Lion R2X

Soybean

Variety Description

Varieties used for comparison: 'BY Rundle XT', 'Stingray R2X' and 'Renuka R2X'

Summary: The intensity of anthocyanin colouration on the hypocotyl of 'Lion R2X' is medium whereas it is strong for that of 'Stingray R2X'. On the middle third of the main stem, the pubescence of 'Lion R2X' is tawny whereas it is light tawny for 'Renuka R2X'. The lateral leaflet of 'Lion R2X' is large while that of 'BY Rundle XT' and 'Stingray R2X' are medium sized and that of 'Renuka R2X' is small. The intensity of brown colour on the pod of 'Lion R2X' is light whereas it is medium for that of 'BY Rundle XT' and 'Renuka R2X'. The seed of 'Lion R2X' is medium sized while that of 'BY Rundle XT' is large and that of 'Renuka R2X' is small. The hilum on the seed of 'Lion R2X' is imperfect yellow whereas it is black for 'BY Rundle XT' and 'Stingray R2X' and dark brown for 'Renuka R2X'. The plants of 'Lion R2X' mature later than those of the reference varieties.

Description:

PLANT: oilseed type, indeterminate growth type, semi-erect branch attitude, tawny pubescence on middle third of main stem, begins flowering late season, matures late season

HYPOCOTYL: medium intensity of anthocyanin colouration

LEAF: large pointed ovate lateral leaflet, medium green

FLOWER: violet

POD: light brown

SEED: medium sized, spherical, light yellow ground colour of testa
HILUM: imperfect yellow

REACTION TO PHOTOPERIOD: very sensitive

Origin & Breeding History: 'Lion R2X' (experimental designations C4M19349 XT and D1704-5) originated from a cross between 'CS084.004.20.2' and 'AG2002-T3BAH' conducted in the summer of 2012 in Saint-Hyacinthe, Quebec. A modified single seed descent method was used to develop the variety. From 2012 to 2014, the F1 to F4 generation were grown in a nursery in Puerto Rico. In 2015, 'Lion R2X' was identified as a single plant at the F5 generation in Saint-Hyacinthe, Quebec. The selection criteria were based on a visual assessment of resistance to lodging, maturity date and yield. The variety was further tested in trials from 2015 to 2021. In 2020, 18 lines were selected and bulked to produce the breeder seed.

Tests & Trials: The comparative trials for 'Lion R2X' were conducted at the Coop fédérée Research Farm in Saint-Hyacinthe, Quebec in 2022 and 2023. The 5 square metre plot trials were planted in a RCB design with 4 replicates per variety and each row measuring 4.5 metres long. In 2022, the plot consisted of 3 rows with a row spacing of 0.5 metres while in 2023, the plot consisted of 4 rows with a row spacing of 0.36 metres. The seeding density was such that it resulted in a total of 40 plants per variety per square metre. For each variety, the plant height was based on 20 measurements per year. Mean differences were significant at the 5% probability level based on a Tukey test.

Comparison table for 'Lion R2X' with reference varieties 'BY Rundle XT', 'Stingray R2X' and 'Renuka R2X'

Time of maturity (number of days from planting to maturity)

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Soybean: 'Lion R2X' (middle right) with reference varieties 'BY Rundle XT' (right), 'Stingray R2X' (middle left) and 'Renuka R2X' (left)

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Soybean: 'Lion R2X' (bottom left) with reference varieties 'BY Rundle XT' (top left), 'Stingray R2X' (bottom right) and 'Renuka R2X' (top right)

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Soybean: 'Lion R2X' (bottom right) with reference varieties 'BY Rundle XT' (top right), 'Stingray R2X' (top left) and 'Renuka R2X' (bottom left)