Wheat Variety Trials Trent Potter, SARDI, 08 8762 9132, trent.potter@sa.gov.au Rob Wheeler, SARDI Key Outcomes: Look at stripe rust scores and yield with and without stripe rust control Barley Yellow Dwarf Virus (BYDV) had a large effect on yield at many sites Trial Objectives: To assess the yield of a range of wheat varieties at several sites Trial Duration: 2010-11 Location: Various Soil Type: Various Paddock History: Various Monthly Rainfall: Farmer Co-operators: Kim Makin, Ross Lutt, Peter & Jim McLellan, Lachie Seears, Martin & Kirsty Flower, James & Chris Gilbertson Rain Jan Feb Mar Apr May June Jul Aug Sep Oct Nov Dec April-Oct Total Keith, 2010 15.6 31.3 28.4 55.2 32.4 38.8 40.4 96.2 57 18.8 27.4 137.8 338.8 579.3 Sherw ood, 2010 13 33.5 33.5 58.5 33.5 40.5 31.5 113 57.5 30 50 105 364.5 599.5 Wolseley, 2010 14 28.8 26.8 70.8 26.8 35.6 39.8 111 45.8 27 59.6 129.6 356.8 615.6 Frances, 2010 14.4 40.8 26.8 60.6 31.6 57.6 43.8 119.2 55.4 29.8 29.2 92.2 398 601.4 Conmurra, 2010 18 35.2 24.8 65.2 42 77.4 48.8 146.8 74.8 29.4 27.4 130.2 484.4 720 Millicent, 2010 16 30.8 23.2 89.2 44.4 74 76.2 192.8 83.8 22.4 51.4 105.2 582.8 809.4 Yield Limiting Factors: Dry September and October. BYDV at Conmurra, Millicent and Frances. Type of Trial: Replicated Plot Trial Trial Design: 8m Long Plots x 8 Rows at 15cm Spacings (1.2m); 3 or 5 Replicates (depending on site) Treatments: All trials were sown with small plot equipment and managed as per usual agronomic treatment. All sites were sprayed with fungicides to control any stripe rust. Grain yield was determined by machine harvest. Rankings of wheat varieties within the individual trials at Frances, Conmurra and Millicent were determined and detailed in Table 6.
WHEAT Table 1: 2010 Upper South East Wheat Trials and Long Term Results Long Term average across sites 2010 (% site average) (2004-2010) Variety Keith Sherwood Wolseley Yield (T/ha) as %site av. # trials AGT Katana 100 108 3.94 104 10 Axe 90 109 3.84 101 16 Barham 92 76 3.7 97 13 Catalina 94 93 3.8 100 11 Clearfield Jnz 103 102 3.69 97 8 Correll 99 91 3.89 103 13 Derrimut VARIABLE 99 108 3.93 104 13 Espada NO 95 101 3.95 104 11 Estoc 105 107 3.91 103 8 Frame VALID 93 79 3.7 97 16 Gladius RESULT 86 95 3.95 104 13 Guardian 104 108 4.01 106 11 Justica CL PLUS 108 106 Kord CL PLUS 83 88 Lincoln 100 93 3.89 102 10 Mace 111 119 4.1 108 5 Magenta 96 96 3.86 102 11 Peake 99 101 3.93 103 13 Pugsley 105 89 3.93 104 16 Scout 114 109 4.09 108 5 Wyalkatchem 109 122 3.99 105 16 Yitpi 100 96 3.89 103 16 Young 102 101 3.87 102 16 Site av. (Yld t/ha) 5.91 4.58 3.79 LSD (%) 7 7 Keith Sherwood Wolseley Date sown 31-May 17-May 17-May Soil Type L delved S C A-O Rain (2010) 339 365 357 phwater 8.2 7.2 8.3 Site stresses wg Abbreviations Soil type: S=sand, L=loam, C=clay, Li=light, M=medium, H=heavy, F=fine Site stress factors: e=emergence(eg. mice), lr=leaf rust, r=rhizoctonia, wg=grassy weeds, Data source: NVT & SARDI/GRDC (long term data based on weighted analysis of sites, 2000-2010) Data analysis by GRDC funded National Statistics Group.
