Three nozzles with droplet size between c.a.180 to 500 μm were evaluated in the control of tan spot caused by Pyrenophora tritici-repentis (Died.) Drechs. in three wheat cultivars. The use of drift reducing nozzles and a systemic fungicide led to satisfactory performance in the spray deposition, canopy penetration, yield grain, and control of the tan spot disease of wheat in the same way as could be expected from conventional nozzles.
Crop and Pasture Science
Volume 68 Number 7 2017
Large yield genotype by environment interactions generate uncertainty, complicating breeding selections. The identification of more heritable secondary traits offers opportunities for interpreting these interactions. We described specific traits relevant for assisting grain sorghum breeding selection on different temperate growth environments.
Using proteomics and bioinformatics tools, we investigated the response in root proteins under drought treatment in drought-tolerant and drought-sensitive soybeans. The drought-induced changes in root proteins were largely enriched in the biological function categories of defence response, protein synthesis, and energy, amino acid and carbohydrate metabolism. The different patterns of change of these proteins reflected the different drought-tolerance capacity of the soybean types.
CP17229Row spacing is more important than seeding rate for increasing Rhodes grass (Chloris gayana) control and grain yield in soybean (Glycine max)
Weeds are a problem in wide row spaced soybean. Results from field trials conducted over 2 years showed that weed biomass was less and soybean grain yield was more in the 25-cm soybean rows than the 75-cm rows. The results suggest that weeds can be better managed in soybean planted in narrow rows.
CP17169Identification of quantitative trait loci underlying seed oil content of soybean including main, epistatic and QTL×environment effects in different regions of Northeast China
Seven QTLs associated with soybean seed oil content were detected based on a RIL population derived from a cross between parents with large phenotypic difference across ten environments. These QTLs behaved additive and/or additive × environment interaction effects, which could account for 2.24–17.54% of the phenotypic variation in the different environments. Five epistatic pairwise QTLs were identified in different environments. These identified genetic information were valuable for marker-assisted breeding.
CP17154Growth responses of diploid and tetraploid perennial ryegrass (Lolium perenne) to soil-moisture deficit, defoliation and a root-feeding invertebrate
We investigated the growth response of a diploid and tetraploid cultivar of perennial ryegrass to moisture stress, severe defoliation and root-feeding invertebrates. Compensatory growth occurred after stress alleviation for both ploidies, although plant growth remained lower in previously stressed plants. The lower tiller density and total biomass of the tetraploid, in combination with greater allocation of resources to shoot growth and greater susceptibility to root-feeding invertebrates, may compromise its persistence in the field.
CP17131Modelling the comparative growth, water use and productivity of the perennial legumes, tedera (Bituminaria bituminosa var. albomarginata) and lucerne (Medicago sativa) in dryland mixed farming systems
A model of tedera (Bituminaria bituminosa var. albomarginata), proposed as an alternative perennial forage legume to lucerne (Medicago sativa), was developed in APSIM and tested. The model can be used for assessing tedera production, agronomic management options in Mediterranean Australia. The preliminary study indicates that tedera is not as effective as lucerne for total biomass production, but it may provide useful feed in terms of the timing of feed availability.
CP17115Analysis of seed production and its association with forage production and agronomic traits in orchardgrass (Dactylis glomerata) under different moisture conditions
Limited information is available about genetic diversity of seed yield and the potential of improve seed and forage yield, simultaneously. Thirty-six genotypes of orchardgrass were clonally propagated and evaluated in the field under two moisture environments during 3 years. The results of this study would be useful and important in improving cultivars which have both reasonable seed and forage yield.
CP16458Physiological and biochemical responses to water deficit in Lotus uliginosus × L. corniculatus hybrids
Response to water deficit stress of the parent species compared with interspecific hybrids of greater lotus × birdsfoot trefoil was analysed. Contrasting water-stress conditions were induced in vitro, in pots and under field conditions. Our results showed different responses in parental species for the particular traits evaluated, whereas hybrid progeny combined intermediate traits from parental species. Therefore, hybridisation seems a promising approach to create new variability between plants.
