believe that the structure identified here as a centriolar adjunct is homologous to that observed in Formicidae, Ichneumonoidea and Symphyta. Therefore, very probably, it is common to most Hymenoptera.

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Ultrastructure des spermatozoides des males haploides et diploides de Diadromus pulchellus wesmeal (Hymenoptera : Ichneumonidae)

Cited by 19 publications

References 10 publications

Structural and ultrastructural characteristics of male reproductive tract and spermatozoa in two Cryptinae species (Hymenoptera: Ichneumonidae)

Structural and ultrastructural characteristics of male reproductive tract and spermatozoa in two Cryptinae species (Hymenoptera: Ichneumonidae)

Diploid males sire triploid daughters and sons in the parasitoid wasp Cotesia vestalis

Sperm ultrastructure of the honey bee (Apis mellifera) (L) (Hymenoptera, Apidae) with emphasis on the nucleus-flagellum transition region

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