Table 2: Conmurra Wheat Variety Trial 2010 Sprayed replicated trial Single rep, unsprayed Variety Yield (kg/ha) % site mean kg/ha Stripe rust AGT-Scythe 5794 82 2278 6 Axe 5723 81 4056 2 Barham 5432 77 5371 5 Beaufort 8466 119 8547 1 Bogong 10280 145 8315 Mix 1-8 Bolac 8028 113 7843 1 Bowie 5774 81 2306 7 Brennan 6578 93 6732 1 Bullet 5501 78 1519 6 Catalina 5905 83 1926 5-6 Chara 7521 106 5584 5 CL-Janz 7059 99 4528 6 Correll 5842 82 2908 4 Derrimut 7663 108 1954 6 EGA-Gregory 7639 108 6213 1 EGA-Kidman 6190 87 3982 5 Einstein 8244 116 8371 1 Espada 7527 106 6982 4 Frame 5809 82 3297 6 Gascoigne 8615 121 7630 1 Gladius 7881 111 5815 4 Guardian 7851 111 5723 5-6 HRZ02.0014 7985 113 7890 3 HRZ03.0058 8548 120 6510 1 HRZ03.0065 7713 109 7501 3-4 HRZ03.0069 8102 114 7667 mix 4 HRZ03.0086 6418 90 6899 1 IGW3073 9222 130 8686 3 IGW3097 5818 82 1130 9 IGW3119 8151 115 6343 3-4 Janz 7428 105 3102 mix Krichauff 6734 95 1482 8 Lincoln 6748 95 7102 1 Mace 6835 96 3074 8 Mackellar 7476 105 6797 1 Magenta 7190 101 5176 mix 5/6 Peake 5788 82 3741 mix 4 Preston 9325 131 9047 1 Pugsley 6088 86 3065 8 Rudd 7171 101 7084 1 Sentinel 8794 124 8751 1 SQP-Revenue 7750 109 8547 1 Tennant 6335 89 6815 1 Wyalkatchem 7501 106 1537 7 Yenda 5208 73 824 9 Yitpi 5382 76 3769 4-5 Young 4662 66 2148 6 Site mean (kg/ha) 7100 CV% 8.195 lsd(0.05) 966.9 Disease Scale: 1 =R, 3 = MR, 5 = MS, 7 = S, 9= VS
WHEAT Table 3: Conmurra Wheat Variety Trial 2010, Grain Quality Variety 1000 grain wt Screenings Test Weight Protein AGT-Scythe 34.12 1.77 73.68 15.2 Axe 37.78 1.3 72.85 16.5 Barham 30.8 2.64 70.63 12.9 Beaufort 36.3 3.1 72.14 14.1 Bogong 43.36 2.01 70.76 12 Bolac 29.52 4.75 73.83 13.5 Bowie 34.26 1.8 69.12 12.9 Brennan 37.68 1.87 75.3 14.2 Bullet 34.46 1.44 73.87 15.3 Catalina 41.1 1.25 74.7 14.8 Chara 33.88 2.54 72.61 13.8 CL-Janz 39.92 1.32 75.2 14.3 Correll 36.66 3.34 71.94 14.2 Derrimut 32.3 2.21 74.78 13.9 EGA-Gregory 38.96 2.52 75.7 13.5 EGA-Kidman 36.66 2.16 75.39 14.2 Einstien 32.7 2.26 70.4 11 Espada 37.64 1.27 72.72 14.5 Frame 34.9 3.65 73.86 14.4 Gasgoigne 43.26 1.97 78.13 14.4 Gladius 38.18 2.67 72.34 15.4 Guardian 35.54 2.55 75.92 13.3 HRZ02.0014 42.66 1.03 76.22 13.8 HRZ03.0058 36.78 1.43 77.19 13.4 HRZ03.0065 32.62 5.64 74.24 13.9 HRZ03.0069 30.6 4.99 72.28 13.6 HRZ03.0086 34.14 3.21 74.2 14.2 IGW3073 39.58 1.88 77.22 12.7 IGW3097 47.62 0.33 73.02 17.5 IGW3119 44.7 1.23 76.78 14.1 Janz 33.18 3.9 74.81 14 Krichauff 33.8 2.01 72.51 14.2 Lincoln 41.82 0.77 76.68 13.1 Mace 39.46 1.56 75.65 14.5 MacKellar 33.38 4.83 73.07 12.7 Magenta 39.18 3.49 75.09 14.2 Peake 36.94 2.02 74.72 14.7 Preston 36.6 2.32 72.8 13.4 Puglsey 30.44 5.12 73.2 14.2 Rudd 35.96 1.07 72.16 13.1 Sentinel 42.2 1.78 73.85 13.1 SQP-Revenue 36.84 3 72.07 12.7 Tennant 42.22 0.57 71.46 13.4 Wyalkatchem 44.84 0.84 76.01 14.8 Yenda 25.18 8.4 67.13 14.2 Yitpi 36.54 3.78 73.72 13.5 Young 32.42 2.7 74.84 15.6