CP17009Embryological background of low seed set in distylous common buckwheat (Fagopyrum esculentum Moench) with biased morph ratios, and biostimulant-induced improvement of it
Yield of common buckwheat producing equal proportion of two flower morphs (isoplethy) is usually low due to several reasons. We have found that in semi-controlled conditions buckwheat plants may deviate from that equal proportion (anisoplethy) however without any consequences on seed set being similarly as in isoplethy state low due to the high frequency of abortive embryo sacs. Tested widely available plant biostimulants can be useful in increasing seed set via decreasing embryo abortions frequency contributing to yield improvement.
CP17029Comparative leaf water relations and anatomical responses of three vetch species (Vicia narbonensis L., V. sativa L. and V. villosa Roth.) to cope with water stress
Leaf water relations and anatomy of three vetches (Vicia narbonensis, V. sativa and V. villosa) are compared under water stress conditions to explain the superiority of the first species in terms of growth and productivity. Species reacted differently to maintain cells turgor; but V. narbonensis was distinguished by a more equilibrate water status through better osmotic adjustment and cell walls elasticity.
The peer-reviewed and edited version of record published online before inclusion in an issue
CP17126Differential nitrogen supply causes large variability in photosynthetic traits in wheat germplasm
This study evaluated variation in photosynthetic parameters at various growth stages in 43 wheat genotypes under optimal and low nitrogen supply. Based on all studied parameters, a dissimilarity matrix was constructed, separating the 43 genotypes into groups. Some genotypes appear to have relative tolerance to low nitrogen supply and a potential to be used in discerning the molecular basis of tolerance to low nitrogen supply.
CP17166Biosolids differently affect seed yield, nodule growth, nodule-specific activity, and symbiotic nitrogen fixation of field bean
Biosolids are organic fertilisers derived from treated and stabilised sewage sludge that are able to improve soil’s physical, chemical and biological properties, thus representing an alternative to the use of livestock manure for crops. Compared with mineral fertiliser, biosolids reduced N2 fixation of field bean, but increased seed yield. Biosolids can be utilised as slow-release nitrogen sources in legume crops.
CP17064Design, assessment and feasibility of legume-based cropping systems in three European regions
Due to environmental and future food challenges, legume crops should be promoted in European fields, after several decades of decreasing areas. As agronomic and environmental benefits of those crops are mainly measurable at the cropping system level, innovative cropping systems with grain legumes were designed by scientists and assessed with stakeholders. Feasible cropping systems were identified in three European local pedoclimatic contexts with improved performance compared with current cropping systems, and could thus be developed.
CP17178Alternate furrow irrigation affects yield and water-use efficiency of maize under deficit irrigation
Implementation of Alternate Furrow Irrigation (AFI) resulted in a significant saving in irrigation water and improved IWUE in corn production in a semi-arid region. Due to the severe shortage of fresh water for agricultural use in these regions, AFI has good potential for developing water-saving strategies for maize production.
CP17187Effects of ambient temperature and photoperiod on flowering time in faba bean (Vicia faba L.)
Flowering time is the most important adaptation trait of plants and is largely controlled by temperature and photoperiod. Evaluation of Australian faba bean genotypes found significant variation in flowering time, and in the plant responses to ambient temperature and photoperiod. This variation could be utilised to breed lines for specific growing environments, increasing yield, yield reliability and possibly expand the production zone into more marginal areas.
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.
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.
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.
CP17071Genotype by environment interactions in cowpea (Vigna unguiculata L. Walp.) grown in the Iberian Peninsula
Cowpea is one of the most widely adapted, versatile, and nutritious grain legumes. The aim of this work was to determine the genetic variability and environmental stability of 12 cowpea genotypes at three locations in the Iberian Peninsula in two consecutive years. This study could give rise to a breeding program to develop cowpea cultivars with interesting agronomic traits.
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.
CP16423Assessment of field pea (Pisum sativum L.) grain yield, aerial biomass and flowering date stability in Mediterranean environments
Mediterranean environments are of most interest in the current context of global climate change. In our work we have tested adaptation of nine pea cultivars in South European and North African locations, characterised by different agro climatic conditions within the Mediterranean climate. Our results highlighted the potential interest of genotypes HR1 and Desso in breeding programs and further studies of drought tolerance.
