Crop and Pasture Science
Volume 69 Number 1 2018
Brassica 2016 – Phenomics to Genomics and Everything in Between
CP16404Changes in farming practices impact on spore release patterns of the blackleg pathogen, Leptosphaeria maculans
Changes in farming practices such as inter-row sowing, has impacts on stubble retention such that some stubble remains standing at the start of the following season. Spore release patterns for the blackleg fungus, Leptosphaeria maculans, are delayed as well as reduced in standing stubble compared to laying down stubble. These changes in spore release patterns has the potential to impact of disease epidemiology.
CP16445Host–pathogen interactions in relation to management of light leaf spot disease (caused by Pyrenopeziza brassicae) on Brassica species
Light leaf spot (caused by Pyrenopeziza brassicae) is an increasingly damaging disease of oilseed rape (Brassica napus) and vegetable brassicas. This paper reviews the disease epidemiology, pathogen population structure and host range, and disease management strategies. Use of new genomic information to improve understanding of the molecular interactions between B. napus and P. brassicae and of the pathogen population structure is discussed.
CP16411Changes in allele frequencies of avirulence genes in the blackleg fungus, Leptosphaeria maculans, over two decades in Australia
Avirulence allele frequencies change in response to selection pressure from sowing of cultivars with the corresponding major gene resistance. Analysis of 2091 isolates collected over the past 20 years shows how allele frequencies have changed in Australia in response to cultivar use and which major resistance genes are at risk of being overcome in the field.
CP16468The role of FLOWERING LOCUS C in vernalization of Brassica: the importance of vernalization research in the face of climate change
This review summarises the literature to date regarding vernalization research in Brassicaceae, providing both a historical context and current understanding of the molecular mechanisms involved. We cover the evolutionary conserved biology between the model organism Arabidopsis thaliana and Brassica genus crops and contrast the differences between the genera to show the importance of Brassica-specific research into vernalization.
ToC Abstract: Blackleg is the most serious disease in canola in western Canada. The review highlights the present issues faced by growers and the industry due to the blackleg disease. The review also highlights a new strategy, R-gene rotation introduced to suit the Canadian situation in order to mitigate the disease and increase yield.
CP16351Development of an ultrasound-assisted extraction method for the rapid quantification of seed carotenoid content in oilseed rape
The nutritional value of rapeseed oil is significantly improved by breeding new cultivars with high seed carotenoid content, successful development of an efficient method for the quantification of carotenoids in oilseed rape is a prerequisite for this breeding initiative, a rapid, accurate, simple and low cost protocol was successfully developed by using ultrasound-assisted extraction.
Spring canola is a very young crop type, less than fifty years old. Australian and Chinese spring canola look different but are very similar genetically, although with many deletions and duplications of chromosome segments. These chromosome deletions and duplications, coupled with strong inbreeding and selection for different traits, may have helped shape spring canola in China and Australia.
CP17140Detection, prevalence and severity of upper canopy infection on mature Brassica napus plants caused by Leptosphaeria maculans in Australia
Infection of flowers, peduncles, siliques, main stems and branches of canola by Leptosphaeria maculans has increased in prevalence and severity in Australian canola-growing regions since 2011. The term upper canopy infection is proposed to encompass these symptoms as they generally occur together on the same plant and appear after the plant has undergone elongation. Earlier onset of flowering is a key risk factor for more severe upper canopy infection, however, host genetic resistance may be an effective control strategy.
CP17214Genome-wide identification and comparative analysis of NBS-LRR resistance genes in Brassica napus
NBS-LRR genes play an important role in plant disease resistance. We have identified and characterised these genes in three cultivated Brassica species and found that many were clustered and duplicates. These genes are valuable for identification of disease resistance genes underlying QTL or GWAS regions.
CP17193Introgression of allelic diversity from genetically distinct variants of Brassica rapa into Brassica napus canola and inheritance of the B. rapa alleles
Brassica napus × B. rapa interspecific crosses were made to introgress exotic alleles from B. rapa into B. napus canola. Progeny of this interspecific cross stabilised into B. napus type only. Of the theoretical expected number of SSR alleles of B. rapa, only 45% of the alleles were detected in F4 and F8 plants suggesting that the loss of alleles occurred prior to the F4 generation. Genetically distinct canola quality lines were developed from these interspecific crosses by using genetically diverse B. rapa lines in the crosses.
CP17394Identification of DNA methylated regions by using methylated DNA immunoprecipitation sequencing in Brassica rapa
We identified the methylated regions in two Chinese cabbage inbred lines (Brassica rapa) by MeDIP-seq (methylated DNA immunoprecipitation sequencing). Differentially methylated regions between the inbred lines were analysed. We found genes having DNA methylation in intron and 200 bp upstream and downstream regions tended to be silenced, and this heavy methylation was targeted at the interspersed repeats regions such as transposable elements or repetitive sequences within these regions.
These articles have been peer reviewed and accepted for publication. They are still in production and have not been edited, so may differ from the final published form.