Table 4: Frances Wheat Variety Yield and Grain Quality Trial 2010 Variety Yield (kg/ha) % site mean 1000 grain wt Screenings Test Weight Protein IGW3073 6673 123 39.94 0.89 77.35 11.3 Preston 6636 122 38.14 1.17 74.51 12.1 IGW3119 6469 119 44.88 0.67 77.38 12 Bogong 6281 116 41.06 2.63 70.95 10.7 Derrimut 6226 115 34.22 0.68 77.35 11.7 Beaufort 6168 114 35.98 3.59 73.09 11.5 AGT-Scythe 6011 111 36.24 1.69 76.23 12 Guardian 6036 111 37.34 1 76.9 12 MacKellar 6025 111 33.88 4.15 75.42 10.9 Pugsley 5990 111 37.28 1.3 76.85 12 Bullet 5945 110 36.5 1.19 77.62 12.4 Young 5946 110 34.84 0.55 77.44 12.3 Chara 5864 108 34.76 1.09 75.14 12.1 CL-Janz 5853 108 38.9 0.13 76.2 12.5 Magenta 5799 107 39.22 1.69 76.89 12.5 Peake2 5816 107 37.3 1.05 76.66 12.1 Bolac 5755 106 30.52 1.67 74.8 12 SQP-Revenue 5751 106 35.88 2.71 74.83 11.3 Wyalkatchem 5729 106 46.48 0.12 77.41 14.3 Janz 5708 105 36.1 0.45 76.7 12.4 Rudd 5673 105 36.44 0.44 73.31 11.2 Mace 5585 103 43.06 0.86 77.44 12.9 Yenda 5559 103 33.44 1.19 73.86 11.6 Gasgoigne 5532 102 40.6 1.22 77.98 13 Peake1 5497 101 35.42 1.53 76.31 12.5 Krichauff 5387 99 34.74 0.78 76.53 13.5 Espada 5300 98 39.42 0.08 74.49 13.2 Lincoln 5329 98 39.76 1.09 77.14 12.4 Yitpi 5312 98 40.08 1.77 75.81 11.9 Excalibur 5200 96 37.74 1.32 74.86 13 Frame 5114 94 39.28 2.86 76.37 11.9 Catalina 4878 90 40.24 0.9 76.96 13.3 Axe 4700 87 40.06 0.03 75.05 14.1 Correll 4720 87 40.34 1.43 73.93 12.6 Gladius 4650 86 42.94 0.73 74.97 13.7 Sentinel 4612 85 41.96 0.41 74.54 12.5 Barham 4511 83 35.32 0.84 73.71 12 Brennan 4455 82 37.2 1.97 78.22 12.7 Bowie 4386 81 35.78 1.23 72.97 12.3 EGA-Gregory 4409 81 40.58 0.9 76.95 12.7 Tennant 4308 80 40.92 1.65 73.78 12 EGA-Kidman 4095 76 35.64 1.08 77.11 13.1 IGW3097 3201 59 50.32 0.1 75.33 17.9 Site mean (kg/ha) 5421 CV% 4.47 lsd(0.05) 408.7
WHEAT Table 5: Millicent 2010 Wheat Variety Yield and Grain Quality Trial: Variety Yield % site 1000 grain Test (kg/ha) mean wt Screenings Weight Protein IGW3119 8724 128 46.74 0.79 75.49 11.8 Sentinel 8705 127 47.34 0.6 75.21 12 SQP-Revenue 8342 122 42.32 3.04 72.17 10.7 Gasgoigne 8174 120 47.44 0.66 76.72 12.2 Lincoln 8228 120 47 1.19 76.93 11.5 Bogong (trit) 7979 117 49.62 0.61 71.44 10.8 HRZ03.0065 7945 116 35.48 1.71 74.65 10.9 IGW3073 7685 112 45.48 0.27 77.54 11.4 Beaufort 7506 110 38.76 1.85 70.63 11.4 Magenta 7545 110 44.76 1.6 75.06 12.3 Preston 7551 110 39.86 5.85 72.44 10.7 Bolac 7477 109 35.56 2.95 75.52 12.7 Espada 7436 109 46.14 0.6 73.79 13.2 HRZ02.0014 7466 109 45.32 0.7 76.91 12.3 HRZ03.0058 7287 107 38.16 0.73 76.72 12.2 Guardian 7237 106 39.36 2.27 76.06 12.1 HRZ03.0069 7227 106 38.22 2.98 73.52 11.8 MacKellar 7249 106 37.4 2.78 70.74 11.4 HRZ03.0086 7173 105 44.44 1.04 75.03 11.2 Einstein 7132 104 34.52 1.57 71.07 10.7 Rudd 7121 104 42.88 0.1 70.56 10.8 Axe 7042 103 47.7 8.04 73.87 13.5 Brennan 7021 103 43.66 0.72 75.52 12 HRZ06.2489 7035 103 38.26 1.06 77.67 12 Tennant 7043 103 44.98 1.21 71.54 11 Chara 6964 102 39.56 2.13 74.24 12.3 Frame 6942 102 45.5 1.65 75.62 11.8 HRZ06.2534 6952 102 49.36 0.36 76.58 11.2 Puglsey 6857 100 44.26 0.48 75.7 11.4 Barham 6668 98 41.9 0.2 73.06 11.4 Janz 6695 98 39.14 1.57 75.5 12.7 Correll 6532 96 47.52 1.36 73.37 12.6 Yitpi 6594 96 43.38 