CP17068Performance of legume-based annual forage crops in three semi-arid Mediterranean environments
Legume-based annual forages, once optimized, could be pivotal to intensify sustainably drought-prone cereal-livestock systems. Production and farmers’ appreciation results collected for various legume and cereal species grown in monoculture and mixture in three sites of the western Mediterranean basin indicated that pea has much greater potential than hitherto believed. This encourages its breeding and cultivation for forage besides for grain.
CP17099Identification and multi-environment validation of resistance to rust (Uromyces viciae-fabae) in Vicia faba
Resistance to faba bean rust (Uromyces viciae-fabae) was identified by screening a large germplasm collection of Vicia faba under field conditions. Stability of resistance of the most-resistant accessions was further evaluated in a multi-location experiment and validated in three mega-environments defined in this work. These stable sources of resistance are highly promising to be included in international faba bean breeding programmes.
CP17087Improved grain yield of cowpea (Vigna unguiculata) under water deficit after inoculation with Bradyrhizobium elkanii and Rhizophagus irregularis
Cowpea is broadly cultivated in drought-prone areas and there is a need to address the water scarcity issue in agriculture. We assessed the effects of inoculation with a nitrogen-fixing bacterium and an arbuscular mycorrhizal fungus on plant performance and yield under water-deficit. Under moderate and severe water deficit, grain yield was increased in inoculated plants. The use of inoculated cowpea has great potential for sustainable agricultural production under drought conditions.
CP16459Weed response and crop growth in winter wheat–lucerne intercropping: a comparison of conventional and reduced soil-tillage conditions in northern France
Lucerne cover crop for winter wheat was studied as an alternative and sustainable weed-control strategy. Conventional and reduced tillage conditions, as well as presence or absence of cover crop were compared in terms of soil coverage and biomass of wheat, lucerne and weeds. Weed communities composition and functional group analysis were performed. To minimise cash-crop losses, the effect of several herbicide strategies controlling the cover crop under reduced tillage conditions were also tested.
CP17070Winter cover crops as green manure in a temperate region: the effect on nitrogen budget and yield of silage maize
The study evaluated the effect of cover crops-legume, cereal, their mixture used as green manure, two doses of N fertilisation, and an unfertilised fallow as a control on the soil nitrogen budget and yield of silage maize (Zea mays L.). The highest value of apparent N remaining in the soil was in the mixture while the N fertilisation treatments and the control had significantly lower average values of residual N.
Heat stress, during reproductive phase, is a major threat to productivity of grain legumes. This review describes the impact of heat stress on photo-assimilation, grain quality and development processes, and proposes innovative strategies to improve heat tolerance in grain legumes.
CP17055Development of new kabuli large-seeded chickpea materials with resistance to Ascochyta blight
In this work 11 advanced chickpea lines with resistance to Ascochyta bligt and large seeds were developed as a result of the selection carried out during 10 successive years. Molecular markers associated with the resistance to blight were applied.
CP16396Better management of intensive rotational grazing systems maintains pastures and improves animal performance
This paper examines how the management of intensive rotational grazing systems influences pasture composition, diet quality and livestock performance. There was substantial opportunity to enhance the production of intensive rotational grazing systems through fast rotations at a high stocking rate. Intensive rotational grazing can be managed flexibly to improve animal performance by using green herbage allowance, with higher allowances needed as feed quality declines.
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.
CP16405An initial investigation of forage production and feed quality of perennial wheat derivatives
A redesign of agricultural production away from annual grain crops to a system that utilizes perennial grain crops, offers an opportunity to improve sustainable grain production and food security into the future. An important component in this redesign will be the profitable integration of livestock into the system through grazing. This study demonstrates that early generation perennial grain crops can be used as successful dual purpose crops and deployment of commercial cultivars may soon be at hand.
CP17067In vitro-assisted single-seed descent for breeding-cycle compression in subterranean clover (Trifolium subterraneum L.)
Subterranean clover is grown on over 29 Mha in southern Australia but its annual rate of genetic improvement is constrained by a long lifecycle. We present an in vitro-assisted single-seed descent system (IVASSD) to enable the turnover of up to 6.1 generations per year. To demonstrate the applicability of the system within a plant-breeding program, we have validated the IVASSD technique on a segregating breeding population, resulting in the turnover of three generations in less than one year.
