Soybean growers in Saskatchewan are faced with expanding options of soybean varieties to choose from. Soybean variety selection is one of the most important factors in obtaining a high yielding crop and in reducing the risk of environmental loss of yield as a result of the growing season. Soybean varieties may have strengths that make them more suitable for some environments and less suitable for others. In Saskatchewan, soybean maturity is one of the most important factors to consider when selecting the right variety. Additional factors to consider include yield potential as well as disease resistance.
If risk of frost is a concern, select one of the earliest maturing varieties available. Soybeans are scored based on maturity groups. Soybeans are assigned to these maturity groups based on relative maturity of comparative varieties. Based on the maturity group rating scale, different companies may have slightly different maturity group ratings from others for soybeans of a similar maturity. It is important for growers to understand what varieties have performed well in their area, and how the maturity of those varieties compare to other varieties in the marketplace.
Maturity is affected by growing conditions. Maturity group values assigned to a variety represent a guide based on average conditions providing a relative comparison for crops and varieties that are grown under similar conditions and planted at the same time. As maturity is delayed into the fall, differences in maturity can be heightened, as the days are shorter and temperatures are cooler. Under warm, dry years, maturity may be shortened and under cool, wet years, longer days-to-maturity could be expected.
Understanding Soybean Maturity Ratings
The maturity group (MG) rating system classifies soybean varieties from MG 000 in northern areas, to MG IX in southern areas of North America, based on latitude ranges and photoperiod (daylight) sensitivity. Each MG region covers one or two degrees of latitude, or about 200-300 kilometres from north to south. For Saskatchewan, soybeans are most suited with 00 and 000 MG. Each MG can have subgroupings with a 0 to 9 decimal number following the group number and these decimal places equate to slight increases in maturity. In the 00 maturity ratings, a subgroup of 00.1 would be earlier maturing than 00.9. These MG ratings are assigned by the respective company based on comparison to current commercial varieties and as a result, not all MG ratings are entirely standardized between seed companies.
Soybean Varieties Available for Production in Saskatchewan
The chart below indicates varieties that are suitable for production in Saskatchewan. A range of maturities are shown in this product listing. Please be aware that not all varieties shown will be suitable for all regions of Saskatchewan. Additional information on each variety can be found on the corresponding company website. Varieties are listed in order of increasing maturity for each supplier.
|Brett Young/Elite Seeds||Nacoma R2 (NEW)
|DKB003-29 (NEW) *limited|
|DuPont Pioneer||P0007A43R (NEW)|
|Legend Seeds||LSTR17XT (NEW)|
|NorthStar Genetics||NSC Leroy RR2Y|
|NSC Watson RR2Y|
|NSC Star City RR2X|
|NSC Reston RR2Y|
|NSC Austin RR2Y|
|NSC Gladstone RR2Y|
|NSC Starbuck RR2X|
|PRIDE Seeds||PS 00095 R2|
|PS 0035 NR2|
|PS 0044 XRN (NEW)
PS 0055 R2
|PS 0074 R2|
|Proven Seed||PV 11s001 RR2 (NEW)
PV 10s005 RR2
PV 12s007 R2X (NEW)
|Quarry Seed||Dario R2X|
|SeCan||Barron R2X (NEW)|
|Mahony R2 (NEW)|
|Thunder Seeds||TH 87000 R2YX|
|TH 87003 R2YX|
|TH 33003 R2Y|
|TH 37004 R2Y|
|TH 32004 R2Y|
|TH 88005 R2X (NEW)|
|TH 33005 R2Y|
|*Information provided is current as of December 2017.|
Soybean variety performance is evaluated at multiple locations in Saskatchewan annually in small plot soybean variety trials. These are all small plot trials contracted to research locations to execute the trials. The purpose is to provide growers and agronomists with information on yield and agronomic characteristics of the soybean varieties included in the trials. The information is summarized to help select the best variety options suited to each growing region. In 2017 Saskatchewan Pulse Growers coordinated the Saskatchewan trials. Results are presented in the chart below.
Mean yield of the check variety TH 33003R2Y was 46 bu/ac in 2017, 44 bu/ac in 2016, and 51 bu/ac in 2015. Typical on-farm yields are 25-30 bu/ac. Soybeans in the small plot variety trials were inoculated with soybean inoculant that contained Bradyrhizobium japonium.