- Maximizing genetic differentiation in core collections by PCA-based clustering of molecular marker data. It works. In simulations, to be fair.
- Study of rare traditional pork breeds concerning the aspect of biodiversity conservation. Mangalitsa is what you want, apparently.
- Open Variety Rights: Rethinking the Commodification of Plants. A “protected commons”? Sounds a bit like the ITPGRFA to me.
- Natural and cultural heritage in mountain landscapes: towards an integrated valuation. Yeah, but does your cultural heritage include things like agricultural biodiversity?
- Fortifying plants with the essential amino acids lysine and methionine to improve nutritional quality. Conventional breeding hasn’t worked. But has it been for want of trying? Just askin’.
- Genetic and phenotypic diversity in a germplasm working collection of cultivated tropical yams (Dioscorea spp.). Relationships among species, synonyms, duplicates, yada yada.
- Roman food refuse: urban archaeobotany in Pompeii, Regio VI, Insula 1. Romans ate a Mediterranean diet. Still no cure for cancer.
- Genetic bases of rice grain shape: so many genes, so little known. Why bother? Just askin’.
Man-tall wheats
Via CIMMYT’s Flickr page:
Bibiana Espinosa of the germplasm bank is one of two runners up this week in our photo competition for CIMMYT staff and friends, with this image showing very tall wheat being regenerated at Mexicali. Although keeping seeds at low temperatures extends their lives, the bank must sow and reharvest all of its thousands of incredibly diverse samples periodically to make sure the seeds remain viable. Says Bibiana: “It was amazing to see wheat plants taller than Tom Payne!”
Photo credit: B. Espinosa/CIMMYT.
Chicken salad
Ultimately, researchers hope to get ancient DNA from well-dated bones. But “replicable DNA has been as rare as hen’s teeth,” Zeder says, thanks to contamination issues and tropical climes that degrade DNA. One team recently claimed to have mtDNA from an ancient Polynesian chicken bone in Chile — a dramatic find that would prove Polynesians reached the Americas before Columbus — but the find has been questioned as possibly contaminated (Science, 11 June 2010, p. 1344). Techniques are improving, however…
That cliff-hanger is a quote from a rather attractive Science spread enticingly entitled “In Search of the Wild Chicken,” reproduced a few days ago in an ILRI blog post. It’s a great story, but one wonders why there was not at least a mention of the recent paper in PLOSOne “Investigating the Global Dispersal of Chickens in Prehistory Using Ancient Mitochondrial DNA Signatures.” Those authors, after all, had 92 — count them!! — archaeological chicken bones to play with, and spun a convincing tale of “multiple prehistoric dispersals from a single Asian centre” from their analysis. Is there something of a rivalry developing in the highly competitive world of chicken DNA? Probably not, and no doubt we’ll be getting lots of cease and desist notices from the denizens of said world for even suggesting such a thing.
Nibbles: Desert afforestation, Breadfruit, Sustainable tea, Biofortification, Cassava breeding, Wheat breeding, Ancient microbrewery
- The Sahara Forest Project: what could possibly go wrong?
- Maybe they should try breadfruit. Or avocados. Or ask this guy for advice.
- Not for all the sustainable tea in China!
- Or all the high-Fe pearl millet in India.
- Or all the wild chickens in South Asia.
- Cassava gets the genomic selection treatment. Maybe wheat too?
- Did someone mention beer?
Brainfood: Bumper bonanza, Old peas, Irrigated meadows, Cereal mashes, Medicinal plants, Diversity and production, Millet gaps, Seed ageing, Flax core
- First off — a pretty big deal. Taylor & Francis have made a bunch of papers related to sustainable agriculture freely available, but only until the end of December. Happy whatever holiday won’t offend you.
- Twentieth-century changes in the genetic composition of Swedish field pea metapopulations. Metapopulations have become isolated populations. In genebanks.
- Effects of different irrigation systems on the biodiversity of species-rich hay meadows. Change from the traditional irrigation system has affected biodiversity levels, but not a huge amount.
- Research regarding the use of wheat biodiversity for obtaining some cereal-based fermented mashes. Let’s go straight to what we need to know here: the best mash come from spelt wheat. Oh, to be the one doing the organoleptic characterization.
- Cultivation and high capitalization of medicinal and aromatic plants in the Romanian-Bulgarian cross-border region. If you’re really interested, there’s a database that brings it all together.
- Crop biodiversity, productivity and production risk: Panel data micro-evidence from Ethiopia. More crops = more production. But the devil is in the details, I suspect.
- Identification of gaps in pearl millet germplasm from East and Southern Africa conserved at the ICRISAT genebank. We used to do this sort of thing by hand in my day.
- At3g08030 transcript: a molecular marker of seed ageing. This mRNA could predict germination performance of a dry seed lot across species. Good for genebanks?
- Assembling a core collection from the flax world collection maintained by Plant Gene Resources of Canada. You don’t hear much about core collections these days, why is that?