Results 31 to 40 of about 17,124 (228)

Exposure to low-dose bisphenol A impairs meiosis in the rat seminiferous tubule culture model: a physiotoxicogenomic approach.

PLoS ONE, 2014
BackgroundBisphenol A (BPA) is one of the most widespread chemicals in the world and is suspected of being responsible for male reproductive impairments. Nevertheless, its molecular mode of action on spermatogenesis is unclear.
Sazan Ali, Gérard Steinmetz, Guillaume Montillet, Marie-Hélène Perrard, Anderson Loundou, Philippe Durand, Marie-Roberte Guichaoua, Odette Prat   +7 more
doaj   +1 more source

Abnormal meiotic recombination with complex chromosomal rearrangement in an azoospermic man [PDF]

Reproductive BioMedicine Online, 2015
Spermatocyte spreading and immunostaining were applied to detect meiotic prophase I progression, homologous chromosome pairing, synapsis and recombination in an azoospermic reciprocal translocation 46, XY, t(5;7;9;13)(5q11;7p11;7p15;9q12;13p12) carrier.
Liu Wang, Furhan Iqbal, Guangyuan Li, Xiaohua Jiang, Ihtisham Bukhari, Hanwei Jiang, Qingling Yang, Liangwen Zhong, Yuanwei Zhang, Juan Hua, Howard J. Cooke, Qinghua Shi   +11 more
openaire   +2 more sources

Chromosomal abnormalities predisposing to infertility, testing, and management: a narrative review

Bulletin of the National Research Centre, 2021
Background Much interest has not been placed on the role of chromosomal abnormalities in the pathogenesis and rising prevalence of infertility in recent times.
Tajudeen O. Yahaya, Esther O. Oladele, Daniel Anyebe, Chidiebere Obi, M. D. A. Bunza, Ridwan Sulaiman, Usman U. Liman   +6 more
doaj   +1 more source

Microsporogenesis associated with seed yield in Urochloa sexual polyploid hybrids

Crop Breeding and Applied Biotechnology, 2021
High seed yield is a fundamental characteristic of apomictic and sexual hybrids of the genus Urochloa P. Beauv. (syn. Brachiaria (Trin.) Griseb.).
Andréa Beatriz Diverio Mendes, Celina de Medeiros Ragalzi, Rosangela Maria Simeão, Jaqueline Rosimeire Verzignassi, Cacilda Borges do Valle, Maria de Fatima Pires da Silva Machado   +5 more
doaj  

Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae)

Caryologia, 2019
The current paper analyzes the male meiotic behavior in wild populations of Buddleja iresinoides and Castilleja arvensis from Piedmont areas of the Northwest Region of Argentina. Castilleja arvensis showed tetraploid number of chromosome of 2n = 24.
Aldo Ruben Andrada, Valeria de los Ángeles Páez, M.S. Caro, P. Kumar   +3 more
doaj   +1 more source

Cytomixis and associated meiotic abnormalities affecting pollen fertility in Clematis orientalis

, 2010
Present cytological investigations from the cold desert regions of Lahaul-Spiti and Kinnaur (India) record the first ever tetraploid (2n=32) chromosome count and cytomixis in Clematis orientalis L. var. acutifolia Hook. f. et Thoms.
S. Kaur, V. K. Singhal, D. Kaur, P. Kumar   +3 more
core   +1 more source

Preimplantation genetic diagnosis in patients with male meiotic abnormalities

Reproductive BioMedicine Online, 2004
Indications and candidates for preimplantation genetic diagnosis (PGD) have increased in recent years. This study evaluates whether IVF-intracytoplasmic sperm injection (ICSI) results could be improved by selecting embryos through PGD-AS (aneuploidy screening) in couples in whom the male partner presents meiotic abnormalities. Two hundred and fifty-six
B, Aran, A, Veiga, F, Vidal, M, Parriego, J M, Vendrell, J, Santaló, J, Egozcue, P N, Barri   +7 more
openaire   +2 more sources

Meiotic abnormalities in ‘Jinzhui’.

, 2013
Meiotic abnormalities in ‘Jinzhui’.
Maofu Li (467771), Junkai Wu (467770), Tianzhong Li (230615)   +2 more
core   +1 more source

Reproductive Isolation Between Taxonomically Controversial Forms of the Gray Voles (Microtus, Rodentia; Arvicolinae): Cytological Mechanisms and Taxonomical Implications

Frontiers in Genetics, 2021
The formation of hybrid sterility is an important stage of speciation. The voles of the genus Microtus, which is the most speciose genus of rodents, provide a good model for studying the cytological mechanisms of hybrid sterility.
Tatiana I. Bikchurina, Tatiana I. Bikchurina, Fedor N. Golenishchev, Elena A. Kizilova, Elena A. Kizilova, Ahmad Mahmoudi, Pavel M. Borodin, Pavel M. Borodin   +7 more
doaj   +1 more source

Meiotic behavior during microsporogenesis, responsible for male sterility in some species of Salvia sect. Aethiopis in Iran

Caryologia
The genus Salvia L. (Lamiaceae: tribe Mentheae) contains about 1000 species. Section Aethiopis in this genus has a distribution in the Mediterranean and central Asia and contains about 34 species in Iran.
Fatemeh Hajmoradi
doaj   +1 more source