- Ex Situ Conservation of Potato [Solanum Section Petota (Solanaceae)] Genetic Resources in Genebanks. The only review of the subject you’ll need. Until the next one.
- Editorial Essay: An update on progress towards Aichi Biodiversity Target 11. Not bad, but the difficult stuff remains difficult. One of several interesting papers.
- The History of Farm Foxes Undermines the Animal Domestication Syndrome. Those Russian foxes were already pretty tame. Here’s a Twitter tread from one of the authors that lays it all out.
- Developing fruit tree portfolios that link agriculture more effectively with nutrition and health: a new approach for providing year-round micronutrients to smallholder farmers. 11 species can address micronutrient gaps.
- Plant Polyploidy: Origin, Evolution, and Its Influence on Crop Domestication. Extreme events and disasters drive polyploidy, which drives diversification at various levels, which facilitates domestication.
- Spectral Reflectance Indices and Physiological Parameters in Quinoa under Contrasting Irrigation Regimes. Phenotyping for drought tolerance from space.
- Asian Crop Dispersal in Africa and Late Holocene Human Adaptation to Tropical Environments. Via NE Africa always something new.
- Invited review: Intergovernmental Panel on Climate Change, agriculture, and food — A case of shifting cultivation and history. The IPCC could have done a better job of synthesizing the data on the impact of climate change on crops and livestock.
- Seed comparative genomics in three coffee species identify desiccation tolerance mechanisms in intermediate seeds. Whole bunch of genes involved.
- Capturing genetic diversity – an assessment of the nation’s gene bank in securing Duroc pigs. Genebank doing a pretty good job in this case.
- Genetic diversity of oolong tea (Camellia sinensis) germplasms based on the nanofluidic array of single-nucleotide polymorphism (SNP) markers. It’s not all the same.
- Tapping Pennisetum violaceum, a wild relative of pearl millet (Pennisetum glaucum), for resistance to blast (caused by Magnaporthe grisea) and rust (caused by Puccinia substriata var. indica). Out of 305 accessions, one was resistant to both diseases. IP21711 if you must know. A few more were resistant to one or the other disease.
- Can Diets Be Healthy, Sustainable, and Equitable? No, and they’ll be difficult to change, but the “burden of change should not be solely placed on the consumer’s ability to make healthy choices.”
Nibbles: Ottoman food, Georgian cheese, Livestock data, Welsh oats, Spices, Global apples, Cape gooseberry, In vitro
- From börek to burricche.
- The mother of Georgian cheese. I’m sure they have their version of börek there too. If not, there’s always bread.
- Fancy StoryMap of global livestock production. No wonder there’s lots of cheese in Georgia.
- Bringing back rare Welsh oats. Well, someone has to…
- A short history of cinnamon. Does it go with börek?
- Beautiful apples. And some so ugly they are beautiful.
- Crowd-sourcing Physalis improvement. Very tempting.
- How to conserve in vitro and in cryo. Useful for the three things above, for example.
Visualizing broccoli
Zachary Stansell, who seems like a very interesting guy, had the top post on all of Reddit late last year with — wait for it — a picture of broccoli diversity. And rightly so. It is beautiful.
The coloured bars? They are based on ~10K SNPs, with varieties that share a given colour sharing more of these markers, and being more closely related genetically.
Nibbles: USDA maize genebank, Apple breeding, Seed conservation, Soil map, Scoring supermarkets, DNA barcoding, Stone Age Hypoxis, Hybrid wine, Lost crops, Boswellia, Leucokaso, Species mixtures
- Nice student video on the genebank and breeding programmes at Iowa State.
- Speaking of breeding programmes and videos, here’s Sean Myles on his work on apples in Canada.
- Seed conservation legend Richard Ellis on what climate change is doing to seed quality.
- An amazing new global soil properties map is open for business.
- Scoring supermarkets for the human suffering they represent.
- The future of DNA barcoding…is here.
- Cotton 101.
- Strong evidence of Middle Stone Age tuber cooking in southern Africa.
- French wine growers dip a cautious toe into the grapewine interspecific genepool.
- Yields of mixtures of now “lost” native American crops comparable to those of maize.
- The canonical yearly frankincense story in honour of Epiphany.
- Biblical white olive makes a comeback in Italy.
- Useful update of mixture studies.
Tomato diversity did what?
I hope Jeremy won’t mind me copying here his take on tomato diversity from the last Eat This Newsletter of 2019. There’s interesting stuff there on coffee and wheat too, so wander over, and subscribe.
It is a truth universally acknowledged, that the modern crop is genetically less diverse than its predecessors. Universally acknowledged perhaps, but in at least one case, not a truth.
Dutch greenhouse tomatoes have been a poster-child for the loss of genetic diversity, the result of breeding for bumper production and good looks, rather than flavour or resilience. In the late 1980s, especially, German newspapers described them as Wasserbomben. Exports of these water bombs to Germany, previously their main destination, collapsed, and Dutch breeders began to pay attention. Their efforts are recognised in a new analysis of seven decades worth of tomato varieties, with a large jump in genetic diversity from the 1990s to the 2000s. An earlier jump, from the 1960s to the 1970s, reflects an effort to breed better disease resistance into existing varieties.
These genetic changes have been accompanied by changes much easier to recognise in the supermarket and on the plate. In the 1950s and 1960s, you would be hard pressed to buy a tomato that weighed less than 50 gm or more than 100 gm. Modern cherry tomatoes and big beefsteak types are newcomers to industrial greenhouses. Flavour profiles too, have changed, with tomatoes becoming both more flavourful and more diverse in their flavour profiles.
Of course, it is still possible to buy a water bomb if you try, but the key conclusion of this study is that tomato genetic diversity has seen “a nine-fold increase since the 1960s”. That’s not to say that things couldn’t be better. Other studies have shown that people generally consider heirloom tomatoes – pre-1950 and not subjected to focussed industrial-style breeding – tastier than modern varieties. Good though recent Dutch breeders have been, they could yet do better.