- Multiple origins and a narrow genepool characterise the African tea germplasm: concordant patterns revealed by nuclear and plastid DNA markers. It’s a “potpourri,” but kinda missing Chinese Assam stuff.
- The eastern part of the Fertile Crescent concealed an unexpected route of olive (Olea europaea L.) differentiation. It was in Iran before domestication.
- Identifiers for the 21st century: How to design, provision, and reuse persistent identifiers to maximize utility and impact of life science data. Why DOIs succeeded, and why something like them needs to be applied to biological specimens, including genebank accessions, to combat “desultory citation practices”. But we knew that.
- Speed breeding: a powerful tool to accelerate crop research and breeding. Can double the number of generations per unit time with fully-enclosed controlled-environment growth chambers.
- Evidence for two domestication events of hyacinth bean (Lablab purpureus (L.) Sweet): a comparative analysis of population genetic data. With the 2-seeded group domesticated in Ethiopia, the 4-seeded somewhere else in Africa.
- Refinement of the collection of wild peas (Pisum L.) and search for the area of pea domestication with a deletion in the plastidic psbA-trnH spacer. Maybe not Turkey.
- The effectiveness of celebrities in conservation marketing. Use carefully, and evaluate.
- Cannabis in Eurasia: origin of human use and Bronze Age trans-continental connections. Proto-Indo-Europeans were real stoners.
- Analysis of Three Sugarcane Homo/Homeologous Regions Suggests Independent Polyploidization Events of Saccharum officinarum and Saccharum spontaneum. It’s really complicated, not least because of plant breeders.
- Genomic Comparison of Indigenous African and Northern European Chickens Reveals Putative Mechanisms of Stress Tolerance Related to Environmental Selection Pressure. African chickens able to withstand high temperatures due to a region on chromosome 27 and European chickens low temperatures due to region on chromosome 2.
Brainfood: Taste breeding, Cat domestication, ITPGRFA in USA, CWR extravaganza, Ecology & ag, Brassica identification, Biodiversity monitoring, Languages, Species recovery, Benin pigeonpea
- Sensory sacrifices when we mass-produce mass produce. You need consumer-assisted selection.
- The palaeogenetics of cat dispersal in the ancient world. Two Middle-Eastern sub-populations of one sub-species contributed to domestication, at different times, and the result spread first with agriculture and then aboard ships. But we haven’t changed them in the same way we’ve changed dogs etc. You don’t say.
- U.S. ratification of Plant Treaty: benefit sharing ambiguity for plant genomics researchers does not change. But what about genomics data?
- Wading Into the Gene Pool: Progress and Constraints Using Wild Species. Introduction to the Special Section on CWR.
- Plant ecological solutions to global food security. Introduction to the Special Feature on Ecological Solutions to Global Food Security. The intersection with the above is probably here.
- A multiplex PCR for rapid identification of Brassica species in the triangle of U. Now there’s no excuse.
- Connecting Earth observation to high-throughput biodiversity data. I don’t see any reason why the same thinking couldn’t be applied to crop diversity.
- Linguistic diversity of natural UNESCO world heritage sites: bridging the gap between nature and culture. 80% of Natural WHSs intersect at least one indigenous language.
- Overcoming barriers to active interventions for genetic diversity. Embrace the hybrid by focusing on process, not form.
- Utilization and farmers’ knowledge on pigeonpea diversity in Benin, West Africa. For some reason, farmers don’t like coloured seeds.
Using crop wild relatives in situ for improving sugar beet
Thanks to Brian Ford-Lloyd, Emeritus Professor of Plant Conservation Genetics at the School of Biosciences, University of Birmingham, for this contribution, hopefully the first of many.
Aside from beet cyst nematode, rhizomania is the most important disease of sugar beet worldwide, having plagued growers since the early 1950s. It can only be combated by growing resistant varieties, and there are two known major genes conferring resistance, one having been discovered by conventional means in the sugar beet crop, and the other in wild sea beet (Beta vulgaris ssp. maritima) populations in northern Europe. In a recent publication, Capistrano-Gossmann et al. (2017) have identified the actual wild beet gene involved (Rz2), using a complex but powerful molecular genetic process, a modified version of mapping-by-sequence together with the generation of a draft genome sequence and fine mapping. ((Gina G. Capistrano-Gossman et al. Crop wild relative populations of Beta vulgaris allow direct mapping of agronomically important genes. Nature Communications 8:15708. DOI:10.1038/ncomms15708))
But let’s leave aside the detailed methodology, including what the gene actually encodes! As far as readers of this blog are concerned, what is the significance of this piece of research? It all started with the existing knowledge that a large population of sea beet in Denmark contained some plants that showed the resistance trait, and in my recollection this population had been studied for many years. But success depended upon sampling plants (189 of them) directly from the in situ population that covered a stretch of at least 10 kilometers of the Danish coast. The magic is that, compared to conventional synthetic breeding populations, this wild population possessed a distinct benefit — many generations of ‘random’ outcrossing resulted in low linkage disequilibrium and high population admixture. This was the key to successfully fine-mapping and genomically pinpointing the causal gene within the beet DNA sequence.
