Results 11 to 20 of about 17,124 (228)
Meiotic abnormalities in infertile males [PDF]
Cytogenetic and Genome Research, 2005 Meiotic anomalies, as reviewed here, are synaptic chromosome abnormalities, limited to germ cells that cannot be detected through the study of the karyotype. Although the importance of synaptic errors has been underestimated for many years, their presence is related to many cases of human male infertility.
Egozcue, Josep +8 more
openaire +4 more sources
Chromosome numbers and meiotic behavior of some Paspalum accessions [PDF]
Genetics and Molecular Biology, 2005 Chromosome number and meiotic behavior were evaluated in 36 Brazilian accessions of the grass Paspalum (which had never previously been analyzed) to determinate which accessions might be useful in interspecific hybridizations.
Eleniza de Victor Adamowski +4 more
doaj +2 more sources
Meiotic analysis in induced tetraploids of Brachiaria decumbens Stapf [PDF]
Crop Breeding and Applied Biotechnology, 2011 The meiotic behavior of three tetraploid plants (2n=4x=36) originated from somatic chromosome duplication of sexually reproducing diploid plants of Brachiaria decumbens was evaluated. All the analyzed plants presented abnormalities related to polyploidy,
Carine Simioni, Cacilda Borges do Valle
doaj +6 more sources
Crop Breeding and Applied Biotechnology, 2002 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 ...
Maria Suely Pagliarini +3 more
doaj +2 more sources
Frontiers in Cell and Developmental Biology, 2023 Nuclear Pore Complexes (NPCs) are embedded in the nuclear envelope (NE), regulating macromolecule transport and physically interacting with chromatin. The NE undergoes dramatic breakdown and reformation during plant cell division.
Nadia Fernández-Jiménez +5 more
doaj +2 more sources
Roles of Meiotic Defects in Pathogenesis of Primary Ovarian Insufficiency
Reproductive and Developmental Medicine, 2017 A matured oocyte has experienced three critical division stages: (1) proliferation in early fetal stage, (2) meiotic arrest at diplotene of prophase I, and (3) meiotic resumption and extrusion of the first polar body.
Ling Zhang +3 more
doaj +2 more sources
Meiotic behavior of wild Caricaceae species potentially suitable for papaya improvement
Crop Breeding and Applied Biotechnology, 2012 The purpose of this study was to evaluate the meiotic behavior and determine the meiotic index and pollen viability of representative plants of the wild species V. goudotiana, V. quercifolia and J. spinosa. Meiotic analysis confirmed that the species are
Emanuelli Narducci da Silva +3 more
doaj +3 more sources
Cytological analysis for meiotic patterns in wild rice (Oryza rufipogon Griff.)
Biotechnology Reports, 2017 The present report explores the chromosomal patterns during meiosis as a fundamental cell division study in wild rice (Oryza rufipogon Griff.). Cytological assays revealed normal meiosis in most cases but in some instances meiotic abnormalities such as ...
Sutanu Sarkar +2 more
doaj +2 more sources
Unraveling the meiotic puzzle: chromosome count, meiotic behaviour, and reproductive challenges in Phlomis cashmeriana Royle ex Benth. from the Kashmir Himalaya [PDF]
Frontiers in Conservation ScienceMeiotic stability is crucial for maintaining reproductive success and genetic diversity in plants, especially in montane regions like the Himalaya, where fluctuating environmental conditions can disrupt normal chromosome behavior.
Roof Ul Qadir +5 more
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Meiotic behavior of several Brazilian soybean varieties
Genetics and Molecular Biology, 2000 Despite the importance of soybeans little cytogenetic work has traditionally been done, due to the small size and apparent similarity of the chromosomes. Fifteen soybean [Glycine max (L.) Merrill] varieties adapted for cultivation in two distinct regions
Bione Nilton Cesar Pires +2 more
doaj +1 more source