Results 21 to 30 of about 110,044 (258)

Control of meiotic crossing over in plant breeding

open access: yesВавиловский журнал генетики и селекции, 2023
Meiotic crossing over is the main mechanism for constructing a new allelic composition of individual chromosomes and is necessary for the proper distribution of homologous chromosomes between gametes.
S. R. Strelnikova, R. A. Komakhin
doaj   +1 more source

Effect of Cross Over Operator in Genetic Algorithms on Anticipatory Scheduling [PDF]

open access: yesProceedings of the International Symposium on Automation and Robotics in Construction (IAARC), 2007
Disk schedulers in current operating systems schedule a request as soon as the previous request has been completed. In many common applications disk read requests are issued synchronously with short period between them In this case, the scheduler switches to a request from another process with the assumption that the last process has no more requests ...
R. Muthu Selvi, R. Rajaram
openaire   +1 more source

Culex pipiens crossing type diversity is governed by an amplified and polymorphic operon of Wolbachia

open access: yesNature Communications, 2018
Wolbachia causes cytoplasmic incompatibility (CI) between mosquitoes infected with different strains, but the genetic basis of observed CI diversity is unknown. Here, Bonneau et al.
Manon Bonneau   +6 more
doaj   +1 more source

The unsung hero of science: Barbara McClintock, who won the Nobel Prize in Physiology or Medicine in 1983 for her discovery of mobile genetic elements [PDF]

open access: yesThe Ukrainian Biochemical Journal
In 1983, American plant biologist and cytogeneticist McClintock, one of the great loners of modern­ scien­ce, received the first woman scientist’s unshared Nobel Prize in Physiology or Medicine. Barbara McClintock’s research, conducted in the 1930s, long
O. P. Matyshevska   +2 more
doaj   +1 more source

Genetic Programming Crossover: Does It Cross over? [PDF]

open access: yes, 2009
One justification for the use of crossover operators in Genetic Programming is that the crossover of program syntax gives rise to the crossover of information at the semantic level. In particular, a fitness-increasing crossover is presumed to act by combining fitness-contributing components of both parents.
openaire   +1 more source

UNEQUAL CROSSING OVER AT THE rRNA TANDON AS A SOURCE OF QUANTITATIVE GENETIC VARIATION IN DROSOPHILA [PDF]

open access: yesGenetics, 1980
ABSTRACT Abdominal bristle selection lines (three high and three low) and controls were founded from a marked homozygous line to measure the contribution of sex-linked "mutations" to selection response. Two of the low lines exhibited a period of rapid response to selection in females, but not in males. There were corresponding changes in
R, Frankham, D A, Briscoe, R K, Nurthen
openaire   +2 more sources

Genetic Gain Trend in Yield and Advanced Selection of Yayo Coffee (Coffea arabica L.) Land Race Collection

open access: yesAdvances in Agriculture, 2022
Coffea arabica L., the dominant cash crop in the world market, is native to rain forest of Ethiopia where it is believed to exist with high genetic diversity. Estimating genetic parameters are momentous in deciding breeding method to be followed for crop
Dawit Merga   +9 more
doaj   +1 more source

A cytological demonstration of "genetic" crossing-over [PDF]

open access: yesProceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character, 1930
Abstract A stage in meiosis where the paired chromosomes form loops, coming together at points distributed at random along their length, was first described by Rückert (1892) in Pristiurus. These points we now recognise in suitable material as exchanges of partner amongst the four pairing half-chromosomes. But although Rückert did not
openaire   +1 more source

Homoeologous Chromosomes From Two Hordeum Species Can Recognize and Associate During Meiosis in Wheat in the Presence of the Ph1 Locus

open access: yesFrontiers in Plant Science, 2018
Understanding the system of a basic eukaryotic cellular mechanism like meiosis is of fundamental importance in plant biology. Moreover, it is also of great strategic interest in plant breeding since unzipping the mechanism of chromosome specificity ...
María C. Calderón   +3 more
doaj   +1 more source

A Simplified Strategy for Introducing Genetic Variants into Drosophila Compound Autosome Stocks

open access: yesG3: Genes, Genomes, Genetics, 2016
Drosophila stocks bearing compound chromosomes, single molecules of DNA that carry the genomic complement of two chromosomes, are useful tools for studying meiosis and mitosis.
William D. Gilliland   +3 more
doaj   +1 more source

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