Hulk R2X
| Denomination: | 'Hulk R2X' |
|---|---|
| Previously Proposed Denomination: | 'C4M22469 XT' |
| Botanical Name: | Glycine max |
| Applicant/Holder: |
Sollio Agriculture 19235, avenue Saint-Louis Saint-Hyacinthe, Quebec J2T 5J4 Canada |
| Breeder: |
Jérôme Auclair, Sollio Agriculture, Saint-Hyacinthe, Quebec |
| Application Date: | 2024-03-27 |
| Provisional Protection: | 2024-03-27 |
| Application Number: | 24-11636 |
Variety Description
Varieties used for comparison: 'Jaguar R2X' and 'Stingray R2X'
Summary: When the cotyledons are completely open, the intensity of anthocyanin colouration on the hypocotyl of 'Hulk R2X' is strong whereas it is of medium intensity for ‘Jaguar R2X'. When 50% of the flowers are open, the branch attitude of 'Hulk R2X' is semi-erect whereas it is erect to semi-erect for the reference varieties. When 50% of the pods are ripe, the hairs on the middle third of the stem of 'Hulk R2X' are tawny whereas they are light tawny for ‘Stingray R2X'. When 95% of the pods are ripe, the plants of 'Hulk R2X' are taller than the plants of ‘Stingray R2X'. The plants of ‘Hulk R2X' mature earlier than the plants of ‘Stingray R2X'.
Description:
HYPOCOTYL: strong intensity of anthocyanin colouration
PLANT: oilseed type, indeterminate growth type, semi-erect branch attitude, tawny pubescence on middle third of main stem, begins flowering early season, matures early season
LEAF: pointed ovate lateral leaflet, medium green colour
FLOWER: violet
POD: medium intensity of brown
SEED: medium size, spherical flattened, yellow ground colour of testa
HILUM: black
Origin & Breeding History: 'Hulk R2X' (experimental designations C4M22469 XT and D1903-6) originated from a cross conducted between ‘Akras' and ‘C411XK549.K03.K015' in 2013 in Saint-Hyacinthe, Quebec, Canada. The modified single seed descent method was used to develop the variety. In 2013, F1-F4 generations were grown in Santa Isabel, Puerto Rico and further advanced. In 2015, the F5 generation was grown in Saint-Hyacinthe, Quebec and individual plants were selected based on a visual assessment of maturity, lodging resistance and yield. From 2015 to 2021, 'Hulk R2X' was tested in replicated field trials. Breeder seed was established at the F9 generation in 2012 in Saint-Hyacinthe, Quebec.
Tests & Trials: The comparative trials for ‘Hulk R2X' were conducted at the crop production research farm of Sollio Agriculture in Saint-Hyacinthe, Quebec, during the 2024 and 2025 growing seasons. The trials were planted in an RCB design with 4 replicates per variety. Each 5 square metre plot consisted of 3 rows, each 4.5 metres long, with a row spacing of 0.38 metres. The seeding density resulted in a total of 40 plants per variety per square metre for a total of 800 plants per variety per year. For each variety, 20 measurements were taken to determine plant height. Mean differences are significant at the 5% probability level based on a Tukey test.
Comparison tables for 'Hulk R2X' with reference varieties 'Jaguar R2X' and 'Stingray R2X'
Plant height (cm)
| 'Hulk R2X' | 'Jaguar R2X' | 'Stingray R2X' | |
|---|---|---|---|
| mean 2024 | 77.0 | 76.2 | 72.5 |
| std. deviation 2024 | 2.8 | 3.3 | 3.3 |
| mean 2025 | 104.3 | 91.8 | 97.8 |
| std. deviation 2025 | 4.2 | 3.0 | 2.9 |
Maturity date (number of days from planting to maturity)
| 'Hulk R2X' | 'Jaguar R2X' | 'Stingray R2X' | |
|---|---|---|---|
| mean 2024 | 111 | 110 | 114 |
| mean 2025 | 112 | 113 | 121 |
Click on image for larger view
Soybean: ‘Hulk R2X' (left) with reference varieties ‘Jaguar R2X' (centre) and ‘Stingray R2X' (right)
Click on image for larger view
Soybean: ‘Hulk R2X' (left) with reference varieties ‘Jaguar R2X' (centre) and ‘Stingray R2X' (right)
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