Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 2

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  SEX
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1

Meiotic karyotypes in males of nineteen species of Psylloidea (Hemiptera) in the families Psyllidae and Triozidae

100%
Labina E. S., Maryanska-Nadachowska A., Kuznetsova V. G.
Folia Biologica
|
2007
|
vol. 55
|
issue 1-2
27-34
EN
Meiotic karyotypes in males of 16 species (assigned to 9 genera and 7 subfamilies) of the family Psyllidae and 3 species (assigned to 3 genera of the subfamily Triozinae) of the family Triozidae are described for the first time. The first data on the genus Ligustrinia are presented. All the species were shown to exhibit the modal karyotype for psyllids, 2n = 24 + X, except Bactericera nigricornis and Arytainilla spartiophila, in which 2n = 24 + XY and 2n = 22 + X were found, respectively. The karyotype of Ctenarytaina eucalypti (Psyllidae, Spondyliaspidinae) was reinvestigated, and the karyotype 2n = 10 + X, characteristic of Spondyliaspidinae, was revealed. The karyotypes of Strophingia fallax, S. arborea, and Craspedolepta topicalis were studied using the C-banding technique.
2

Cytogenetic investigations on seven Palaearctic weevil species (Coleoptera, Curculionidae)

100%
Lachowska D., Rozek M., Holecova M., Karagyan G.
Folia Biologica
|
2001
|
vol. 49
|
issue 1-2
49-52
EN
Cytogenetic investigations were carried out on seven species of bisexual weevils from five subfamilies. The following numbers of chromosomes were found in individual species: 2n=22, n_=10+Xyp in Ptochus porcellus Boh. (Otiorhynchinae); 2n=40, n_=19+Xyp in Larinodontes turbinatus Gyll. (Cleoninae); 2n=26, n_=12+Xyp in Curculio pellitus (Boh.) (Curculioninae); 2n=30, n_=14+Xyp in Acalles camelus (F.), Acalles echinatus (Germ.), Acalles hypocrita Boh. (Cryptorhynchinae), and 2n=40, n_=19+Xyp in Cionus hortulanus (Foucr.) (Mecininae). The heterochromosomes of all the examined species form, in the first meiotic metaphase, a parachute bivalent. The chromosome number and sex determining system of six species and two genera are described for the first time.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.