Results 121 to 130 of about 547 (142)
Some of the next articles are maybe not open access.
THELYTOKOUS PARTHENOGENESIS IN CEPHUS CINCTUS NORT.: A CRITICISM
The Canadian Entomologist, 1938I have read with great interest C. W. Farstad's paper (1938) on “Thelyotokous parthenogenesis in Cephus cinctus Nort.,” since it parallels so closely my own problem in Diprion polytomum Hartig. But, whilst agreeing with his final conclusion that there are doubtless two forms of C. cinctus manifesting alternative modes of parthenogenetic reproduction in
openaire +1 more source
Thelytokous parthenogenesis in the damselfly Ischnura hastata (Odonata, Coenagrionidae): genetic mechanisms and lack of bacterial infection [PDF]
Heredity, 2009 Thelytokous parthenogenesis, the production of female-only offspring from unfertilized eggs, has been described in all the insect orders, but is a rare phenomenon in the Odonata (dragonflies and damselflies). The only-known case of parthenogenesis in this group is the North American damselfly species Ischnura hastata, which has parthenogenetic ...
Lorenzo Carballa, María Olalla +1 more
exaly +4 more sources
Thelytokous Parthenogenesis in the AntMyrmecina nipponica(Hymenoptera: Formicidae)
Zoological Science, 2014Myrmecina nipponica Wheeler is a terrestrial ant nesting chiefly in the soil in forest. It is a specialized predator of oribatid mites, but also scavenges on a broad spectrum of other arthropods. In the studied population at Cape Manazuru in central Japan, M. nipponica colonies are typically monogynous, and previous dissections of queens suggested that
openaire +2 more sources
Experimental and Applied Acarology, 1990
Based on available sex-ratio data, and a few published laboratory proofs, it appears that thelytokous parthenogenesis is probably widespread in the oribatid mites. It is especially common in early-derivative taxa, such as the Desmonomata, where it seems to characterize whole families. Fifteen species of that group were proven capable of parthenogenesis
Sandra C. Palmer, Roy A. Norton
openaire +1 more source
Based on available sex-ratio data, and a few published laboratory proofs, it appears that thelytokous parthenogenesis is probably widespread in the oribatid mites. It is especially common in early-derivative taxa, such as the Desmonomata, where it seems to characterize whole families. Fifteen species of that group were proven capable of parthenogenesis
Sandra C. Palmer, Roy A. Norton
openaire +1 more source
Nature, 1953
PARTHENOGENESIS occurs naturally in several orders of insects, and can conveniently be classified according to the sex of the offspring which develop from the unfertilized egg: (1) arrhenotoky—males only (fertilized eggs give rise to females); (2) thelytoky—females only; (3) amphitoky—both sexes.
openaire +2 more sources
PARTHENOGENESIS occurs naturally in several orders of insects, and can conveniently be classified according to the sex of the offspring which develop from the unfertilized egg: (1) arrhenotoky—males only (fertilized eggs give rise to females); (2) thelytoky—females only; (3) amphitoky—both sexes.
openaire +2 more sources
2021
Thelytokous reproduction by dealate queens in Monomorium hiten Terayama, 1996, collected from four islands of the Nansei Islands (Okinawa Prefecture, Japan) was confirmed in the field and laboratory. Dissection revealed that all dealate queens (N = 38) found in nine field collected colonies were uninseminated.
Fuminori Ito +5 more
openaire +1 more source
Thelytokous reproduction by dealate queens in Monomorium hiten Terayama, 1996, collected from four islands of the Nansei Islands (Okinawa Prefecture, Japan) was confirmed in the field and laboratory. Dissection revealed that all dealate queens (N = 38) found in nine field collected colonies were uninseminated.
Fuminori Ito +5 more
openaire +1 more source
Entomological Science, 2017
AbstractOnly recently has it become clear that several species of eusocial hymenopterans regularly reproduce by thelytokous parthenogenesis, that is, the production of diploid female offspring by unmated females. This phenomenon suggests that parthenogenetic reproduction might be advantageous to organisms under certain environmental conditions.
Ching‐Chen Lee +3 more
openaire +1 more source
AbstractOnly recently has it become clear that several species of eusocial hymenopterans regularly reproduce by thelytokous parthenogenesis, that is, the production of diploid female offspring by unmated females. This phenomenon suggests that parthenogenetic reproduction might be advantageous to organisms under certain environmental conditions.
Ching‐Chen Lee +3 more
openaire +1 more source
The Evolutionary Genetics of Thelytokous Parthenogenesis in Eusocial Hymenoptera
2014The phenomenon of thelytoky, the asexual production of diploid female offspring, is being increasingly uncovered among the eusocial Hymenoptera. Thelytoky is associated with a number of fascinating and novel reproductive systems. In this thesis I investigate the evolutionary and genetic consequences of thelytokous parthenogenesis, with particular focus
openaire +1 more source