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Denomination: 'P28T62R'
Botanical Name: Glycine max
Applicant/Holder: Pioneer Hi-Bred International, Inc.
8305 NW 62nd Avenue
P.O. Box 7060
Johnston, Iowa
United States of America
Breeder: Randy L. Kallem, Pioneer Hi-Bred International, Inc., Dallas Centre, United States of America
Cat Salois, Pioneer Hi-Bred International, Inc., Napoleon, United States of America
Agent in Canada: Pioneer Hi-Bred Production Co.
24th Floor, 215 2nd Street SW
Calgary, Alberta
T2P 1M4
Tel: 403-440-2988
Application Date: 2016-09-13
Provisional Protection:: 2016-09-13
Application Number: 16-9007
Grant of Rights Date: 2019-02-28
Certificate Number: 5949
Grant of Rights Termination Date: 2039-02-28

Variety Description

Varieties used for comparison: 'P26T76R' and 'S32-L8'

Summary: The hypocotyl of 'P28T62R' has no anthocyanin colouration whereas that of 'P26T76R' has anthocyanin colouration. The flower colour of 'P28T62R' is white whereas it is violet for 'P26T76R'. The colour of the hilum on 'P28T62R' is medium brown whereas it is black on 'P26T76R'. 'P28T62R' matures earlier than 'S32-L8' and matures later than 'P26T76R'.


PLANT: indeterminate growth type, light tawny pubescence on middle third of main stem, begins flowering and matures early to mid-season

HYPOCOTYL: anthocyanin colouration absent

LEAF: pointed ovate lateral leaflet

FLOWER: white

SEED: yellow ground colour of testa
HILUM: medium brown

Origin & Breeding History: 'P28T62R' (experimental designation XB28AB15R) is the result of the cross between proprietary selections conducted in 2009 near Salinas, Puerto Rico. The modified single seed descent method and pedigree method were used to develop the variety. The F1 and F2 generations were grown near Salinas, Puerto Rico followed by single F3 plant selections made near Viluco, Chile in 2010. In 2011, single F4 plant selections were made near Napoleon, Ohio, USA followed by a progeny row yield test near Viluco, Chile. In 2012, single plant purification took place in Napoleon, Ohio along with regional area yield tests. Individual plant rows were harvested and advanced near Viluco, Chile and then, bulked near Napoleon, Ohio and Salinas, Puerto Rico in 2013. Wide area testing continued from 2013-2014 in the USA and Canada. Selection criteria included yield, maturity and resistance to Roundup branded herbicides and to Phytophthora rot (Phytophthora megasperma f. sp. glycinea).

Tests & Trials: The comparative trial for 'P28T62R', conducted in Chatham, Ontario, Canada during the 2016 growing season, was planted in a RCB design and consisted of 3 replicates for each variety. Plots consisted of 2 rows 4.5 metres in length and a row spacing of 76 cm. For each variety, the plant height was based on 30 measurements whereas the seed weight was based on 3 measurements. Results were supported by the official technical examination report 201600106, purchased from the Plant Variety Protection Office, Beltsville, Maryland, USA.

Comparison table for 'P28T62R' with reference varieties 'P26T76R' and 'S32-L8'

Days to maturity

  'P28T62R' 'P26T76R' 'S32-L8'
mean 128 125 130

Click on image for larger view
Soybean: 'P28T62R' (centre) with reference varieties 'P26T76R' (left) and 'S32-L8' (right)

Click on image for larger view
Soybean: 'P28T62R' (centre) with reference varieties 'P26T76R' (left) and 'S32-L8' (right)

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