1.28 76.16 11.9 Young 6541 96 34.22 2.94 75.24 12.5 Bullet 6525 95 36.58 1.63 74.22 12.6 CL-Janz 6500 95 44.14 0.62 74.91 12.8 Derrimut 6442 94 36.98 0.5 74.36 12.5 Gladius 6368 93 46.64 1.07 74.02 12.9 Peake 6337 93 39.82 1.57 74.48 13.1 Catalina 6233 91 42.28 1.65 76.29 13.4 EGA-Gregory 6237 91 45.62 0.86 76.83 12.2 AGT-Scythe 6160 90 38.88 1.05 70.48 13.6 Excalibur 6135 90 44.28 2.21 72.46 12.8 Wyalkatchem 6165 90 41.94 1.23 72.56 13.9 HRZ06.2480 6056 89 40.66 0.6 75.93 11.7 Mace 6030 88 39.52 2.06 74.33 12.9 HRZ06.2551 5781 85 33.84 2.84 73.35 11.3 Krichauff 5032 74 34.4 1.85 71.98 13 Bowie 4971 73 39.26 1.28 69.92 11.9 Yenda 4954 72 30.6 4.21 68.4 12 IGW3097 4833 71 43.68 0.35 73.08 14.7 EGA-Kidman 4798 70 39.5 1.34 76.08 13.6 Site mean 6843 CV% 3.122 lsd(0.05) 474.9
Table 6: Rankings of Wheat Varieties in South East Trials 2007-2010 Variety Millicent Conmurra Frances 2007 2008 2009 2010 2007 2008 2009 2010 2007 2008 2009 2010 AGT-Scythe 17 13 14 42 49 17 27 38 25 11 14 8 Amarok 4 25 25 39 55 38 Annuello 14 28 34 9 3 8 Axe 50 20 41 22 56 15 28 41 29 5 31 33 Barham 40 30 19 43 22 36 Beaufort 10 2 10 1 6 46 5 5 Bolac 25 16 27 11 21 32 33 10 21 21 16 16 Bowie 42 48 11 40 18 39 Brennan 57 14 34 24 23 49 35 29 56 36 36 37 Bullett 12 34 10 42 2 11 Camm 18 3 37 38 18 28 28 Carinya 44 38 43 21 32 24 10 Catalina 28 40 15 34 17 31 Chara 6 46 5 25 18 13 7 19 10 9 23 12 Clearfield-Janz 19 12 30 35 39 31 24 25 33 29 4 13 Correll 31 24 32 33 29 51 20 35 30 31 39 32 Derrimut 35 1 17 36 27 29 18 16 8 13 4 EGA-Gregory 51 37 43 39 45 46 37 17 44 22 27 38 EGA-Wentworth 42 44 46 7 6 14 Einstein 19 7 Ellison 13 8 14 42 45 33 Espada 20 17 6 13 32 19 17 18 17 1 3 28 Excalibur 16 2 35 43 47 30 8 36 23 32 29 Frame 49 35 36 27 31 45 29 37 39 18 6 30 Frelon 3 18 9 24 49 35 23 Gascoigne 20 5 16 4 33 GBA-Ruby 53 4 46 30 33 25 22 12 26 GBA-Sapphire 39 15 44 25 13 26 Giles 15 26 15 28 12 7 Gladius 41 10 11 37 50 40 21 12 4 2 20 34 Guardian 45 34 21 16 8 5 22 13 2 6 11 6 H46 52 11 10 51 3 30 28 16 15 Janz 26 31 31 29 38 47 6 22 23 4 12 Krichauff 29 47 32 28 30 25 Kukri 46 19 33 53 27 27 Lincoln 38 4 12 27 9 26 Mace 45 26 21 MacKellar 11 30 9 15 2 1 38 21 48 37 38 7 Magenta 26 9 4 23 13 15 Peake 54 45 39 38 54 23 23 39 1 19 19 20 Preston 7 8 2 1 1 2 Pugsley 9 23 22 28 22 48 3 33 24 10 7 9 SQP-Revenue 1 6 3 2 6 27 5 14 53 29 17 Sentinel 8 42 18 3 16 52 34 3 31 25 34 35 Wyalkatchem 24 29 13 41 42 2 26 20 11 3 24 18 Yitpi 29 41 33 31 24 8 14 44 16 17 21 27 Young 34 22 19 32 35 26 13 46 19 20 25 10
WHEAT Comments on Wheat Varieties from performance in NVT trials across the State; Provided by Rob Wheeler (Leader, New Variety Agronomy, SARDI) Several new wheat varieties, including Scout, Mace and Estoc, all performed well in extensive field trials across South Australia during 2010. These varieties were among 28 commercial varieties tested at 25 SARDI managed, National Wheat Variety Trial (NVT) sites across South Australia in 2010. The trials, funded by GRDC, also tested a further 35 advanced lines from wheat breeding companies operating throughout