- The biodiversity and genetic structure of Balearic sheep breeds. 5 types, pretty well differentiated among themselves, and very different to the mainland breeds.
- Exploration of genetic diversity within Cichorium endivia and Cichorium intybus with focus on the gene pool of industrial chicory. Species reasonably, though not completely, differentiated. C. intybus division into 3 phenotypic cultivar groups (Witloof, root chicory and leaf chicory) confirmed. Leaf chicory division into 3 phenotypic subgroups confirmed (Radicchio, Sugarloaf and Catalogne cultivars). Modern industrial root cultivars have high phenotypic and genetic variability.
- The genome of cultivated sweet potato contains Agrobacterium T-DNAs with expressed genes: An example of a naturally transgenic food crop. No doubt it will soon be banned in Europe.
- Distributions, ex situ conservation priorities, and genetic resource potential of crop wild relatives of sweetpotato [Ipomoea batatas (L.) Lam., I. series Batatas]. 79% of species identified as high priority for further collecting. None of them GMOs. Yucatan is the place to go to get bang for buck.
- Complementary effects of species and genetic diversity on productivity and stability of sown grasslands. Species diversity increased productivity under drought, regardless of number of genotypes per species present. Genotypic diversity increased temporal stability of production under both drought and non-drought conditions, regardless of number of species.
- Exploiting Nutritional Value of Staple Foods in the World’s Semi-Arid Areas: Risks, Benefits, Challenges and Opportunities of Sorghum. Unbalanced amino acid composition, cyanogenic glycosides and antinutrients are obstacles to increased consumption, but can be overcome by: reduction of worrisome components (or their activity), good practices to minimise contamination and compensation by varied diet.
- Nutritional and Health Implications of Conventional Agriculture — A review. Only agricultural biodiversity can save us.
- Pollination services from field-scale agricultural diversification may be context-dependent. Hedgerows may not always be good for both crop pollination and wild bee conservation.
- Morphological, Physiological and Molecular studies on wildly collected Cordyceps militaris from North West Himalayas, India. You can cultivate it.
- Olive biodiversity in Colombia. A molecular study of local germplasm. 5 of the genotypes could not be identified with known varieties.
- A phylogenetic analysis of 34 chloroplast genomes elucidates the relationships between wild and domestic species within the genus Citrus. 3 main clades: citron/Australian species, pummelo/micrantha and papeda/mandarins. Lots of heteroplasy. 4 genes showing positive selection.
Saving the banana. Again
Australian banana farming changed forever last month. That’s because TR4 was detected on two farms in north Queensland, representing probably the greatest ever threat to the A$ 400 million industry.
Tropical race 4 (TR4) is the name given to the fungal strains of Fusarium oxysporum f. sp. cubense (Foc) that cause Fusarium wilt (popularly known as Panama disease) in Cavendish cultivars grown in tropical conditions.
Remember that Cavendish dominates the international banana trade. The spread of TR4 is seriously bad news, as recognized even by FAO.
Following the Australian report, someone asked on the ProMusa mailing list 1 whether the wild species might be a source of resistance. While admitting that he wasn’t fully up to date on developments, and pointing to some very recent literature, 2 Australian expert Dr David Jones had this to say:
As far as I am aware, wild Musa species have not been included in tropical race 4 screening trials except in the Northern Territory of Australia and then it was limited to six accessions of M. acuminata subspecies malaccensis. Of these six accessions, three were resistant and three susceptible. M. a. malaccensis grows wild in areas of Malaysia and Indonesia where it is believed Foc TR4 evolved.
More wild M. acuminata subspecies, other Musa species and pollen-producing, banana cultivars need to be screened as part of the global programme that is being developed to combat TR4. Germplasm with resistance could then be incorporated into conventional breeding projects. Others may have more information on proposed or active screening trials not available to me.
On the local front here in Australia, TR4 has been detected on another farm in North Queensland. The big worry is that it is on the Atherton Tableland in a completely different banana-growing district some 180 km by road from the Tully Valley, the scene of the first outbreak. The prognosis is not as good as it was, but we will have to wait and see what happens next.
Those involved with genetic engineering now have a golden opportunity to push their breeding techniques as the only way to save the global banana industry based on TR4 susceptible cultivars, notably Cavendish, even though no gene ready for insertion is guaranteed to work. If by some lucky chance a banana could be developed that has resistance, I have grave doubts about whether discerning consumers would be willing to eat the fruit. I think the big export fruit companies know this.
