- Assessment of genetic relationships between cultivated arracacha (Arracacia xanthorrhiza Bancr.) and its wild close relatives in the area of domestication using microsatellite markers. Lots more variation in the wild, natch.
- Exploring Relationships between Biodiversity and Dietary Diversity in the Mediterranean Region: Preliminary Insights from a Literature Review. There has been an increase in dietary diversity, but of the wrong sort of diversity.
- Special issue Of Small Ruminant Research on “Genetic diversity of small ruminants in Asia”. From the Punjab Urial sheep to the goats of Myanmar.
- Genetic diversity of flax accessions originating in the Alpine region: a case study for an ex situ germplasm evaluation based on molecular marker. Past genebank conservation hasn’t been perfect.
- Enhancing genetic gain in the era of molecular breeding. It all starts with genetic variance. Hello, genebanks!
- Crops In Silico: Generating Virtual Crops Using an Integrative and Multi-scale Modeling Platform. Factor in gene editing and goodbye genebanks.
- Unconscious selection drove seed enlargement in vegetable crops. And not only vegetables, cereals too. But remember African rice?
- Palm economic and traditional uses, evolutionary history and the IUCN Red List. Globally, the more threatened palms are the less used.
- Impact of Climate Change, Weather Extremes, and Price Risk on Global Food Supply. The effect is not just on production, but also price.
- Identifying the landscape drivers of agricultural insecticide use leveraging evidence from 100,000 fields. In Kern County, California, crop diversity decreases insecticide us. But…
Italian olives still in trouble
In case you were wondering, the latest on the “olive plague” (Xylella fastidiosa) is that it’s spreading through the so-called containment areas. Oh joy.
It’s apparently all the fault of the “authorities,” according to a new audit of the control efforts, reported in Nature.
The commission’s audit, published on 31 May, includes a litany of failures by Italian authorities. It says that systematic monitoring of the infection began too late, and that there were ‘excessive delays’ in uprooting some infected trees. And the report charges that national and regional authorities have disbursed little more than half of the €10 million (US$11.2 million) budgeted for containment measures. Data obtained by Nature add further evidence of a slow response. In most of 2016, Italian laboratories processed almost no Xylella samples — indicating that monitoring had almost ceased (see ‘Lab drought’). Authorities did not respond to requests for comment.
But fear not…
There is some good news. Scientists in Puglia have identified two varieties of olive tree that are relatively resistant to the disease. Last month, the commission proposed that these could be planted in infected areas, to replace dead trees. But work to develop fully resistant trees could take a decade or more, says Martelli.
What a time to be alive.
Some new germplasm databases, at least to me
Long-time readers may remember a post from 2012 summarizing some media reports of trouble at the Italian national genebank at the National Research Council (CNR), Bari. But maybe things are not as bad as were made out at the time. Or have got better.
I’ve just come across what seems to be a fairly new website for the genebank and it doesn’t give the impression of crisis. It lists 57,568 accessions from 184 genera and 834 species, which is more that was reported back in 1999 in WIEWS for ITA004, hopefully the correct code for the genebank in question (at least the address matches, if not the name of the institute). This is the geographic coverage of the collection:
Impressive. Unfortunately, data on these accessions are not available in the European genebank database, Eurisco, and therefore they’re not in the global portal, Genesys, either. Hopefully that’s being rectified.
Since I’m on the subject of germplasm databases, I’ve also recently come across the Legume Information System, which focuses on material in the US genebanks. It has all kinds of data, but I just looked for germplasm from Italy to compare with what’s in Bari. Here’s the map for Medicago spp, showing growth habit in different colours (click on it to see it better).
Compare and contrast with the ITA004 collection for the same species.
Which is why it’s a good idea to have all these data together in one place, i.e. Genesys.
Getting to grips with rice in Europe
A little more on that RiceAtlas that I blogged about a couple of days ago. I managed to download the shapefile of rice growing areas, and open it in Google Earth. I then imported the Genesys rice dataset, and zoomed in on Europe. Here’s what those two things together look like.
Definitely a few issues. I’m not too worried about the accessions in northern Europe. Those are probably just wrong passport data. But what about all those in Turkey which are also outside putative rice growing areas? Are those passport data mistakes too, or is RiceAtlas missing something?
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.