Physiological responses of drought tolerance in orchardgrass in association with persistence and summer dormancy
Chloroplast structure and DNA methylation polymorphisms in an albino mutant of Xinong 1376 wheat (Triticum aestivum L.) cultivar
Spatio-temporal characterization of changes in the resistance of widely grown soybean cultivars to Soybean mosaic virus across a century of breeding in China
Indirect selection for potential yield in early generation, spaced plantings of wheat and other small grain cereals: a review.
Calorimetry, chemical composition and in vitro digestibility of sugarcane treated with calcium hydroxide
Evaluation of lentil varieties and farming system effect on seed damage and yield loss due to bruchid infestation
Changes in DNA methylation are associated with heterogeneous cytoplasm suppression of the multi-ovary gene in wheat (Triticum aestivum L.)
Changes in seed composition and germination of wheat and pea when exposed to high temperatures during grain filling and maturation
Stomatal and photochemical limitations of photosynthesis in Coffea spp. plants subjected to elevated temperatures
The effect of tree density on competition between Leucaena leucocephala and Chloris gayana using a Nelder wheel trial: I. Above-ground interactions
Modern hexaploid wheat differs from diploid and tetraploid ancestors in the importance of stress tolerance vs. stress avoidance
Crop yield responses to surface and subsoil applications of poultry litter and inorganic fertiliser in south eastern Australia
Seed germination response of a noxious agricultural weed Echium plantagineum to temperature and light, pH, drought stress, salinity, heat and smoke
ASSESSING THE ROLE OF GENETICS FOR IMPROVING THE POTENTIAL YIELD OF AUSTRALIA’S MAJOR GRAIN CROPS ON ACID SOILS
A cytological and molecular analysis of D-genome chromosome retention in the F2 to F6 generation of hexaploid/tetraploid wheat crosses
Mapping quantitative trait loci for cold tolerance at the booting stage in rice using chromosome segment substitution lines
Molecular and Phenotypic Diversity among Chickpea (Cicer arietinum L.) genotypes as a function of drought tolerance
Sodium-silicate and calcium-silicate differentially affect silicon and aluminium uptake, antioxidant performance and phenolics metabolism of ryegrass in an acid Andisol
Combining ability and heterosis analysis for mineral elements using CMS systems in non-heading Chinese cabbage (Brassica rapa L.)
Assessment of crop management strategies to improve soybean resilience to climate change in Southern Brazil
Intrinsic capacity for nutrient foraging predicts critical external phosphorus requirement of 12 pasture legumes
No longer a west-side story – pesticide resistance discovered in the eastern range of a major Australian crop pest, Halotydeus destructor (Acari: Penthaleidae)
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Winter cover crops as green manure in a temperate region: the effect on nitrogen budget and yield of silage maizeCrop and Pasture Science 68 (11)B. Ćupina, S. Vujić, Dj. Krstić, Z. Radanović, R. Čabilovski, M. Manojlović, D. Latković
Host–pathogen interactions in relation to management of light leaf spot disease (caused by Pyrenopeziza brassicae) on Brassica speciesCrop and Pasture Science 69 (1)Chinthani S. Karandeni Dewage, Coretta A. Klöppel, Henrik U. Stotz, Bruce D. L. Fitt
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Use of sensor-determined behaviours to develop algorithms for pasture intake by individual grazing cattleCrop and Pasture Science 68 (12)P. L. Greenwood, D. R. Paull, J. McNally, T. Kalinowski, D. Ebert, B. Little, D. V. Smith, A. Rahman, P. Valencia, A. B. Ingham, G. J. Bishop-Hurley
Elevated field atmospheric CO2 concentrations affect the characteristics of winter wheat (cv. Bologna) grainsCrop and Pasture Science 68 (8)Francesca Verrillo, Franz-Werner Badeck, Valeria Terzi, Fulvia Rizza, Letizia Bernardo, Antimo Di Maro, Clara Fares, Alessandro Zaldei, Francesco Miglietta, Anna Moschella, Marcella Bracale, Candida Vannini
In-field methods for rapid detection of frost damage in Australian dryland wheat during the reproductive and grain-filling phaseCrop and Pasture Science 68 (6)Eileen M. Perry, James G. Nuttall, Ashley J. Wallace, Glenn J. Fitzgerald
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Quantifying the interactions between defoliation interval, defoliation intensity and nitrogen fertiliser application on the nutritive value of rainfed and irrigated perennial ryegrassCrop and Pasture Science 68 (12)K. G. Pembleton, R. P. Rawnsley, L. R. Turner, R. Corkrey, D. J. Donaghy
Enhancing composition and persistence of mixed pasture swards in southern New South Wales through alternative spatial configurations and improved legume performanceCrop and Pasture Science 68 (12)Richard C. Hayes, Guangdi D. Li, Graeme A. Sandral, Tony D. Swan, Andrew Price, Shane Hildebrand, Laura Goward, Chris Fuller, Mark B. Peoples
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Changes in farming practices impact on spore release patterns of the blackleg pathogen, Leptosphaeria maculansCrop and Pasture Science 69 (1)J. McCredden, R. B. Cowley, S. J. Marcroft, A. P. Van de Wouw
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