Kultana R2

Soybean

Variety Description

Varieties used for comparison: 'Ajok R2', 'Maxo R2' and 'RR2 Titanium'

Summary: The hairs on the main stem of 'Kultana R2' are grey whereas they are tawny on 'RR2 Titanium'. When 50% of the pods are ripe, the plants of 'Kultana R2' are taller than those of the reference varieties. The colour of the hilum of 'Kultana R2' is light brown whereas it is dark brown on 'Maxo R2', imperfect black on 'Ajok R2' and black on 'RR2 Titanium'. 'Kultana R2' has a small seed whereas the seed is medium sized for 'Ajok R2' and 'Maxo R2'. The plants of 'Kultana R2' are earlier maturing than those of 'RR2 Titanium'.

Description:

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

HYPOCOTYL: very weak to medium intensity of anthocyanin colouration

LEAF: light to medium green colour, medium degree of blistering, pointed ovate lateral leaflet, small to medium sized lateral leaflet

FLOWER: violet

POD: light intensity of brown colour
SEED: small, spherical flattened shape, yellow ground colour of testa
HILUM: light brown, yellow funicle

Origin & Breeding History: 'Kultana R2' (experimental designation C4M15025 R2) is the result of a cross between proprietary selections conducted in 2008 at La Coop fédérée, in Saint-Hyacinthe, Quebec. A modified single seed descent method was used to develop the variety. In 2010 and 2011, the F1-F4 generations were grown in Santa Isabel, Puerto Rico. In 2012, plants from the F5 generation, grown in Saint-Hyacinthe, Quebec, were selected based on a visual assessment of lodging resistance, the number of pods per plant, and early maturation. The selected line was compared with the other sister lines within the recombinant family, which were derived from single seed descent. From 2013 to 2017, 'Kultana R2' was tested in the public trials of the Réseau Grandes Cultures du Québec and the Ontario Oil and Protein Seed Crop Committee.

Tests & Trials: The comparative trials for 'Kultana R2' were conducted during the 2016 and 2017 growing seasons in field site Techno 5 at La Coop fédérée, in Saint-Hyacinthe, Quebec. Each trial consisted of 3 replications per variety distributed in a RCB design. Each replicate consisted of four 5 metre long rows spaced 0.38 metres apart. The seeding density was such that it resulted in a total of over 750 plants per variety for each trial. For each variety, the plant height was based on 20 measurements in 2016 and 30 measurements in 2017. Mean differences were significant at the 5% probability level based on LSD values.

Comparison tables for 'Kultana R2' with reference varieties 'Ajok R2', 'Maxo R2' and 'RR2 Titanium'

Plant height (cm)

Days to maturity

Click on image for larger view

Soybean: 'Kultana R2' (left) with reference varieties 'Ajok R2' (centre left), 'RR2 Titanium' (centre right) and 'Maxo R2' (right)