It has also often been said by proponents of GM bananas that there is no possibility of genes engineered into GM bananas ‘escaping’ into the environment because commercial cultivars are propagated asexually. I am wondering what would happen if GM bananas were grown in countries with wild bananas present in the adjacent bush, like Malaysia, Indonesia, PNG etc.? Isn’t there a risk that if pollen were released from GM plants it could fertilise nearby wild species?
So anyway, the wild might be a source of resistance, but so also are the Eastern African Highland bananas and plantains, apparently. Some will ask whether the Cavendish is worth saving at all, whether by biotechnological or conventional means, whether using wild or domesticated sources. But that’s another story.
Nibbles: SDGs, Seed book, Magic millets, Medieval diets, Obsessive botanist, Cocoa melting gene, Double sake, Simcock, CIMMYT double, Popular breeder, Georgian wine odyssey, Cinnamon vid, Yam bean factsheet, Jackfruit bandwagon, Prairie berries
- Agriculture and the SDGs in one nice infographic thingy.
- Seeds: The Book.
- Seeds like millets?
- Those medievals really knew how to eat.
- An obsessive botanist? Whatever next.
- Deconstructing chocolate, one gene at a time.
- Sake 101. And for a more in-depth look…
- Joseph Simcox, self-described “Internationally Renowned World Food Plant Resource Authority” takes you “on a World Adventure to learn about little known edible plants!” On Facebook.
- A journey into the heart of CIMMYT. They’ll even screen your maize for you.
- The people’s breeder.
- Tracing wine to its source: Georgia.
- Harvesting cinnamon. With video goodness.
- FAO unleashes its mighty comms machine on another poor neglected crop: yam bean. Not many people hurt.
- Watch out jackfruit, you’re probably next.
- Or maybe saskatoon berries (Amelanchier alnifolia).
Brainfood: Resilience and diversity, Cold tolerant rice, Old baobabs, VIR, Local adaptation, Prunus phylogeny, Bactris mating, Land use change, Wheat landraces, Amazonian agrobiodiversity
- Does Plant Species Richness Guarantee the Resilience of Local Medical Systems? A Perspective from Utilitarian Redundancy. It depends on how knowledge is distributed.
- COLD1 Confers Chilling Tolerance in Rice. From a wild relative.
- Searching for the Oldest Baobab of Madagascar: Radiocarbon Investigation of Large Adansonia rubrostipa Trees. 1,600 years seems to be the record.
- Genetic resources of cultivated plants as the basis for Russia’s food and environmental security. VIR needs Roubles 425 million a year ($14.3 million).
- Using archaeogenomic and computational approaches to unravel the history of local adaptation in crops. Models say that adaptation to higher latitudes was rapid, simple (few genes) and unstable.
- Combining conservative and variable markers to infer the evolutionary history of Prunus subgen. Amygdalus s.l. under domestication. Almonds and peaches were domesticated on either side of the Central Asian Massif from different sections of the genus that had been there for 5 million years.
- Conservation implications of the mating system of the Pampa Hermosa landrace of peach palm analyzed with microsatellite markers. Bactris effective population size in genebanks is too small.
- Global effects of land use on local terrestrial biodiversity. Within-sample total terrestrial species diversity down by 13.6% globally. About the same for crop wild relatives?
- Exploiting genetic diversity from landraces in wheat breeding for adaptation to climate change. It would be a good idea.
- Household Agrobiodiversity Management on Amazonian Dark Earths, Oxisols, and Floodplain Soils on the Lower Madeira River, Brazil. Age of household head, size of household and area of land under cultivation predict amount of agricultural biodiversity managed.
Nibbles: Local earthworm, Public-private, Cassava double, Food prices, Amazonian rubber, Mongolian ag, Pacific roots, Potato CWR, Ugandan plantain, Galician brassicas, Contesting agronomy, Silver bullet
- Lamb ham: an easter tradition we can all get behind.
- Indian researchers market a new earthworm. Not to bring you down or anything.
- PPP are the new black. It says here.
- Cassava gets Big Data treatment. That’s kinda biotechnology too. But then you have to commercialize the stuff, right?
- “Food price shocks are both a determinant and effect of conflict.”
- Recognizing the “rubber soldiers”.
- Chinese experts tell Mongolians how to be more resilient to climate change. I hope it works out for them.
- New potato and sweet potato varieties for the Pacific come to CePaCT.
- Any of those potato varieties benefit from wild relatives?
- New plantain variety for Uganda.
- Galician genebank gets old brassicas. National genebank unavailable for comment. Actually, national genebank unavailable.
- “We can see the blinkered promotion and systematic ‘bigging-up’ of individual agricultural technologies, and their real or imagined impacts, as a direct result of the uncritical acceptance of the language of ‘impact at scale’.”
- Biotechnologist says we need biotechnology to feed world. QED.