This report has newinformation from four Recommended Lists trials in Lincolnshire, Shropshire,Herefordshire and Norfolk. Yields are reported as a gross output, which is theseed yield adjusted for oil content. The values are represented as a percentageof the control varieties Vision, PR46W21, DK Cabernet and PT211. Presenting values this way enables you tocompare varieties performance at different sites and across years.
Oilseed rapetrials can be more variable than cereals and care must be taken when drawingconclusions on limited data.
2015 abovefour-year average
The 2015 grossoutput value of 5.89 t/ha is above the four-year average of 5.35 t/ha. The Lincolnshiretrial produced a high gross output yield of the control varieties of 6.70 t/ha.
This provides asnapshot as to how varieties performed in 2015 but four-year average valuesprovide a better picture of varietal performance.
In 2015, across thesix trial sites, higher yielding varieties include Arazzo (106%), Charger (105%),Incentive (106%), Campus (105%), V316OL (104%), Fencer (104%) and Avatar (103%).
Based on thefour-year average values, the highest yielding varieties to date are V316OL ahigh oleic, low linoleic (HOLL) variety at 107%, Incentive (107%), Charger(106%), Arazzo (106%), Campus (106%), SY Harnas (105%), Popular (105%), Picto(105%) and Fencer (104%).
Clubrootresistant Mentor, new to the Recommended Lists for 2015/16, recorded a grossoutput of 102%, comparing favourably with established clubroot resistantvariety Cracker (94%).
Candidates showstrong performance
Gross outputvalues for the candidate varieties show these new varieties are performing wellon the four-year average values. Elgar, Nikita and Windozz have a four yearaverage gross output of 109%, Wembley 108%, Einstein and Precision 107%.
The turnipyellows virus (TuYV) resistant variety Amalie, a specialist candidate variety,currently has a gross output of 100% in the four-year average.