A widely accepted hypothesis is that parthenogenesis is an evolutionary dead end since it is selectively advantageous in the short term only but results in lowered diversification rates. Triploid apomictic parthenogenesis might represent an exception, as in favorable environments, triploid females are able to produce rare males and diploid females. The aim of the present study was to analyze the modes of reproduction and their evolutionary implications in the parthenogenetic psyllid (Flor, 1861) from Fennoscandia.
View Article and Find Full Text PDFis one of the most common intracellular bacteria; it infects a wide variety of insects, other arthropods, and some nematodes. is ordinarily transmitted vertically from mother to offspring and can manipulate physiology and reproduction of their hosts in different ways, e.g.
View Article and Find Full Text PDFBased on chromosomal, molecular and morphological analyses, two new Ossiannilsson, 1970 species are described, S. Nokkala & Ch. Nokkala, and S.
View Article and Find Full Text PDFCharacteristics of parthenogenesis in (Flor, 1861) were analyzed using cytological and molecular approaches. In all three populations studied from Finland, i.e.
View Article and Find Full Text PDFUsing a cytological approach, diploid females were found coexisting with rare males in triploid apomictic parthenogenetic populations of the psyllid Cacopsylla myrtilli (W. Wagner, 1947) in Norway, Sweden, Finland and northwest Russia. Diploid females were easily distinguished from triploid apomictic females by the presence of 13 chiasmate bivalents instead of 39 univalent chromosomes at metaphase I.
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