- Ex-situ conservation of maize germplasm from different latitudes. You can do it, but not without some genetic changes.
- High density genotyping of the A.E. Watkins Collection of hexaploid landraces identifies a large molecular diversity compared to elite bread wheat. There’s plenty of interesting variation there, as you’d expect.
- Changes in barley (Hordeum vulgare L. subsp. vulgare) genetic diversity and structure in Jordan over a period of 31 years. No significant changes in the amount of genetic diversity in landraces collected in 1981 and in 2012, but later samples more homogenous and less locally distinct.
- Crop wild relatives range shifts and conservation in Europe under climate change. We’ll need genebanks.
- Isotope evidence for agricultural extensification reveals how the world’s first cities were fed. By opening up new land, basically, and never mind the fancy agronomic practices.
- Can the Introduction of Modern Crop Varieties in their Centre of Origin Affect Local Ecological Knowledge? A Case Study of Papaya in the Yucatan Peninsula. Yes, and not in a good way.
- Cryopreserved storage of clonal germplasm in the USDA National Plant Germplasm System. It really is a system.
- A meta-analysis of molecular marker genetic datasets for eastern Africa trees supports the utility of potential natural vegetation maps for planning climate-smart restoration initiatives. But you still have to do the trials.
- Global Diversity and Importance of Mycorrhizal and Nonmycorrhizal Plants. 72% of vascular plants have them.
- Factors associated with agrobiodiversity conservation: A case study on conservation of rice varieties in Barak valley, Assam, India. More connections means more varieties.
- Crop wild relative populations of Beta vulgaris allow direct mapping of agronomically important genes. Genotyping and phenotyping of 189 wild plants along a 10 km transect allows identification of disease resistance gene in the crops.
- Near Eastern Plant Domestication: A History of Thought. The punctuated-centric view is better, according to Occam.
- Fire and plant diversity at the global scale. They’re correlated, or at least associated.
Nibbles: Citrus conservation, Amazon civilizations, Agricultural adaptation, Farming First, Communicating impact, Church forests, Food Forever Initiative
- Conserving citrus in cryo.
- More rethinking of the early civilizations of the Amazon.
- Agriculture led to genetic changes in humans as much as in crops and livestock.
- Farming First goes all in on the SDGs. Oh, yeah, also I won the quiz. Ka-ching!
- Scientists, tell your stories for impact, including on policy.
- The sacred forests of Ethiopia, now there’s a story.
- The biggest story of them all: Food Forever!
Chasing melons in Central Asia
I’ve been meaning to post a link to Eric Hansen’s entertaining “In Search of Ibn Battuta’s Melon” for ages. Published in 2015 in AramcoWorld, its title says it all. Intrigued by a wonderful, and wonderfully expensive, Mirza melon from California, Hansen recalls the following passage from the celebrated Moroccan traveller, and resolves to find the melons in question — “the best of all dried fruit” no less — in their native Uzbekistan.
There are no melons like Khorezmian melons maybe with the exception of Bukharian ones, and the third best are Isfahan melons. Their peels are green, and the flesh is red, of extreme sweetness and firm texture. Surprisingly, they cut melons into slices, dry them in the sun, put them into reed baskets as it is done with Malaga figs, and take them from Khorezm to the remote cities in India and China to sell. They are the best of all dried fruit.
Needless to say, he finds them, or something that he decides is much like them, though he also comes to see the pointlessness of the quest.
In the closing hours of my quest, I realized that over the 681 years since Ibn Battuta’s visit to Khorezm, Uzbek farmers had been hard at work perfecting the art of melon breeding and growing. By saving old local melon seeds, creating and improving new varieties and passing down specialized horticultural practices according to regional water quality, soil types and climatic conditions, they had no doubt improved the disease resistance, shelf life, yield, texture, degree of sweetness and complexity of flavors of melons throughout the different growing areas. And then there was the issue of random variations due to natural hybridization in the melon fields to consider. With all of these factors in mind, it would not be surprising—even likely—that Ibn Battuta’s melon had evolved into something quite different, disappeared entirely, or simply fallen out of favor because other, more recent varieties were better.
Hansen has helpful guides in Uzbekistan, not least the authors of the book Melons of Uzbekistan. He doesn’t however, link to the book, which is available online. I’m happy to rectify that oversight here.
Nibbles: Participatory research, Plant breeding 101, Seed systems webinar, Hot pepper, Heritage Breed Week, Girardinia fibre, Chocolate high, Avocado history, Pollinator heist
- Participate!
- In plant breeding, that is.
- And seed systems too, natch.
- And you too could come up with the world’s hottest pepper.
- Or help save a heritage breed.
- Or sustainably harvest Himalayan nettle.
- But careful not to get high on this chocolate hack.
- Though binging on avocado is perfectly acceptable.
- And for goodness’ sake, watch out for those Russians.
Brainfood: CWR use, Mainstreaming, Duplicates, Phaseolus model, Cherimoya diversity, Legume mixtures, ICRISAT pearl millet, Taste breeding, Rhubarb rhubarb, Plasticity, Seed dispersal
- The Use of Crop Wild Relatives in Maize and Sunflower Breeding. In maize, unlike sunflower, it just hasn’t been worth it. Yet.
- Securing sustainable and nutritious food systems through mainstreaming agricultural biodiversity: an interdisciplinary study. What works in Brazil won’t necessarily fly in India.
- Duplication assessments in Brassica vegetable accessions. Half of 13 accession pairs/triplets with identical names from VIR and NordGen turned out to be morphologically identical.
- Beans (Phaseolus ssp.) as a Model for Understanding Crop Evolution. 7 independent domestication “events” spread across 5 species and 2 continents makes for some interesting natural experiments.
- A Mesoamerican origin of cherimoya (Annona cherimola Mill.). Implications for the conservation of plant genetic resources. Compare and contrast with above.
- Highly productive forage legume stands show no positive biodiversity effect on yield and N2-fixation. Sometimes diversity doesn’t add much.
- Genetic Resources of Pearl Millet: Status and Utilization. 22,888 accessions from 51 countries. Indian landraces: earliness, high tillering, high harvest index and local adaptation; African: bigger panicles, large seed size, and disease resistance.
- Use of natural diversity and biotechnology to increase the quality and nutritional content of tomato and grape. Both are needed.
- Rhubarb (Rheum species): the role of Edinburgh in its cultivation and development. From China, via Russia, with love.
- Will phenotypic plasticity affecting flowering phenology keep pace with climate change? If the change is smaller than about 13 days.
- Seed dispersers help plants to escape global warming. Because they move seed >35 m per decade uphill.