Meiotic abnormalities affect genetic constitution and pollen viability in dicots from Indian cold deserts [PDF]
BMC Plant Biology, 2019 Background Meiotic abnormalities lead to morphological and genetic variations which caused not only to evolution but also intraspecific reproductive barriers.
Dalvir Kaur, Vijay Kumar Singhal
exaly +4 more sources
KIF2C Deletion Causes Meiotic Abnormalities and Nonobstructive Azoospermia in Mice [PDF]
Reproductive Medicine and BiologyPurpose Kinesin Family Member 2C (KIF2C) is a key regulator of microtubule dynamics and chromosome segregation in mitosis. However, its role in spermatogenesis remains unclear.
Hiroaki Kitakaze +12 more
doaj +5 more sources
Meiotic abnormalities and spermatogenic parameters in severe oligoasthenozoospermia [PDF]
Human Reproduction, 1999 The incidence of meiotic abnormalities and their relationship with different spermatogenic parameters was assessed in 103 male patients with presumably idiopathic severe oligoasthenozoospermia (motile sperm concentration < or = 1.5 x 10(6)/ml). Meiosis on testicular biopsies was independently evaluated by two observers. Meiotic patterns included normal
Anna Veiga
exaly +3 more sources
Chromosomal Roadblocks in Male Fertility: Mechanisms, Risk Factors and Syndromes [PDF]
MedicinaMale infertility affects nearly 15% of couples worldwide, with chromosomal abnormalities representing a major underlying cause. This review explores how numerical and structural chromosomal anomalies, along with environmental exposures, lifestyle factors,
Achilleas G. Mitrakas +6 more
doaj +2 more sources
Meiotic chromosome abnormalities in fertile men: are they increasing?
Fertility and Sterility, 2011 To determine the basal frequencies of meiotic chromosome abnormalities in fertile men.Descriptive design.Research university laboratory and clinical andrology service.Seventeen fertile donors undergoing vasectomy.Analysis of testicular biopsies.Meiotic chromosome abnormalities in metaphase I spermatocytes.A total of 1,407 spermatocytes I was analyzed ...
Osvaldo Rajmil, C Templado
exaly +4 more sources
Searching for mechanisms behind meiotic abnormalities in Crotalaria spectabilis Roth
Ciência e Agrotecnologia, 2022 The identification of epigenetic marks associated with problems in the meiotic process can enlighten the mechanisms underlying the irregularities and the impacts in the genetic constitution of gametes.
Guilherme Tomaz Braz +4 more
doaj +4 more sources
Passiflora cristalina and Passiflora miniata: meiotic characterization of two wild species for use in breeding [PDF]
Crop Breeding and Applied Biotechnology, 2017 Passiflora cristalina and Passiflora miniata are two new wild species found in the southern Amazon region. This study aimed to analyze the meiotic behavior of the two species, by meiotic analysis, meiotic index and pollen grain viability, using routine ...
Telma Nair Santana Pereira +3 more
doaj +1 more source
CYTOMIXIS AND MEIOTIC ABNORMAL BEHAVIOR RELATED IN SOME SELECTED SPECIES OF THE GENUS Salvia L. (Lamiaceae) FROM IRAN [PDF]
Acta Scientifica Malaysia, 2022 In this research, the cytogenetic characteristics, phases of meiosis, abnormality during meiosis, variety of pollen grains, and cytomixis phenomenon have been studied. Populations of 10 species belonging to Salvia L.
Behnaz Alijanpoor, Masoumeh Safaeishakib
doaj +1 more source
Meiotic Chromosomal Abnormality Detected in a Heterozygote of Elymus nutans
Frontiers in Plant Science, 2022 Elymus nutans is an allopolyploid with a genome constitution of StStYYHH (2n = 6x = 42). Highly frequent intergenomic translocations and chromosomal variations with repeat amplification and deletions in E. nutans have been identified in the previous studies. However, more complicated structural variations such as chromosomal inversions or intra-genomic
Bo Liu +5 more
openaire +3 more sources
A genetic basis for a postmeiotic X versus Y chromosome intragenomic conflict in the mouse. [PDF]
, 2012 Intragenomic conflicts arise when a genetic element favours its own transmission to the detriment of others. Conflicts over sex chromosome transmission are expected to have influenced genome structure, gene regulation, and speciation.
Affara, Nabeel A. +5 more
core +10 more sources