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- W2891465117 abstract "The root lesion nematodes (RLN) Pratylenchus thornei and P. neglectus cause yield losses in intolerant field crops, internationally. They both have wide host ranges, invading grass and broadleaf grain crops, pasture species and weeds. Plant resistance, the ability of the plant to prevent nematode reproduction, is the main method of control, but requires accurate information on varietal resistance rankings to plan effective management strategies. This study used a multi environment trial (MET) analysis to examine the effect of cereal varieties (wheat, durum, barley and triticale) on the multiplication of P. thornei and P. neglectus when grown in a range of field environments at high and low pre-sowing nematode densities across a range of growing years. The study measured multiplication of P. thornei (68 varieties) and P. neglectus (62 varieties) in six and seven field experiments, respectively, each with high and low pre-sowing nematode densities, conducted during the years 2011–2014. This study showed genetic variation in the resistance ranking between cereal types and varieties for both P. thornei and P. neglectus. This provides management options to growers and information to breeding programs, which can be used to improve the resistance of future varieties. The consistent rankings across the field experiments and observed high genetic correlation between environments was unexpected given experiments were conducted across a range of years, soil types, geographic locations and different pre-sowing nematode densities. These high correlations suggested that varietal resistance can be determined with small numbers of field experiments, thus reducing the costs and time taken to determine varietal resistance. Finally, it was found that a lower pre-sowing nematode density resulted in a higher nematode multiplication rate compared to the high pre-sowing nematode density. This highlights the need to select resistant varieties to avoid large increases in nematode densities in fields with low nematode densities. This analysis of field experimental data for nematodes is novel and indicates that field data can be used to accurately assess varietal resistance (nematode multiplication) across environments. Therefore, accurate data on varietal resistance that is applicable over wide area can be produced with fewer experiments, resulting in varieties with increased resistance being planted, thus reducing grain yield losses due to root lesion nematodes." @default.
- W2891465117 created "2018-09-27" @default.
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- W2891465117 date "2018-12-01" @default.
- W2891465117 modified "2023-09-27" @default.
- W2891465117 title "Resistance to the root lesion nematodes Pratylenchus thornei and P. neglectus in cereals: Improved assessments in the field" @default.
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- W2891465117 doi "https://doi.org/10.1016/j.apsoil.2018.08.023" @default.
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