Australia. Grassy weeds, severe wet weather at harvest and other factors producing variability led to the results from three sites, Kimba, Palmer and Keith being deemed to be unusable. However the remaining 23 sites produced good results and averaged 4.21 t/ha, 28 percent above the average 3.29 t/ha produced in 2009. Reflecting the above average seasonal conditions within regions, site yields ranged from 1.70 t/ha at Penong in Western Eyre Peninsula to a whopping, and record, 7.17 t/ha at Mintaro in the Mid North. Mild and wet spring conditions throughout much of SA last year, combined with relatively low disease levels, were ideal for medium to later maturing varieties to reach their potential; similar to the outcome in 2009 and providing a contrast to the dry seasons between 2006 and 2008. The leading, and recently released variety when averaged across all sites, was Scout, which also topped the 2009 trials. Scout averaged 3 percent and 8 percent respectively above the widely grown commercial varieties Wyalkatchem and Yitpi and 11 percent above Gladius. Another three recently released varieties, Mace, Estoc and AGT Katana, trailed Scout by only 3 to 5 percent respectively, with each vying for top positions depending upon district, associated disease and other pressures. The many, very early to mid-season varieties, which dominated trial results in the drier seasons, were unable to benefit from the wet spring conditions in many districts in 2010. Consequently, their yields averaged in the range of around equal, to 6 percent below Yitpi. These varieties included Espada, Lincoln, Correll, Derrimut, Axe, Gladius, Peake and Catalina in descending order. Despite 2010 trial grain yields being improved relative to the previous season, physical quality was more variable. Across all sites, average grain protein declined from 12.2 per cent in 2009 to 10.2 per cent in 2010. Average test weights were similar at 77.3 kg/hl, while screenings improved, declining from 3.7 per cent to 1.9 per cent. Wet weather during harvest, resulted in sprouting damage within many trials, particularly those in the Murray Mallee, enabling validation of the sprouting data generated in 2009. The top performing variety, Scout, developed by Longreach Plant Breeders excelled across most districts although dropping back at many Upper and Western Eyre Peninsula sites and others such as Pinnaroo, where yellow leaf spot prevailed. With midseason maturity, Scout is derived largely from Yitpi and has a similar level of susceptibility to yellow leaf spot but has very good grain size, sprouting tolerance, CCN resistance and is eligible for APW classification. Scout has good stem rust and leaf rust resistance and while rated moderately
