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Complete genome sequence of mycoplasma pullorum isolated from domestic chickens
12 Jul 2018The 1,007,172-bp complete genome of Mycoplasma pullorum strain B359_6, isolated from domestic chickens, has been sequenced, assembled, and annotated.
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Genetic parameters for FAMACHA score and related traits for host resistance/resilience and production at differing severities of worm challenge in a Merino flock in South Africa
02 Sep 2009The objectives of this study were to estimate genetic parameters for FAMACHA score and related traits at different levels of worm challenge in sheep and to assess the effect of different methods for modelling records from treated lambs on estimates of genetic parameters. Data were collected over five consecutive Haemonchus seasons from a total of l671 Merino lambs using the FAMACHA clinical evalu…
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Whole genome-based characterization of Listeria monocytogenes isolates recovered from the food chain in South Africa
02 Mar 2022Listeria monocytogenes is an important foodborne pathogen which has the ability to adapt and survive in food and food processing facilities where it can persist for years. In this study, a total of 143 L. monocytogenes isolates in South Africa (SA) were characterized for their strain’s genetic relatedness, virulence profiles, stress tolerance and resistance genes associated with L. monocytoge…
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Adaptive variation for growth and resistance to a novel pathogen along climatic gradients in a foundation tree
15 Aug 2020Natural ecosystems are under pressure from increasing abiotic and biotic stressors, including climate change and novel pathogens, which are putting species at risk of local extinction, and altering community structure, composition and function. Here, we aim to assess adaptive variation in growth and fungal disease resistance within a foundation tree, Corymbia calophylla to determine local ada…
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Efficiencies of stationary sampling tools for the tsetse fly Glossina fuscipes fuscipes in western Kenya
10 Jan 2022Monitoring the effectiveness of tsetse fly control interventions that aim to reduce transmission of African trypanosomiasis requires highly efficient sampling tools that can catch flies at low densities. The sticky small target (StS-target) has previously been shown to be more effective in sampling Glossina fuscipes fuscipes compared to the biconical trap. However, its efficiency in terms of the …
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Differential metabolic reprogramming in paenibacillus alvei-primed sorghum bicolor seedlings in response to fusarium pseudograminearum infection
05 Aug 2020Metabolic changes in sorghum seedlings in response to Paenibacillus alvei (NAS-6G6)-induced systemic resistance against Fusarium pseudograminearum crown rot were investigated by means of untargeted ultra-high performance liquid chromatography-high definition mass spectrometry (UHPLC-HDMS). Treatment of seedlings with the plant growth-promoting rhizobacterium P. alvei at a concentration of 1 × 108…
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Afrotropical Culicoides : C. (Avaritia) spinifer Khamala & Kettle, 1971, a name based on an artefact (Diptera : Ceratopogonidae)
06 Oct 2014Culicoides (Avaritia) spinifer Khamala & Kettle, 1971, is made a junior subjective synonym of C. (A.) glabripennis Goetghebuer, 1935.
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Anastomosis groups and pathogenicity of Rhizoctonia solani and binucleate Rhizoctonia from potatoes in South Africa
16 Feb 2016A survey of anastomosis groups (AGs) of Rhizoctonia species associated with potato diseases was conducted in South Africa. A total of 112 Rhizoctonia solani and 19 binucleate Rhizoctonia (BNR) isolates were recovered from diseased potato plants, characterized for AG and pathogenicity. The AG identity of the isolates was confirmed using phylogenetic analysis of the internal transcribed spacer …
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Evidence for an ancient whole genome duplication in the cycad lineage
30 Oct 2017Contrary to the many whole genome duplication events recorded for angiosperms (flowering plants), whole genome duplications in gymnosperms (non-flowering seed plants) seem to be much rarer. Although ancient whole genome duplications have been reported for most gymnosperm lineages as well, some are still contested and need to be confirmed. For instance, data for ginkgo, but particularly cycads…
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Insect gallers and their plant hosts : from omics data to systems biology
26 May 2017Gall-inducing insects are capable of exerting a high level of control over their hosts’ cellular machinery to the extent that the plant’s development, metabolism, chemistry, and physiology are all altered in favour of the insect. Many gallers are devastating pests in global agriculture and the limited understanding of their relationship with their hosts prevents the development of robust mana…