CP17052Performance of lucerne genotypes for biomass production and nitrogen content differs in monoculture and in mixture with grasses and is partly predicted from traits recorded on isolated plants
On a set of 46 lucerne genotypes, a positive correlation between the performance of genotypes in monoculture and in mixture was obtained. However, significant changes in genotype ranking indicated that the species of its neighbours could modify the relative performance of a genotype. Traits measured on the same genotypes grown in isolated plants explained competition intensity depending on the neighbour species.
CP16460Identification of new resistance sources to powdery mildew, and the genetic characterisation of resistance in three common bean genotypes
Powdery mildew is a devastating disease of many legume species, including common bean. In this work, we assessed the responses of 108 dry and snap bean accessions to PM, and characterized the genetic control of the resistance in three bean genotypes. This work provides new PM-resistance sources and markers linked to resistance genes, which will be very useful in common bean breeding programs focused on protecting bean crops against this disease.
CP17002Changes in yield and agronomic traits of soybean cultivars released in China in the last 60 years
Planting density decreased significantly in the Yellow-Huai-Hai summer and South soybean regions but did not significantly change in the North spring soybean region. The increased soybean yields were mainly due to increased 100-seed weight and seed number per plant. Seed protein content has not significantly changed in 60 years, but oil content has increased in all three regions.
CP16395Enhancing composition and persistence of mixed pasture swards in southern New South Wales through alternative spatial configurations and improved legume performance
The study examined whether the productivity and persistence of mixed pastures were improved if species were spatially separated rather than being sown together in each drill row. Results of the present study were highly site-specific, or season-dependent, but subterranean clover regeneration was consistently improved where it was spatially separated from lucerne. There were fewer consistent benefits of alternative spatial configurations on swards containing phalaris with subterranean clover or with lucerne.
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.
Cold-season dormancy and prostrate habit may challenge the selection of grazing-tolerant lucerne (Medicago sativa L.) for mild-winter environments. The genetic variation and genetically based trade-offs for key traits (grazing tolerance, dormancy, plant morphology) and their implications for selection were assessed in different genetic backgrounds. The selection for grazing-tolerant germplasm can rely on large genetic variation, but it requires extensive genotype evaluation to produce material with acceptable dormancy and growth habit.
Six grazing-management treatments were applied for 3 years to a tall fescue–white clover pasture in northern Victoria.A grazing regime based up the 3-leaf stage resulted in 30% higher dry matter removal, higher tall fescue content and greater plant persistence compared to the most frequently grazed treatments.The practicality of this approach to grazing tall fescue needs to be tested at the whole-farm level.
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.
CP16383Use of sensor-determined behaviours to develop algorithms for pasture intake by individual grazing cattle
Practical and reliable measurement of individual pasture intake will improve precision in livestock and pasture management, provide input data for prediction and simulation models, and allow animals to be ranked on grazing efficiency for genetic improvement. We used sensors to determine pasture intake of individual grazing cattle. Grazing behaviour classified using data from collar-mounted sensors, and benchmark pasture-intake data, allowed establishment of initial pasture-intake algorithms for use with sensors.
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.
Sward structural characteristics and herbage accumulation of Piatã palisade grass in a crop-livestock-forest integration area
Seed production trait associations and inheritance in interspecific hybrids between Trifolium repens (white clover) and Trifolium uniflorum
Elevated field atmospheric CO2 concentrations affect the characteristics of winter wheat (cv. Bologna) grains
Biological nitrification inhibition in weeds: Wild radish, brome grass, wild oats and annual ryegrass decrease nitrification rates in their rhizospheres.
Can legumes provide greater benefits than millet as a spring cover crop in southern Queensland farming systems?
