Results 21 to 30 of about 18,943 (253)
Crop Breeding and Applied Biotechnology, 2008 Chromosome number, meiotic behavior and pollen viability were evaluated in a collection of 53 Paspalum nicorae Parodi accessions, which are part of a breeding project of the species. All accessions are tetraploid, with 2n=4x=40.
Camila Aparecida de Oliveira dos Reis +2 more
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Brazilian Journal of BiologyReproductive studies were carried out on Brazilian accessions of ipecac, Cephaelis ipecacuanha. Meiotic behavior was studied using the squashing technique.
M. M. Souza +3 more
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Meiotic behavior and H3K4m distribution in B chromosomes of Characidium gomesi (Characiformes, Crenuchidae). [PDF]
Comp Cytogenet, 2016 Characidium gomesi Travasso, 1956 specimens from the Pardo River have up to four heterochromatic supernumerary chromosomes, derived from the sex chromosomes. To access the meiotic behavior and distribution of an active chromatin marker, males and females
Serrano ÉA +4 more
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Complex chromosomal rearrangements: origin and meiotic behavior [PDF]
Human Reproduction Update, 2011 Complex chromosomal rearrangements (CCRs) describe structural rearrangements, essentially translocations, involving at least three breakpoints on two or more chromosomes. Although they are rare in humans, their clinical identification is important since CCR carriers can display various phenotypes which include phenotypically normal subjects, infertile ...
F, Pellestor +6 more
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MEIOTIC BEHAVIOR OF ASYMMETRIC DYADS IN THE MALE DROSOPHILA [PDF]
Genetics, 1973 ABSTRACT Crossing over in the interstitial region of the heterozygous V4 translocation in Drosophila melanogaster generates asymmetric dyads each consisting of a shorter and a longer chromatid It was shown previously that in the female the shorter is recovered preferentially (ZIMMERING 1955); the present work suggests that the same ...
S, Zimmering, E B, Bendbow
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BMC Plant Biology, 2019 Background Meiosis of newly formed allopolyploids frequently encounter perturbations induced by the merging of divergent and hybridizable genomes. However, to date, the meiotic properties of allopolyploids with dysploid parental karyotypes have not been ...
Qinzheng Zhao +9 more
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Meiotic analysis of interspecific hybrids between Capsicum frutescens and Capsicum chinense [PDF]
Crop Breeding and Applied Biotechnology, 2017 The aim of this study was to observe the genetic relationship between C. frutescens (UENF 1636) and C. chinense (UENF 1785) based on the meiotic behavior, on the meiotic index, and on pollen viability of their F1 hybrids. For meiotic analysis and meiotic
Nádia Fernandes Moreira +2 more
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Meiotic behavior of Brachiaria decumbens hybrids
Genetics and Molecular Research, 2015 Brachiaria decumbens is a forage grass of inestimable value for livestock in Brazil due to its production of good quality forage even when planted on acid and poor soils, although it is susceptible to pasture spittlebugs. Only one cultivar, cv. Basilisk, has been used as the pollen donor in crosses with Brachiaria ruziziensis since 1988 at Embrapa Gado
V F, Souza +5 more
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On the origin of trisomy 21 Down syndrome [PDF]
, 2008 Background: Down syndrome, characterized by an extra chromosome 21 is the most common genetic cause for congenital malformations and learning disability.
Nikos Papadogiannakis +13 more
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Frontiers in Plant Science, 2018 Meiosis, the type of cell division that halves the chromosome number, shows a considerable degree of diversity among species. Unraveling molecular mechanisms of the meiotic machinery has been mainly based on meiotic mutants, where the effects of a change
Tomás Naranjo
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