Results 91 to 100 of about 25,396 (250)

Parthenogenesis in birds: a review.

Reproduction, 2018
Parthenogenesis or 'virgin birth' is embryonic development in unfertilized eggs. It is a routine means of reproduction in many invertebrates. However, even though parthenogenesis occurs naturally in even more advanced vertebrates, like birds, it is ...
R. Ramachandran, C. Mcdaniel
semanticscholar   +1 more source

Developmental expression of Ap‐Vas proteins in aphids and flies reveals their evolutionary roles in insects

Insect Molecular Biology, EarlyView.
Duplication of vas genes is universally observed in aphids, and phylogenetic analysis indicates that this event predates the divergence of Aphididae and Phylloxeridae. Ap‐vas1 is germline‐specific, whereas Ap‐vas2–4 exhibit somatic expression, indicating functional divergence during aphid embryogenesis.
Gee‐Way Lin, Szu‐Chieh Wang, Charles E. Cook, Ming‐Der Lin, Chun‐che Chang   +4 more
wiley   +1 more source

Hurdles in investigating UVB damage in the putative ancient asexual Darwinula stevensoni (Ostracoda, Crustacea) [PDF]

, 2013
Ostracoda or mussel-shrimps are small, bivalved Crustacea. Because of their excellent fossil record and their broad variety of reproductive modes, ostracods are of great interest as a model group in ecological and evolutionary research.
Martens, Koenraad, Schön, Isa, Van den Broecke, Lynn, Vanfleteren, Jacques   +3 more
core  

Parthenogenesis in Hexapoda: holometabolous insects

, 2018
This study is a second part of a review on parthenogenesis in Hexapoda. In contrast to the first part describing parthenogenetic groups of Entognatha and non-holometabolous insects (Journal of Zoological Systematics and Evolutionary Research, 54, 2016 ...
V. Gokhman, V. Kuznetsova
semanticscholar   +1 more source

Potential of the Predatory Mites Gamasellodes lavafesii (Mesostigmata: Ascidae) and Cosmolaelaps mediocuspis (Mesostigmata: Laelapidae) on Different Soil Pests/Parasites and Alternative Prey for Large‐Scale Rearing

Journal of Applied Entomology, EarlyView.
ABSTRACT Many species of Mesostigmata soil mites have potential as biological control agents of pests/parasites. This study evaluated the predation potential of two of these species, Gamasellodes lavafesii (Ascidae) and Cosmolaelaps mediocuspis (Laelapidae).
A. R. A. Barros, J. P. I. Martin, G. J. Moraes, M. M. Inomoto, R. C. Castilho   +4 more
wiley   +1 more source

Comparative analysis of fecundity in close amphimictic Aporrectodea сaliginosa and apomictic A. trapezoides earthworms, and the problem of reproductive advantages of parthenogenetic animals.

Zoodiversity, 2020
The comparative analysis of fecundity and fertility was studied experimentally for the amphimictic Aporrectodea caliginosa diploid earthworms and the close parthenogenetic A. trapezoides triploid earthworms during two seasons. The individual fecundity of
S.V. Mezhzherin, Yu.Yu. Chayka, S.V. Kokodiy, A.A. Tsyba   +3 more
doaj   +1 more source

Hybrid sorghum breeding in China: A historical review and perspectives

Journal of Integrative Plant Biology, EarlyView.
To commemorate the 60th anniversary of the promotion and application of three‐line hybrid sorghum in China, this review highlights pivotal scientific breakthroughs, systematically summarizes the progress in hybrid sorghum breeding and dwarf sorghum breeding in the country, and presents an outlook on the future of sorghum breeding.
Xiangxiang Meng, Lu Li, Qian Qian, Liang Jiang, Zhaosheng Kong   +4 more
wiley   +1 more source

Oocyte activation and preimplantation development of bovine embryos obtained by specific inhibition of cyclin-dependent kinases Ativação oocitária e desenvolvimento pré-implantação de embriões bovinos obtidos com o uso de inibidores específicos das quinases dependentes de ciclina

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2007
The efficiency of bohemine and roscovitine in combination with ionomycin on parthenogenetic activation and initial embryonic development of bovine oocytes was studied.
F. Perecin, S.C. Méo, C.L.V. Leal, J.M. Garcia   +3 more
doaj   +1 more source

Induction of Synthetic Apomixis in Two Sorghum Hybrids Enables Seed Yield and Genotype Preservation Over Multiple Generations

Plant Biotechnology Journal, EarlyView.
ABSTRACT Induction of apomixis, or clonal reproduction through seed, could economise commercial hybrid seed production and enable smallholder farmers to save and sow hybrid seed. Here, we demonstrate the synthetic induction of apomixis in two sorghum hybrids and show that the clonal hybrid seed can be maintained across multiple seed generations.
Marissa K. Simon, Li Yuan, Ping Che, Kevin Day, Todd Jones, Ian D. Godwin, Anna M. G. Koltunow, Marc C. Albertsen   +7 more
wiley   +1 more source

Partitioning Apomixis Components to Understand and Utilize Gametophytic Apomixis

Frontiers in Plant Science, 2019
Apomixis is a method of reproduction to generate clonal seeds and offers tremendous potential to fix heterozygosity and hybrid vigor. The process of apomictic seed development is complex and comprises three distinct components, viz., apomeiosis (leading ...
Pankaj Kaushal, Krishna K. Dwivedi, Auji Radhakrishna, Manoj K. Srivastava, Vinay Kumar, Ajoy Kumar Roy, Devendra R. Malaviya   +6 more
doaj   +1 more source