susceptible to stripe rust, has adult plant resistance to slow rust development. Scout appears to have good yield potential but more evaluation across drier environments is pending. The second ranked variety within trials was Mace, which is mid-season maturing and derived from Wyalkatchem, the most widely grown variety in South Australia. Like Scout, Mace has only been widely evaluated in NVT for two years and has returned yields very similar to Wyalkatchem overall, with some improved performances in 2010 where yellow leaf spot was prevalent and more generally across Central, Upper and Western Eyre Peninsula. Mace has good resistance to yellow leaf spot, like Wyalkatchem and additionally has improved resistance to CCN, stem rust, black point and taller plant height coupled with eligibility for AH classification. Within 2009 and 2010 trials, Mace has shown good grain physical quality and good tolerance to sprouting, like Wyalkatchem. While stripe rust had little impact within 2010 NVT results, and was effectively controlled by spraying at several sites, growers are reminded that Mace is susceptible to very susceptible to stripe rust. Mace has a potential for large yield loss in stripe rust prone areas unless growers regularly monitor crops and are prepared to use fungicides in a preventative strategy commencing early in crop growth. Highly ranked in 2010 trials, the older and most widely grown variety in South Australia, Wyalkatchem, continues to rival newer varieties each season. Wyalkatchem again yielded well in most districts and particularly the Mid North but dropped back within Yorke Peninsula trials. Wyalkatchem is now well outclassed by newer varieties with improved disease resistance but it may remain an option for growers in drier districts and other less rust prone areas while seed of newer varieties is multiplied. Commercially released by AGT during spring last year, Estoc ranked fourth across all sites and just one percent below Mace and Wyalkatchem. Estoc was expected to perform well in the longer 2010 season, having a maturity just one to two days earlier than Yitpi and being related to Yitpi. Estoc yielded well across all districts and now across three seasons of NVT evaluation has averaged around five percent above Yitpi. Estoc is eligible for APW classification and has produced good physical grain quality combined with good sprouting tolerance, like Yitpi, during the past two seasons in SA. It has good resistance to all rusts and CCN and is slightly less susceptible to yellow leaf spot than Yitpi. These characteristics will provide SA growers with a widely adapted longer season variety option relative to the many early to mid-season varieties released in recent years. Averaging five and two percent above Yitpi in 2009 and 2010 respectively, another recent release, AGT Katana, closely followed the leaders, performing well in most districts but falling away in the Mid North and Mallee trials. Katana is a premium quality variety developed for specific export markets. Katana is derived from Kukri and Tammin, has good physical grain quality similar to Yitpi albeit with some susceptibility to sprouting. With modest disease resistance, Katana is rated as moderately susceptible to stem rust and leaf rust, susceptible to CCN but moderately resistant to moderately susceptible to both yellow leaf spot and stripe rust.
