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Cytology of Wolbachia-induced parthenogenesis in Leptopilina clavipes (Hymenoptera: Figitidae).
Parthenogenesis induced by cytoplasmatically inherited Wolbachia bacteria has been found in a number of arthropod species, mainly Hymenoptera. Previously, two different forms of diploidy restoration… Expand
Automictic parthenogenesis in the parasitoid Venturia canescens (Hymenoptera: Ichneumonidae) revisited.
Both arrhenotokous and thelytokous reproduction are known to occur in the parasitoid wasp Venturia canescens. The cytological mechanism of thelytoky was previously reported to involve the formation… Expand
Haploid Females in the Parasitic Wasp Nasonia vitripennis
The insect order of Hymenoptera (ants, bees, sawflies, and wasps) consists almost entirely of haplodiploid species. Under haplodiploidy, males develop from unfertilized eggs and are haploid, whereas… Expand
Cytology of Parthenogenesis in Bacillus whitei and Bacillus lynceorum (Insecta Phasmatodea)
Summary We investigated the maturation divisions of two obligate parthenogenetic natural interspecific hybrids: the diploid B. whitei and the triploid B. lynceorum. B. whitei shows two maturation… Expand
Sex chromosomes and origin of males and sex mosaics of the parthenogenetic stick insect Carausius morosus Br.
The chromosome complements of sporadic males and masculinized females of the thelytokous phasmid Carausius morosus Br. could be analysed in spermatogonia and ovarian follicle cells. Masculinized… Expand
Cytology of parthenogenesis of five Meloidogyne species
Oogenesis was investigated using a fluorescent staining technique with Hoechst 33258 in several isolates of facultative meiotic parthenogenetic -Meloidogyne hapla race A, M. chitwoodi, M. fallax -… Expand
Chromosome elimination and mutation in tetraploid somatic hybrids ofSolanum tuberosum andSolanum phureja
- L. P. Pijnacker, M. A. Ferwerda, K. J. Puite, J. Schaart
- Biology, Medicine
- Plant Cell Reports
- 1 February 1989
The hybridity of eleven somatic hybrids between a diploidS. tuberosum and a diploidS. phureja clone could be verified because the parent karyotypes differed in their C-banding patterns. The hybrids… Expand
The cytology, sex determination and parthenogenesis of Carausius morosus (Br.)
- L. P. Pijnacker
Effect of sucrose on polyploidization in early callus cultures of Solanum tuberosum
Leaf segments of a monohaploid, dihaploid and tetraploid genotype of the potato (Solanum tuberosum; x = 12) were cultured on callus-inducing medium with 10, 20, 30 or 40 gl−1 sucrose. After 5 and 7… Expand
Multiple supernumerary chromosomes in the pseudogamous parthenogenetic flatworm Polycelis nigra: lineage markers or remnants of genetic leakage?
Polycelis nigra is a free-living simultaneous hermaphroditic flatworm that has amphimictic and pseudogamous parthenogenetic biotypes. Sexual individuals are always diploid (2n = 16) and pseudogamous… Expand