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Latest Polyploidy Stories

2012-07-31 23:01:40

The Agriculture and Anatomy Sciences are two new key biology branches covered by the Sciences Social Network ScienceIndex.com. The users of the website monitor 352 scientific journals publishing in these two branches and submit the most recent and significant articles for inclusion in ScienceIndex.com. While the site currently contains a total of 1,662,184 posts, it features 51,867 articles in these two sections. ScienceIndex.com was established in 1998 to index the very latest news,...

Rare Glimpse Shows Origin Of Species
2012-07-10 14:06:33

Plant overcomes infertility to give rise to a new species in Scotland A new species of monkey flower, created by the union of two foreign plant species, has been discovered on the bank of a stream in Scotland. Genetic changes in this attractive yellow-flowered hybrid have allowed it to overcome infertility and made it a rare example of a brand new species that has originated in the wild in the last 150 years. Thousands of wild species and some crops are thought to have originated in this...

Does Polyploidy Play A Role In The Italian Endemic Flora?
2012-05-22 08:24:01

Besides the obvious differences between plants and animals, subtle ones lie concealed within the cell, even within the nucleus. In both plant and animal cells, the nucleus contains DNA, which condenses into chromosomes during cell division. Chromosomes can be counted at that stage, revealing the chromosome number for each species. Here comes a difference: while the chromosome number spans a relatively short range across animal species (2-296: 46 in man), some plant species have over 1000...

Scientists Gain Insights From Miscanthus Genome Maps
2012-05-16 08:07:00

Two reports were released this year on the genome of Miscanthus grasses, which are used in gardens, burned for energy and converted into liquid fuels. The first, led by the energy crop organization Ceres, appeared in the journal PLoS ONE; the second, from a team led by researchers at the University of Illinois, is in the journal BMC Genomics. The data, materials, methods and genetic markers used in the latter study are available to the public for further research. Scientists knew that...

Image 1 - Chromosome Analyses Of Prickly Pear Cacti Reveal Southern Glacial Refugia
2012-02-15 04:21:46

Analysis of chromosome number variation among species of a North American group of prickly pear cacti (nopales) showed that the most widespread species encountered are of hybrid origin. Those widespread species likely originated from hybridization among closely related parental species from western and southeastern North America. This study was published in the open access journal Comparative Cytogenetics. The prickly pear cacti (of the genus Opuntia) are endemic to the Americas. The genus...

2012-01-19 17:52:01

A new University of Florida study shows a hybrid plant species may experience rapid genome evolution in predictable patterns, meaning evolution repeats itself in populations of independent origin. Researchers analyzed genes of a naturally occurring hybrid species, Tragopogon miscellus, and the study, published online today in Current Biology, suggests genome evolution in hybrid plants may follow a set of “rules” that determine which parental genes are lost. The research may be...

2012-01-06 16:01:24

A new University of Florida study shows genomes of a recently formed plant species to be highly unstable, a phenomenon that may have far-reaching evolutionary consequences. Published online this week in the Proceedings of the National Academy of Sciences, the study is the first to document chromosomal variation in natural populations of a recently formed plant species following whole genome doubling, or polyploidy. Because many agricultural crops are young polyploids, the data may be used...

Frogs Use Calls To Find Mates With Matching Chromosomes
2011-12-28 04:54:03

Tree frogs that look similar hear chromosome difference in calls; offers new insight to frog evolution When it comes to love songs, female tree frogs are pretty picky. According to a new study from the University of Missouri, certain female tree frogs may be remarkably attuned to the songs of mates who share the same number of chromosomes as they do. The discovery offers insight into how new frog species may have evolved. Carl Gerhardt, Curators Professor of Biological Sciences in the...

2011-11-01 20:35:00

An international team of scientists, including biologists from the University of North Carolina at Chapel Hill, may have pinpointed for the first time the mechanism responsible for cell polyploidy, a state in which cells contain more than 2 paired sets of chromosomes. When it comes to human chromosomes and the genes they carry, our tissue cells prefer matched pairs. Bundled within the nucleus of our cells are 46 chromosomes, one set of 23 inherited from each of our parents. Thus, we are...

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2011-08-01 11:05:46

Scientists on the Norwich Research Park, working with colleagues in China, have developed new techniques that will aid the application of genomics to breeding the improved varieties of crop needed to ensure food security in the future. By dissecting the complicated genome of oilseed rape they have been able to produce maps of the genome that are needed for predictive breeding. Traditional breeding involves crossing two varieties and selecting the best performing among the progeny. Predictive...


Word of the Day
bibliopole
  • A bookseller; now, especially, a dealer in rare and curious books.
This word comes from a Greek phrase meaning 'book seller.'
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