As the authors rightly point out, their research not only demonstrates the value of crop wild relatives, but it also highlights the need for ensuring that populations of these wild relatives are adequately conserved in their natural habitats and are subjected to appropriate and detailed evaluation for useful traits.
There are some important points that arise from this. Firstly, this particular use of a crop wild relative is not direct in the sense of transferring the gene by way of a plant breeding programme, but lies in the molecular isolation of the gene, that could then be subsequently transferred by whatever means, including genetic manipulation of one sort or another. Secondly, ‘evaluation’ of germplasm conserved in situ is something that has not received much attention, to my knowledge. And thirdly, preserving the population’s size and integrity would be important in maintaining its population genetic structure and ‘power’. Allowing it to go through a genetic bottleneck would diminish its value.
It is fortunate that wild sea beet is not categorised by IUCN as being under threat and large outbreeding populations do exist. The genetic potential of one or two other wild beets (Beta patula, for example), with smaller population sizes, is more in question.
Brainfood: CWR prioritization, CWR data, Yam core redux, Traditional landscape value, African rice domestication, Digital conservation, First farmers, Revived breed, Mitigation targets, Zoonoses, Population, JEB on legumes
- Broadening the Base, Narrowing the Task: Prioritizing Crop Wild Relative Taxa for Conservation Action. Use socioeconomic value of crop, and potential usefulness and threat status of relative.
- Germinate 3: Development of a Common Platform to Support the Distribution of Experimental Data on Crop Wild Relatives. Useful in determining the second of the above.
- Re-defining the yam (Dioscorea spp.) core collection using morphological traits. Cleaning up the core.
- “Things are different now”: Farmer perceptions of cultural ecosystem services of traditional rice landscapes in Vietnam and the Philippines. 73 indicators for the contribution of landscapes to culture, aesthetics, and local knowledge.
- A single-nucleotide polymorphism causes smaller grain size and loss of seed shattering during African rice domestication. You want no shattering? You also get smaller seeds. Like it or edit it.
- Digital conservation: An introduction. Brave new world… Special issue of Ambio.
- The Genomic History Of Southeastern Europe. Souther Greek Neolithic farmers not same as other European Neolithic farmers.
- Genomics of a revived breed: Case study of the Belgian campine cattle. Racial impurities are confined to a few farms.
- Reducing emissions from agriculture to meet the 2 °C target. We’re doomed.
- Conservation of biodiversity as a strategy for improving human health and well-being. By keeping animals and their nasty diseases away from people, we’re not talking communing with Nature here.
- The interaction of human population, food production, and biodiversity protection. Minimise the interaction.
- Nature’s pulse power: legumes, food security and climate change. Special issue of Journal of Experimental Botany on legumes. Eat up your beans!
Brainfood: Canola model, Saline dates, High rice, Perennial wheat, European cowpea, Mesoamerican oil palm, Seed viability, Citrus identity, Poor cassava, Horse domestication, Wild tomatoes, Tea genome, Veggie breeding, Classical brassicas
- Development of a Statistical Crop Model to Explain the Relationship between Seed Yield and Phenotypic Diversity within the Brassica napus Genepool. Look for primary raceme area.
- Screening of Date Palm (Phoenix dactylifera L.) Cultivars for Salinity Tolerance. In Oman, Manoma and Umsila are particularly tolerant.
- Genetic structure and isolation by altitude in rice landraces of Yunnan, China revealed by nucleotide and microsatellite marker polymorphisms. Geneflow is horizontal, adaptation vertical.
- Breeding Perennial Grain Crops Based on Wheat. By adding a wild genome.
- European cowpea landraces for a more sustainable agriculture system and novel foods. 24 of them, no less. But you have to start somewhere, I suppose.
- Genetic diversity of Elaeis oleifera (HBK) Cortes populations using cross species SSRs: implication’s for germplasm utilization and conservation. From 532 palms in 19 populations to 34 individuals.
- Large-Scale Screening of Intact Tomato Seeds for Viability Using Near Infrared Reflectance Spectroscopy (NIRS). Good-bye germination tests?
- Genetic identification of ‘Limau Kacang’ (Citrus sp.), a local mandarin cultivated in West Sumatra by sequence-related amplified polymorphism (SRAP). It’s a ponkan.
- Cassava haplotype map highlights fixation of deleterious mutations during clonal propagation. Cassava is decaying genetically, but breeders are helping.
- Ancient genomic changes associated with domestication of the horse. The ancient DNA of immediate post-domestication horses suggests that the stallion bottleneck happened later.
- Genetic Diversity and Population Structure of Two Tomato Species from the Galapagos Islands. They mirror island formation.
- The Tea Tree Genome Provides Insights into Tea Flavor and Independent Evolution of Caffeine Biosynthesis. It evolved caffeine independently of coffee but not cacao. And flavour is down to a whole genome duplication.
- The contribution of international vegetable breeding to private seed companies in India. It can still make one, but for traits rather than varieties.
- Domestication, diversity and use of Brassica oleracea L., based on ancient Greek and Latin texts. Their use as a hangover cure has a long and august pedigree. No word on their raceme area.