Jaguar R2X

Soybean

Variety Description

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

Summary: The intensity of anthocyanin colouration on the hypocotyl of 'Jaguar R2X' is medium whereas it is strong for that of 'Stingray R2X'. When 95% of the pods are ripe, the plants of 'Jaguar R2X' are taller than those of 'BY Rundle XT'. The intensity of brown colour on the pod of 'Jaguar R2X' is medium whereas it is light for that of 'Stingray R2X'. The seed of 'Jaguar R2X' is small while that of 'BY Rundle XT' is medium sized. The plants of 'Jaguar R2X' mature later than those of 'BY Rundle XT' and earlier than those of 'Stingray R2X'.

Description:

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

HYPOCOTYL: medium intensity of anthocyanin colouration

LEAF: medium sized pointed ovate lateral leaflet, medium green

FLOWER: violet

POD: medium brown

SEED: small, spherical flattened, light yellow ground colour of testa
HILUM: black

REACTION TO PHOTOPERIOD: very sensitive

Origin & Breeding History: 'Jaguar R2X' (experimental designations C4M19346 XT and D1702-2) originated from a cross between 'Hydra R2' 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 the F4 generation were grown in a nursery in Puerto Rico. In 2015, 'Jaguar R2X' was identified as a single plant based on early maturity at the F5 generation in Saint-Hyacinthe, Quebec. The selection criteria were based on a visual assessment of lodging resistance, maturity date and yield. The variety was further multiplied in plots trials from 2015 to 2021. The variety was further tested in trials from 2015 to 2021. In 2020, 24 lines were selected and bulked to produce the breeder seed.

Tests & Trials: The comparative trials for 'Jaguar R2X' were conducted at Sollio Agriculture 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 tables for 'Jaguar R2X' with reference varieties 'BY Rundle XT' and 'Stingray R2X'

Plant height (when 95% of the pods are ripe) (cm)

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

Click on image for larger view

Soybean: 'Jaguar R2X' (centre) with reference varieties 'BY Rundle XT' (right) and 'Stingray R2X' (left)

Click on image for larger view

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