Please find the latest journal publications from the Crop Centre listed below.
Read our articles in the Vegetable Farmer
For a full list of publications from the School of Life Sciences please visit the Latest Journal Publications
Transcriptome and organellar sequencing highlights the complex origin and diversification of alloteraploid Brassica napus
Hong An, Xinshuai Qi, Michelle L. Gaynor, Yue Hao, Sarah C. Gebken, Makenzie E. Mabry, Alex C. McAlvay, Graham R. Teakle, Gavin C. Conant, Michael S. Barker, Tingdong Fu, Bin Yi, and J. Chris Pires
Brassica napus, an allotetraploid crop, is hypothesized to be a hybrid from unknown varieties of Brassica rapa and Brassica oleracea. Despite the economic importance of B. napus, much is unresolved regarding its phylogenomic relationships, genetic structure, and diversification. Here we conduct a comprehensive study among diverse accessions from 183 B. napus (including rapeseed, rutabaga, and Siberian kale), 112 B. rapa, and 62 B. oleracea and its wild relatives. This study highlights the complex origin and evolution of B. napus providing insights that can further facilitate B. napus breeding and germplasm preservation.
Susceptibility of Myzus persicae, Brevicoryne brassicae and Nasonovia ribisnigri to Fungal Biopesticides in Laboratory and Field Experiments
Gill Prince, Dave Chandler
The aim of this study was to evaluate the potential of entomopathogenic fungi (EPF) for the control of aphid pests of field vegetable crops.
Four biopesticides based on the EPF Beauveria bassiana (Botanigard ES and Naturalis L), Cordyceps fumosorosea s.l. (Preferal WG), and Akanthomyces dipterigenus (Vertalec) were evaluated in a laboratory bioassay against peach-potato aphid Myzus persicae, cabbage aphid Brevicoryne brassicae, and currant-lettuce aphid Nasonovia ribisnigri.
There was significant variation in the spore dose provided by the products, with Botanigard ES producing the highest dose (639 viable spores per mm2). Botanigard ES also caused more mortality than the other products. Combining Vertalec with the vegetable oil-based adjuvant Addit had an additive effect on the mortality of B. brassicae. All fungal products reduced the number of progeny produced by M. persicae but there was no effect with B. brassicae or N. ribisnigri. When aphid nymphs were treated with Botanigard ES and Preferal WG, both products reduced population development, with up to 86% reduction occurring for Botanigard ES against M. persicae. In a field experiment, Botanigard ES sprayed twice, at seven-day intervals, against B. brassicae on cabbage plants, reduced aphid numbers by 73%. In a second field experiment with B. brassicae, M. persicae, and N. ribisnigri, Botanigard ES reduced populations of B. brassicae and N. ribisnigri but there was no significant effect on M. persicae.
A future workforce of food-system analysts - Nature Food
The piece, authored collaboratively by members of the IFSTAL team, including Rosemary Collier from Warwick's School of Life Sciences, sets out the case for a systems approach to challenges in the food system and highlights the aspirations of the programme.
IFSTAL’s successes to date – including the engagement of 1,500 students from 45 different university departments as well as the programme’s well established overseas activity – are also laid out.
The article, A future workforce of food-system analysts, is available to read on the Nature Food website.
Identification and QTL mapping of resistance to Turnip yellows virus (TuYV) in oilseed rape, Brassica napus
Dieter Hackenberg, Elvis Asare‑Bediako. Adam Baker, Peter Walley, Carol Jenner, Shannon Greer, Lawrence Bramham, Jacqueline Batley, David Edwards, Regine Delourme, Guy Barker, GrahamTeakle, John Walsh
Turnip yellows virus (TuYV) is transmitted by the peach-potato aphid (Myzus persicae) and causes severe yield losses in commercial oilseed rape crops (Brassica napus). There is currently only one genetic resource for resistance to TuYV available in brassica, which was identified in the re-synthesised B. napus line ‘R54’. In our study, 27 mostly homozygous B. napus accessions, representing a diverse subset of the B. napus genepool, were screened for TuYV resistance/susceptibility. This is the first report of the QTL mapping of TuYV resistance in natural B. napus.
Extended studies of interspecific relationships in Daucus (Apiaceae) using DNA sequences from ten nuclear orthologues
Martínez-Flores, Fernando, Crespo, Manuel B., Geoffriau, Emmanuel, Allender, Charlotte J., Ruess, Holly, Arbizu, Carlos I., Simon, Philipp and Spooner, David M
Daucus has traditionally been estimated to comprise 21–25 species, but a recent study expanded the genus to c. 40 species. The present study uses ten nuclear orthologues to examine 125 accessions, including 40 collections of 11 species newly examined with nuclear orthologues. We propose the new combination Daucus junceus (Durieua juncea) for a neglected species endemic to the south-western Iberian Peninsula often referred to as D. setifolius, and we place D. arcanus in synonymy with D. pusillus. Three lectotypes are also designated.
Assembly and characterisation of a unique onion diversity set identifies resistance to Fusarium basal rot and improved seedling vigour
Conserving biodiversity is critical for safeguarding future crop production. Onion (Allium cepa L.) is a globally important crop with a very large (16 Gb per 1C) genome which has not been sequenced. Onion yield losses regularly occur worldwide due to Fusarium basal rot. Accessions with strong basal rot resistance and increased seedling vigour were identified along with associated markers, confirming the utility of the diversity set for discovering beneficial traits. The onion diversity set and associated trait data therefore provide a valuable resource for future germplasm selection and onion breeding.