Results 121 to 130 of about 1,287 (146)

New insights on facultative parthenogenesis in pythons [PDF]

Biological Journal of the Linnean Society, 2014
Warren Booth, Gordon W Schuett, Todd A Castoe   +2 more
exaly   +2 more sources

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Facultative deuterotokous parthenogenesis in Callosobruchus maculatus

Zoologischer Anzeiger, 2021
Abstract The seed beetle, Callosobruchus maculatus (Coleoptera: Chrysomelidae), is a severe cosmopolitan pest of various stored legumes. Since no parthenogenesis has been reported in the genus Callosobruchus, here we report the evidence of a rare event of deuterotokous parthenogenesis in this species.
Azam Amiri, Ali R. Bandani
openaire   +1 more source

Microarray analysis and PCR validation of genes associated with facultative parthenogenesis in Meleagris gallopavo (Turkey)

Theriogenology, 2022
A cDNA microarray containing 43,661 differentially expressed genes was carried out on the blastoderm of fertilized and facultative parthenogenic turkey embryos at different hours of development. The total number of up-regulated (UR) and down-regulated (DR) genes at 0, 12, and 24 h of development were 725 and 1436, 942 and 599, and 589 and 1044 ...
Akshat Goel, Manish Mehra, Sadhan Bag
exaly   +3 more sources

Facultative parthenogenesis and sex-ratio evolution

Evolutionary Ecology, 1987
Phenotypic models of selection are used to determine the effect of facultative parthenogenesis on the production of males in a spatially variable environment when (i) sex determination is under strict genetic control, and (ii) when sex may be environmentally determined.
Curtis M Lively, Lively Curtis M
exaly   +2 more sources

Cytotype stability, facultative apomixis and geographical parthenogenesis in Ranunculus kuepferi (Ranunculaceae) [PDF]

Annals of Botany, 2010
Asexual organisms are more widespread in previously glaciated areas than their sexual relatives ('geographical parthenogenesis'). In plants, this pattern is probably dependent on reproductive isolation and stability of cytotypes within their respective distribution areas. Both partial apomixis and introgressive hybridization potentially destabilize the
Elvira Hörandl, Hörandl Elvira
exaly   +3 more sources

Virgin Birth: A genetic basis for facultative parthenogenesis

2022
Abstract Sexual reproduction evolved 1-2 billion years ago and underlies the biodiversity of our planet. Nevertheless, devolution of sexual into asexual reproduction can occur across all phyla of the animal kingdom. The genetic basis for how parthenogenesis can arise is completely unknown.
A. L. Braun, D. K. Fabian, E. Garrison, D. M. Glover   +3 more
openaire   +1 more source

Facultative Parthenogenesis in Vertebrates: Reproductive Error or Chance?

Sexual Development, 2008
Parthenogenesis, the development of an embryo from a female gamete without any contribution of a male gamete, is very rare in vertebrates. Parthenogenetically reproducing species have, so far, only been found in the Squamate reptiles (lizards and snakes).
openaire   +2 more sources

Can facultative parthenogenesis occur in biparental mealybug species?

Phytoparasitica, 2009
The existence of facultative parthenogenesis in mealybugs has been reported by different authors and questioned by others in relation to certain species. We tested the hypothesis of facultative parthenogenesis in relation to three mealybug species, Planococcus citri (Risso), Pseudococcus calceolariae (Maskell) and Pseudococcus viburni (Signoret).
Elsa Borges da Silva, Zvi Mendel, José Carlos Franco   +2 more
openaire   +1 more source

Facultative Parthenogenesis in Collembola (Insecta)

Nature, 1960
PARTHENOGENESIS in insects is well known, and its occurrence in the class is fairly widespread. In the order Collembola (the springtails) its presence has been suggested on rather disputable grounds and then afterwards denied on more than one occasion1.
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Haploid facultative parthenogenesis in sunflower sexual reproduction

Nature
Flowering plant sexual reproduction requires double fertilization, yielding embryo and endosperm seed compartments: the latter supports embryo growth and seed germination. In an experiment to generate haploid embryos through inhibition of pollen phospholipase activity in sunflower (Helianthus annus), we serendipitously discovered that emasculated ...
Jian Lv, Dawei Liang, Eric Bumann, Virginie Mirleau Thebaud, Huaibing Jin, Changbao Li, Clemence Paris, Yinghui Dan, Chao Li, Ruijie Cui, Xianxia Chen, David Szwerdszarf, Peter Wittich, Bobby Clegg, Agustin Tassara, Hongmei Dan, Xiaolong Tian, Zhiqiang Liu, Wen Cai, Bin Sun, Jared Carter, Paul Drayton, Federico Bock, Timothy Kelliher   +23 more
openaire   +2 more sources