Results 71 to 80 of about 343,749 (184)

Anther development and pollen fertility in a polyploid cultivar of Platanus × acerifolia Willd. 'Huanong Panlong'

Ornamental Plant Research
Platanus, a key species in urban landscaping, is a classic allopolyploid with three distinct subgenomes. Polyploidization often induces meiotic irregularities, offering promising opportunities for breeding improved ornamental cultivars with suppressed ...
Zhiru Bao, Hui Long, Bei Li, Changsheng Shao, Jiaqi Zhang, Manzhu Bao   +5 more
doaj   +1 more source

Histone H2AFX Links Meiotic Chromosome Asynapsis to Prophase I Oocyte Loss in Mammals.

PLoS Genetics, 2015
Chromosome abnormalities are common in the human population, causing germ cell loss at meiotic prophase I and infertility. The mechanisms driving this loss are unknown, but persistent meiotic DNA damage and asynapsis may be triggers.
Jeffrey M Cloutier, Shantha K Mahadevaiah, Elias ElInati, André Nussenzweig, Attila Tóth, James M A Turner   +5 more
doaj   +1 more source

Influence of spermatogenic profile and meiotic abnormalities on reproductive outcome of infertile patients

Reproductive BioMedicine Online, 2005
Genetic aspects of male infertility and the possible risks of new assisted reproduction and their influence on the development of zygotes and children born after intracytoplasmic sperm injection (ICSI) need further research. These patients have an increased risk of diploidy, and disomies are frequent in their spermatozoa.
Pedro N, Barri, Jose M, Vendrell, Francisca, Martinez, Buenaventura, Coroleu, Begoña, Arán, Anna, Veiga   +5 more
openaire   +2 more sources

Recurrence of multiple meiotic abnormalities in maize genotypes from the same origin and their influence on productivity. [PDF]

, 2018
The frequency of meiotic abnormalities among single-, double- and three-way cross experimental hybrids and their parental inbred lines is studied. Among the sixteen inbred lines examined, fifteen originated from populations developed at the National ...
MEIRELLES, W. F., PEREIRA, J. E., PAGLIARINI, M. S., DEFANI, M. A.   +3 more
core  

The chromosomal challenge of human embryos: Mechanisms and fundamentals

HGG Advances
Summary: Chromosomal abnormalities in human pre-implantation embryos, originating from either meiotic or mitotic errors, present a significant challenge in reproductive biology.
Anna Ivanova, Elena Korchivaia, Maria Semenova, Igor Lebedev, Ilya Mazunin, Ilya Volodyaev   +5 more
doaj   +1 more source

Altered cohesin gene dosage affects Mammalian meiotic chromosome structure and behavior.

PLoS Genetics, 2013
Based on studies in mice and humans, cohesin loss from chromosomes during the period of protracted meiotic arrest appears to play a major role in chromosome segregation errors during female meiosis.
Brenda Murdoch, Nichole Owen, Michelle Stevense, Helen Smith, So Nagaoka, Terry Hassold, Michael McKay, Huiling Xu, Jun Fu, Ekaterina Revenkova, Rolf Jessberger, Patricia Hunt   +11 more
doaj   +1 more source

Percentage of meiotic abnormalities in the genitors and hybrids of Urochloa humidicola, based on [44].

, 2016
Percentage of meiotic abnormalities in the genitors and hybrids of Urochloa humidicola, based on [44].
Leticia Jungmann (2623219), Cacilda B. do Valle (2623204), Anete P. Souza (696538), Marcelo Mollinari (182552), Maria Suely Pagliarini (2623213), Antonio A. F. Garcia (2623207), Jean C. S. Santos (2623210), Maria M. Pastina (2623216), Bianca B. Z. Vigna (2623201)   +8 more
core   +1 more source

Meiotic behavior in Panicum maximum Jacq. (Poaceae: Panicoideae: Paniceae): hybrids and their genitors - doi: 10.4025/actasciagron.v32i3.6461

Acta Scientiarum. Agronomy, 2010
Panicum maximum Jacq. is one of the most cultivated grasses in the world. The intraspecific hybridization breeding program underway at Embrapa Beef Cattle aims at combining several agronomic characteristics in a single plant with high seed production ...
Cleide Pessim, Maria Suely Pagliarini, Liana Jank, Alice Maria de Souza Kaneshima, Andréa Beatriz Mendes Bonato   +4 more
doaj   +1 more source

Anthropogenic Impacts on Meiosis in Plants

Frontiers in Plant Science, 2018
As the human population grows and continues to encroach on the natural environment, organisms that form part of such ecosystems are becoming increasingly exposed to exogenous anthropogenic factors capable of changing their meiotic landscape.
Lorenz K. Fuchs, Glyn Jenkins, Dylan W. Phillips   +2 more
doaj   +1 more source

Análise invasiva e não invasiva do fuso meiótico de oócitos humanos obtidos de ciclos estimulados: dados preliminares Invasive and noninvasive analysis of the meiotic spindle of human oocytes obtained from stimulate cycles: preliminary results

Revista Brasileira de Ginecologia e Obstetrícia, 2012
OBJETIVOS: Avaliar a concordância entre as técnicas de microscopia de polarização e microscopia confocal na avaliação do fuso meiótico de oócitos humanos maturados in vivo.
Luciana Azôr Dib, Michele Gomes da Broi, Maria Cristina Picinato Medeiros de Araújo, Roberta Cristina Giorgenon, Rui Alberto Ferriani, Paula Andrea de Albuquerque Sales Navarro   +5 more
doaj   +1 more source