- Crop Genebank’s Knowledge Base enjoys an outing in Amman.
- Great Headlines of our Time: Researchers fight world hunger by mapping the soybean genome.
- Blight-resistant potatoes from Hungary to the UK.
- Danish Seed Savers 2010 list available.
- “We want to make sorghum to be even better than maize,” says Kenyan gene jockey. Why?
- “The dog is the brassica of the vertebrate world.” Jeremy says: “Never met one I didn’t like … cooked right.”
- James sprouts off on brassicas too.
- New UK approach to food security: apples.
Cracking the code of dog diversity
Another contribution from Michael Kubisch.
Ever wondered why your rat terrier looks so different from your neighbor’s mastiff? Well, eons of selective breeding, of course, which have resulted in genetic differences between these two and other dog breeds. Man’s best friend was undoubtedly among the very first animals to be domesticated, although the huge variety of breeds found today is probably a much more recent phenomenon. Which part of the dog genome, or more pertinently which genes, were involved in generating this diversity remains largely a mystery — but one that many geneticists would like to solve.
A first glimpse has now been provided by a group of scientists who compared genomic data from dogs belonging to ten different breeds using what is called single-nucleotide polymorphisms or SNPs for short. SNPS are very helpful because the presence of a particular SNP sometimes is indicative of the presence of a specific allele at a nearby gene. Similarly, if there are SNPs that differ between two dog breeds it is possible that nearby genes may be different as well and that those genes may have played a role in what sets these breeds apart.
The study revealed 150 areas of the dog genome containing more than 1000 candidate genes that appeared highly variable between those breeds that were examined. Not surprisingly perhaps, several of these genes are known to determine things like coat color, size, skeletal morphology and behavior. However, interestingly, several candidates included genes that are known to act as regulators of other genes, suggesting that some evolutionary changes are not the result of variant alleles of genes but changes in how these genes are controlled. More interesting insights are sure to follow.
Nibbles: Globalizing locavorism, Pollinator relations, Fisheries, Pea wild relative, Haitian coffee, Niche modeling, Slow Food, Chayote, Grass vs corn, Shade chocolate, American organic
- “…eleven models of regional food aggregation and distribution that are successful in linking local farmers with regional food chains.” Via.
- Hell hath no fury like a fig tree scorned.
- Tracking monkfish, saving monkfish.
- The history of the wild relative of the pea.
- Can coffee help rebuild Haiti?
- “Integrating bioclimate with population models to improve forecasts of species extinctions under climate change.”
- “The commoditization of products and taste: Slow Food and the conservation of agrobiodiversity.”
- CIAT promotes chayote in Vietnam. Why? Well, it’s not about the crop or the country. I suppose it’s about farmers and markets. But is there a diversity angle?
- How old is feeding corn (maize) to cows? Older than some people think, apparently.
- Shade-grown cacao sows seeds of its own demise.
- Waiting for the results of the USDA organic survey…
Nibbles: City fish, Phylogenetics course, Andy got a brand new blog, Leather value-adding, Cod, Monastery gardens, Microbial collections, Cassava, Animal genebank, Biofuel
- Learn urban aquaculture.
- Learn phylogenetics online.
- Learn about the CGIAR’s manifesto for agriculture and climate change from Andy’s new blog.
- Learn about the importance of hide processing in East Africa.
- Learn about the latest blow to British cooking.
- Learn about monastic gardening.
- Learn about the USDA’s microbial collections. They’re agrobiodiversity too.
- Learn what is the latest crop to get its genome sequenced.
- Learn about a private livestock genebank in the US.
- Learn about the effect of biofuel crop diversity on insect diversity.
Keeping up to date with taxonomy made easier
Yesterday I was invited to submit one of my photos to the Flickr pool on Systematic Botany. Yes, I know. The media ought to be alerted. But I point this out less to draw attention to my photographic prowess than to highlight the fact that there is in fact a Flickr pool on Systematic Botany, and that it is a lot of fun. Exploring the discussion forum led me to an old news item about staff at the National Museum Cardiff and Kew naming a whole bunch of new Sorbus species, and not from some isolated corner of the world either, but England and Wales.
Some of these trees have probably developed recently and are examples of on-going evolution of new species. Others are older types which have been known for some time but are only now described as ‘species’ thanks to modern DNA methods.
Some Sorbus species have economic uses, and the taxonomy is made horrendously complicated by rampant hybridization and apomixis.
Coincidentally, IIALD had a piece on a new scheme “supporting and promoting the development of persistent and openly accessible digital taxonomic literature.” I wonder whether making photographs of plants available through Flickr or some other image sharing site might contribute to this worthy cause.