WHEAT Perhaps not surprisingly, the mid-season and early flowering varieties, Gladius and Axe, which have both dominated NVT results during drier seasons, performed modestly in 2010. Gladius widely diverged from it s related sister-line Espada throughout 2010 Eyre Peninsula NVT sites and averaged 3 percent below Yitpi across all sites while Espada was one percent above. Yellow leaf symptoms similar to Frame yellows, was seen on Gladius at many sites and may have contributed to the lower performance not seen in drier seasons. Over six years trialling, the differences between Espada and Gladius are mainly in receival classification, leaf rust resistance and black point resistance with Gladius perhaps more dominant in drier seasons and Espada in longer and wetter seasons. Both varieties are moderately susceptible to CCN and susceptible to very susceptible to sprouting. Consequently growers in districts at risk of pre-harvest rains are advised to avoid delaying harvest of these varieties. Many other early and mid-season maturing varieties which had generally equalled or outperformed Yitpi in drier seasons were understandably lower performing on average in 2010. These included Lincoln, Correll, Derrimut, Peake and Catalina but in each case their yield rankings correlated well with previous seasons. Lincoln and Correll again demonstrated a high susceptibility to sprouting at several sites with Correll also downgraded due to test weight below 74 kg/hl at 6 from 23 sites. This will have greater implication in the near future when the wheat receival test weight standards are raised to 76 kg/hl minimum. Of high interest within the 2010 NVT trials will be the performance of the two new imidazolinone tolerant varieties just recently released by AGT, namely Kord CL Plus and Justica CL Plus. Released as alternatives to Clearfield JNZ and Clearfield STL, their yields averaged from 4 percent below to 3 percent above Clearfield JNZ respectively. Possessing two genes for imadazolinone tolerance (rather than one, as is the case for Clearfield JNZ and STL) both of these lines have a much higher level of herbicide tolerance. Kord CL Plus is derived from Gladius with similar maturity and disease profile but featuring CCN resistance equal to Yitpi. This variety is visually very similar to Gladius, and is expected to perform very similarly. Justica CL Plus on the other hand has slightly later maturity being derived from both Spear and Gladius families and is moderately susceptible to CCN and stripe rust. Later maturity favoured Justica CL Plus in the 2010 season while in the longer term both varieties are expected to perform alike. Physical grain quality of Kord CL Plus was generally similar to Gladius within 2010 trials and sprouting tolerance is also expected to be similar. Based on 2010 NVT data, Justica CL Plus had slightly lower average test weights but has a higher level of sprouting tolerance. The quality classification of both varieties will be finalised in coming months, but this aside, these varieties offer many improvements over existing Clearfield wheat types. Conclusion and into the paddock Choose new wheat varieties based on several years and sites of data as many wheats have only been tested in recent years with poor spring conditions.
In the lower South East, Barley Yellow Dwarf Virus has had a major effect on some varieties and in future farmers should consider varieties with improved tolerance or else consider using chemical sprays to repel aphids that carry the disease. Acknowledgements Trials undertaken by the SARDI New Variety Agronomy group with comments about varieties by Rob Wheeler, SARDI Funded by GRDC