Category: Wild relatives

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Mashing up 3d trees and crop wild relatives

I’ve been exploring Google’s 3d trees thing a bit, to work out just how cool it is. I said in my previous post on this that it could eventually be used to document and virtually explore field genebanks (of coconuts, say, or breadfruit). But of course you can explore a few forests around the world right now, so I wondered if any crop wild relatives have been collected in any of these places.

The answer is, alas, no, at least for Surui Forest in Brazil, one of the couple of “wild” places for which Google currently has 3d trees (the others are urban areas). At left you can see the distribution of accessions of crop wild relatives in Brazil, according to Genesys. Unfortunately, none fall within the area for which Google has 3d data.

I did get a hit in GBIF for a cultivated cassava just outside the forest. But that’s not quite the same, I agree. Oh well, maybe we’ll soon have more data. 1

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Nibbles: Disease, Tobacco, CGIAR, Food Security, Nutrition, Soil, Popcorn, Quinoa, Aegilops

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Earth Engine and crop wild relatives

The other recent Google Earth innovation is Earth Engine, where you can check out a bunch of interesting visualizations of environmental data. Spurred by something Julian said, I downloaded the MODIS VCF global tree cover change dataset (2000-2005). And then I went to Genesys and downloaded data on wild beans (Phaseolus spp). It was not very difficult to put the two together in Google Earth. In the map below, which just looks at central Mexico, orange means high deforestation, and green afforestation. Is it me, or do germplasm accession seem to be concentrated in areas of high deforestation? Anyway, with a little work, this could be a cheap and cheerful way to identify particularly threatened areas for germplasm collecting.

mexico

Who wants to be the first to put crop wild relatives data in Earth Engine?

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A brave new world for crop wild relatives

Thanks to Dr Brian Ford-Lloyd of the University of Birminghan in the UK for the following contribution.

A ground breaking publication in Nature Genetics points to the future for the genetic evaluation of crop wild relative germplasm. A group of Chinese scientists have used Illumina Next Generation Resequencing to produce whole genome sequences of 17 wild species of soybean. Only 17 wild species? But this is just the start for evaluating crop wild relatives on a completely different level than before — adding a different perspective to the analysis of genetic diversity, the identification of important adaptive differences between species, and locating novel allelic variation that can be used in crop improvement. One important result from the work is that they uncovered genetic variation in the wild species that has been clearly lost in cultivated material.