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Denomination: 'P25T51R'
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: Don Kyle, Pioneer Hi-Bred International, Inc., Princeton, 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: 2013-03-13
Application Number: 13-7965
Grant of Rights Date: 2016-04-25
Certificate Number: 5251
Date rights surrendered: 2018-04-25

Variety Description

Varieties used for comparison: '92Y75' and 'Thesan R2'

Summary: The pubescence on the middle third of the stem of 'P25T51' is light tawny whereas it is grey on 'Thesan R2'. When 50% of the pods are ripe, the plants of 'P25T51R' are shorter than those of the reference varieties. The pod colour for 'P25T51R' is light to medium brown whereas it is medium to dark brown for 'Thesan R2'. The seed shape of 'P25T51R' is spherical flattened whereas it is spherical for 'Thesan R2'. The hilum colour of 'P25T51R' is dark brown hilum whereas it is light brown on 'Thesan R2'. 'P25T51R' is earlier maturing than the references varieties.


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 in season

HYPOCOTYL: anthocyanin colouration absent

LEAF: pointed ovate lateral leaflet

FLOWER: white

POD: light to medium brown colour
SEED: spherical flattened, yellow ground colour of testa, 17.8 grams per 100 seed at 13-15 % moisture
HILUM: dark brown, yellow funicle

AGRONOMICS: 3150 heat unit rating

QUALITY CHARACTERISTICS: 40.6 % protein, 22.8 % oil

Origin & Breeding History: 'P25T51R' (experimental designations 'XB26W12' and 'PH12208') is the result of the cross between '92M54' and 'EX24P05' made in 2005 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 and the F3 generation was grown in Viluco, Chile. The F4-F7 generations were grown in Princeton, Illinois, USA and advanced based on yield for single plants and progeny rows. Single plant purification took place in 2009 in Princeton, Illinois. Wide area testing continued from 2010-2012 in the USA and Canada. Selection criteria included yield, maturity and resistance to Phytophthora rot (Phytophthora megasperma f. sp. glycinea) and soybean cyst nematodes (Heterodera glycines).

Tests & Trials: The comparative trial for 'P25T51R' conducted near Chatham, Ontario during the 2013 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 with a row spacing of 76 cm. Each plot was sown with 300 seeds per replication. For each variety, the plant height was based on 30 measurements whereas the seed weight was based on 3 measurements. Mean differences were significant at the 5% probability level based on LSD values. Results were supported by the official technical examination report 201200214, purchased from the Plant Variety Protection Office, Beltsville, Maryland, USA.

Comparison tables for 'P25T51R' with reference varieties '92Y75' and 'Thesan R2'

Plant height(cm)

  'P25T51R' '92Y75' 'Thesan R2'
mean (LSD=2.02) 66.5 73.4 86.3
std. deviation 3.2 3.5 5.4

Maturity Date (days)

  'P25T51R' '92Y75' 'Thesan R2'
mean 127.0 132.0 130.3

Click on image for larger view
Soybean: 'P25T51' (center) with reference varieties '92Y75' (left) and 'Thesan R2' (right)

Click on image for larger view
Soybean: 'P25T51' (bottom) with reference varieties '92Y75' (top left) and 'Thesan R2' (top right)

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