Results 101 to 110 of about 35,869 (203)

Meiotic abnormalities in metaphase I human spermatocytes from infertile males: frequencies, chromosomes involved, and the relationships with polymorphic karyotype and seminal parameters

open access: yesAsian Journal of Andrology, 2014
The aim of this study was to look in depth at the relationship between meiotic anomalies and male infertility, such as the determination of the chromosomes involved or the correlation with patient features.
Zaida Sarrate   +2 more
doaj   +1 more source

The Development and Meiotic Behavior of Asymmetrical Isochromosomes in Wheat [PDF]

open access: yesGenetics, 1997
To determine which segments of a chromosome arm are responsible for the initiation of chiasmate pairing in meiosis, a series of novel isochromosomes was developed in hexaploid wheat (Triticum aestivum L.). These isochromosomes are deficient for different terminal segments in the two arms.
openaire   +2 more sources

Spatially explicit non-Mendelian diploid model

open access: yes, 2009
We introduce a spatially explicit model for the competition between type $a$ and type $b$ alleles. Each vertex of the $d$-dimensional integer lattice is occupied by a diploid individual, which is in one of three possible states or genotypes: $aa$, $ab ...
Lanchier, N., Neuhauser, C.
core   +1 more source

Meiotic behavior as a selection tool in silage corn breeding

open access: yesGenetics and Molecular Research, 2010
In breeding programs, commercial hybrids are frequently used as a source of inbred lines to obtain new hybrids. Considering that maize production is dependent on viable gametes, the selection of populations to obtain inbred lines with high meiotic stability could contribute to the formation of new silage corn hybrids adapted to specific region.
V F, Souza   +4 more
openaire   +2 more sources

Chromosome numbers, meiotic behavior and pollen fertility in a collection of Paspalum nicorae Parodi accessions [PDF]

open access: yesCrop Breeding and Applied Biotechnology, 2008
Chromosome number, meiotic behavior and pollen viability were evaluated in a collection of 53 Paspalumnicorae Parodi accessions, which are part of a breeding project of the species.
Camila Aparecida de Oliveira dos Reis   +2 more
doaj  

Functional Analysis of MicroRNA Pathway Genes in the Somatic Gonad and Germ Cells During Ovulation in \u3cem\u3eC. Elegans\u3c/em\u3e [PDF]

open access: yes, 2017
MicroRNAs (miRNAs) are post-transcriptional regulators of gene expression that play critical roles in animal development and physiology, though functions for most miRNAs remain unknown.
Abbott, Allison L.   +3 more
core   +1 more source

Corrigendum: Revisiting Meiosis in Sugarcane: Chromosomal Irregularities and the Prevalence of Bivalent Configurations

open access: yesFrontiers in Genetics, 2019
Maria Lucia C. Vieira   +9 more
doaj   +1 more source

Reproductive studies on ipecac (Cephaelis ipecacuanha (Brot.) A. Rich; Rubiaceae): meiotic behavior and pollen viability

open access: yesBrazilian Journal of Biology
Reproductive studies were carried out on Brazilian accessions of ipecac, Cephaelis ipecacuanha. Meiotic behavior was studied using the squashing technique.
M. M. Souza   +3 more
doaj   +1 more source

MEIOTIC CHROMOSOME BEHAVIOR OF AN INVERTED INSERTIONAL TRANSLOCATION IN NEUROSPORA

open access: yesGenetics, 1972
ABSTRACT Cytological study of meiotic chromosomes heterozygous for the T(I⇉II)39311 translocation confirm genetic evidence (Perkins 1972) that a section of linkage group I including the mating type locus has been inserted into linkage group II.
openaire   +2 more sources

Citogenética de especies de Vasconcellea (Caricaceae)

open access: yesActa Agronómica, 2008
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Caetano Creucí María   +4 more
doaj  

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