- iSPOT to map common names to Latin names. Jeremy says “Good luck with that.”
- International Conference on Biodiversity Informatics. Jeremy says “Good luck with that too.”
- Online discussion forums for the ICBI, above. Agriculture! Forestry! Fisheries!
- Uganda joins the rush to Svalbard global genebank.
- Scientists to clone pashmina goat. Er … why?
- Adopt-an-Italian-olive-tree.
- International Plant Protection Convention (IPPC) meets so we can eats.
- Inverted root grafting of canistel at the Fairchild Tropical Botanic Garden.
- In vino veritas.
Good news for wheat
Two studies out in the past week in Science are going to help wheat breeders fight diseases. One identified a DNA sequence — for a product known as the Lr34 transporter protein — which seems to confer protection against no fewer than three fungal diseases. And another study showed that a (different) DNA segment (called Yr36), which had previously been introgressed into durum wheat from wild emmer, also conferred rust resistance in the field (via). Gene discovery strikes again.
Nibbles: Indigenous knowledge, Buffalo, Wheat rust, Cassava, New Green Revolution, Environmentalism, Millennium Seedbank, USDA, Pig
- India’s Traditional Knowledge Digital Library a bulwark against piracy. Ahoy me mateys!
- Oh give me a home, where the buffalo-cow hybrid roamed.
- “We’ve found one of the most important disease resistance genes in wheat.”
- Cassava on its way to being a complete meal. Oh joy.
- Usual suspects debate GM.
- The history of the American wilderness movement deconstructed.
- Australia’s Northern Territory needs more collectors.
- “USDA People’s Garden announced today will eliminate 1,250 square feet of unnecessary paved surface at the USDA headquarters and return the landscape to grass.” Michelle likes it.
- Pig domestication, for Vavilov and now.
Nibbles: Hell, Honours, Pollution, Darwin, Genomes, Small companies, Tigernuts, Urine soft drink, Medicinal plants
- A way out of hell: workshop on Database Challenges in Biodiversity Informatics
- Potato man honoured.
- Farm diversity reduces nitrogen runoff.
- Darwin on the Farm, from our friends at the Global Crop Diversity Trust.
- Yeast and wheat genome sequencing going gangbusters.
- Coffee!
- Fermented tigernuts more nutritious? No, they’re not from an endangered species. Via.
- Cow water!
- Lots of medicinal plants conservation projects going on in India.
Maize aguafiestas
From Jacob van Etten.
Uncorking a big bottle of agrobiodiversity, that is what Mexico’s first farmers did when they domesticated maize. Not only is maize enormously malleable, genetic diversity also goes everywhere through cross-pollination. That is in traditional farming systems. Modern maize improvement has been about sorting out this abundance by “freezing” it into breeding lines, to get some control over the diversity feast. But what happens when the hybrids are released into the dance room again?
An Italian study just out quantifies the gene flow from hybrids to traditional varieties. It finds different degrees of purity in the traditional varieties, but no genetic erosion. This is an interesting finding in the light of writings about “creolisation” in Mesoamerican agriculture. Creolisation, the mixing of modern and traditional varieties, is thought to lead to plants that combine their benefits. I have always wondered if the creolised varieties of Mesoamerica are not modern varieties “creolised” by selection instead of mixing with traditional varieties. Something similar to the Italian study would be needed to find this out.
The question is only one step removed from the issue of gene flow from transgenic crops to traditional varieties. Perhaps you remember the Quist and Chapela paper published in Nature in 2001 on the presence of transgenes in Mexican traditional maize, and the controversy it generated. A new study confirms the presence of transgenes in Mexico with an improved study design. Through genetic population simulations it also explains why detection of transgenes is erratic and prone to giving false negatives. The distribution of the transgenes is likely to be very skewed. A few fields will have much of them, but most will have very few. This has to be taken into account and therefore authors call for more rigorous sampling methods to detect transgene presence.
There is little discussion or speculation about the effects of transgenes on maize diversity. Will the transgenes just add to the existing diversity, like the hybrids in Italy? Will they perhaps produce some benefits, like the creolized varieties? Or will, in some Monty Python-like scenario, the big seed companies pick up the message about rigorous sampling and start to trace transgenes in Mexico in order to charge farmers for unlicensed use of their technology?