An assessment of weed flora 14 years after the introduction of glyphosate-tolerant cotton in Australia
Effects of individual and combined heat and drought stress during seed filling on the oxidative metabolism and yield of chickpea (Cicer arietinum L.) genotypes differing in heat and drought tolerance
Persistence and productivity of phalaris (Phalaris aquatica L.) germplasm in dry marginal rainfall environments of south-eastern Australia
Biplot evaluation of test environments and identification of durable Fusarium wilt resistant genotypes of lentils in India
Carbohydrate source and season influence vegetative growth flush allometry in pruned macadamia stems
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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
Crop and Pasture Science 68 (6)James R. Hunt
Abiotic stress tolerance of kikuyu (Cenchrus clandestinus) and some related grasses and potential of kikuyu for agricultural and urban environmentsCrop and Pasture Science 68 (3)Duncan Fraser, Peter Sharp, Nabil Ahmad, Brett Morris, Richard Trethowan
Crop and Pasture Science 68 (6)Sarah Mansfield, Richard J. Chynoweth, Mark R. H. Hurst, Alasdair Noble, Sue M. Zydenbos, Maureen O'Callaghan
Effects of pasture base and species mix complexity on persistence and weed ingress in summer-dry dairy pasturesCrop and Pasture Science 68 (6)K. N. Tozer, E. M. K. Minnee, R. M. Greenfield, C. A. Cameron
Crop and Pasture Science (Online Early)Xuehua Zhang, W. G. Dilantha Fernando
Crop and Pasture Science 67 (12)Brian L. Machovina, Kenneth J. Feeley, Brett J. Machovina
Effects of straw management, inorganic fertiliser, and manure amendment on soil microbial properties, nutrient availability, and root growth in a drip-irrigated cotton fieldCrop and Pasture Science 67 (12)X. Z. Pu, G. J. Zhang, P. P. Zhang, Y. J. Liu, W. F. Zhang
Modelling the comparative growth, water use and productivity of the perennial legumes, tedera (Bituminaria bituminosa var. albomarginata) and lucerne (Medicago sativa) in dryland mixed farming systemsCrop and Pasture Science 68 (7)Chao Chen, Andrew Smith, Phil Ward, Andrew Fletcher, Roger Lawes, Hayley Norman
Crop and Pasture Science (Online Early)Muhammad Farooq, Faisal Nadeem, Nirmali Gogoi, Aman Ullah, Salem S. Alghamdi, Harsh Nayyar, Kadambot H. M. Siddique
Crop and Pasture Science 68 (6)Davinder Kaur, Satvir Kaur Grewal, Jagmeet Kaur, Sarvjeet Singh
Prospects to utilise intercrops and crop variety mixtures in mechanised, rain-fed, temperate cropping systemsCrop and Pasture Science 67 (12)Andrew L. Fletcher, John A. Kirkegaard, Mark B. Peoples, Michael J. Robertson, Jeremy Whish, Antony D. Swan
Crop and Pasture Science 68 (7)Ana J. P. Carcedo, Pedro A. Pardo, Brenda L. Gambin
Crop area increases drive earlier and dry sowing in Western Australia: implications for farming systemsCrop and Pasture Science 67 (12)Andrew Fletcher, Roger Lawes, Cameron Weeks
Organisms with potential to assist in the control of Helicoverpa armigera in Australian cotton production systemsCrop and Pasture Science 67 (12)Oliver G. G. Knox, Chris M. T. Anderson, Jenna L. Ross, Colin C. R. Tann, Vadakattu V. S. R. Gupta
Crop and Pasture Science 68 (5)Roopali N. Bhoite, Ping Si, Katia T. Stefanova, Kadambot H. M. Siddique, Guijun Yan
Expression and heritability of late flowering and other quantitative traits in cultivated×Australian wild mungbean hybridsCrop and Pasture Science 67 (12)Thuan D. Nguyen, Hang T. T. Vu, L. M. Bielig, R. J. Lawn
Crop and Pasture Science 68 (7)Juan J. Olivet, Juana Villalba, Jorge Volpi
Row spacing is more important than seeding rate for increasing Rhodes grass (Chloris gayana) control and grain yield in soybean (Glycine max)Crop and Pasture Science 68 (7)Ghulam Rasool, Gulshan Mahajan, Rajpaul Yadav, Zarka Hanif, Bhagirath Singh Chauhan
The role of FLOWERING LOCUS C in vernalization of Brassica: the importance of vernalization research in the face of climate changeCrop and Pasture Science (Online Early)Daniel J. Shea, Etsuko Itabashi, Satoko Takada, Eigo Fukai, Tomohiro Kakizaki, Ryo Fujimoto, Keiichi Okazaki