P33T72R

Soybean

Variety Description

Varieties used for comparison: 'XB32T13' and 'S31-L7'

Summary: When 95% of the pods are ripe, the middle third of the stem of 'P33T72R' has light tawny pubescence while that 'S31-L7' has grey pubescence. The plants of 'P33T72R' mature later than both reference varieties. The seed of 'P33T72R' is spherical flattened while that of 'S31-L7' is spherical. The hilum of 'P33T72R' is black while that of 'S31-L7' is imperfect black.

Description:

PLANT: oilseed type, indeterminate growth type, erect to semi-erect growth habit, light tawny pubescence on middle third of main stem, flowers and matures late to very late

HYPOCOTYL: strong intensity of anthocyanin colouration

LEAF: pointed ovate lateral leaflet, medium sized lateral leaflet

FLOWER: violet

POD: medium to dark brown colour
SEED: medium size, spherical flattened shape, yellow ground colour of testa
HILUM: black, normal abscission layer, yellow funicle

Origin & Breeding History: 'P33T72R' (experimental designation XB32AJ13) is the result of the cross between '93M61' and '93Y02' conducted in 2006 in the fall/winter in Viluco, Chile. The modified single seed descent method and pedigree method were used to develop the variety. The F1-F2 generations were grown in Salinas, Puerto Rico, the F3 generation was grown in Viluco, Chile and then advanced based on yield for single plants and progeny rows. Single plant purification took place in 2010 in Viluco, Chile. Wide area testing continued from 2011-2013 in the USA and Canada. Selection criteria included yield, maturity and resistance to Roundup branded herbicides, Phytophthora rot (Phytophthora sojae), Soybean cyst nematode (Heterodera glycines) and Frogeye leaf spot (Cercospora sojina).

Tests & Trials: The comparative trial for 'P33T72R' conducted in Wallaceburg, Ontario during the 2014 growing season was planted in a RCB design and consisted of 3 replicates for each variety. Plots consisted of 2 rows 4 metres in length and a row spacing of 76 cm. Each plot was sown with 275 seeds per replication. For each variety, the plant height was based on 30 measurements. Mean differences were significant at the 5% probability level based on LSD values. Results were supported by the official technical examination report 201300235, purchased from the Plant Variety Protection Office, Beltsville, Maryland, USA.

Comparison table for 'P33T72R' with reference varieties 'XB32T13' and 'S31-L7'

Days to maturity

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Soybean: 'P33T72R' (centre) with reference varieties 'XB32T13' (left) and 'S31-L7' (right)

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Soybean: 'P33T72R' (centre) with reference varieties 'XB32T13' (left) and 'S31-L7' (right)