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Denomination: 'P25A65R'
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: Jordan Spear, Pioneer Hi-Bred International, Inc., Algona, 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: 2017-06-16
Provisional Protection:: 2017-06-16
Application Number: 17-9249
Grant of Rights Date: 2019-12-23
Certificate Number: 6119
Grant of Rights Termination Date: 2039-12-23

Variety Description

Varieties used for comparison: '92Y55' and 'P25T51R'

Summary: When 95% of the pods are ripe, the plants of 'P25A65R' are shorter than the plants of '92Y55'. The pod colour for 'P25A65R' is medium brown whereas it is light brown for 'P25T51R'. The colour of the hilum on 'P25A65R' is medium brown whereas it is black on '92Y55'. 'P25A65R' matures earlier than '92Y55'.


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

HYPOCOTYL: anthocyanin colouration absent

LEAF: pointed ovate lateral leaflet

FLOWER: white

POD: medium brown
SEED: yellow ground colour of testa
HILUM: medium brown

Origin & Breeding History: 'P25A65R' is the result of the cross between propriety selections conducted in 2011 in North Platte, Nebraska, USA. The modified single seed descent and pedigree methods of plant breeding were used to develop the variety. The F1 generation, grown near Salinas, Puerto Rico, was harvested in bulk and the F2 generation was grown near Salinas, Puerto Rico in 2012. In 2012, single F3 plant selections were made near Cedar Falls, Iowa, USA followed by a progeny row yield test near Viluco, Chile in 2012. In 2013, regional yield tests were done in Cedar Falls, Iowa. Single plant purification took place in 2013 in Viluco, Chile with individual plant rows harvested and advanced. Wide area testing continued from 2014 to 2016 in the USA and Canada. Selection criteria included yield, maturity and resistance to glyphosate herbicides and to Phytophthora rot (Phytophthora megasperma f. sp. glycinea).

Tests & Trials: The comparative trial for 'P25A65R' conducted in Chatham, Ontario during the 2017 growing season was planted in a RCB design and consisted of 3 replicates for each variety. Plots consisted of 2 rows, each 4.5 metres in length with a row spacing of 76 cm. Each plot was sown with approximately 280 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 201700259, purchased from the Plant Variety Protection Office in Beltsville, Maryland, USA.

Comparison tables for 'P25A65R' with reference varieties '92Y55' and 'P25T51R'

Plant height (cm)

  'P25A65R' '92Y55' 'P25T51R'
mean (LSD=3.7) 94.8 101.2 97.3
std. deviation 1.8 1.5 2.3

Days to maturity

  'P25A65R' '92Y55' 'P25T51R'
mean 123 125 122

Click on image for larger view
Soybean: 'P25A65R' (centre) with reference varieties '92Y55'
(left) and 'P25T51R' (right)

Click on image for larger view
Soybean: 'P25A65R' (centre) with reference varieties '92Y55'
(left) and 'P25T51R' (right)

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