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Denomination: '92Y31'
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: Kari Greason, Pioneer Hi-Bred Limited, Chatham, Ontario
Agent in Canada: Pioneer Hi-Bred Production LP
379 Springbank Ave.
P.O. Box 23040
Woodstock, Ontario
N4T 1R9
Tel: 519-533-5151
Application Date: 2009-03-13
Application Number: 09-6523
Grant of Rights Date: 2011-12-28
Certificate Number: 4250
Date rights revoked: 2013-12-28

Variety Description

Varieties used for comparison: 'HS22R60' and 'S21-N6'

Summary: '92Y31' has light tawny hairs on middle third of main stem while 'HS22R60' has brown hairs. Plants of '92Y31' are taller than those of the reference varieties. '92Y31' has a spherical rounded seed shape while it is spherical flattened in the reference varieties. The hilum of '92Y31' is grey while it is buff in 'S21-N6'. '92Y31' matures earlier than 'S21-N6'.


HYPOCOTYL: anthocyanin colouration present, strong intensity of anthocyanin colouration
PLANT: indeterminate growth type, semi-erect growth habit, light tawny colour of hairs on middle third of main stem
LEAF: medium green, pointed ovate lateral leaflet, medium blistering

FLOWER: purple

POD: brown
SEED: spherical rounded, medium size, dull coat lustre, yellow ground colour of testa, grey hilum, medium size hilum, normal abscission layer of hilum

AGRONOMY: 2.3 group maturity, 3075 heat unit rating, good resistance to lodging

DISEASE REACTION: resistant to Phytophthora rot (Phytophthora megasperma F. sp. glycinea)
QUALITY: 41.5% protein, 18.7% oil, high seed coat peroxidase acitvity

Origin & Breeding History: '92Y31' (experimental designations 'PH08204' and 'XB23Q08') was derived from the cross NKX022/D08006 made in 2000 in Puerto Rico. '92Y31' is an F5-derived line which was advanced to the F5 generation by modified single-seed descent. The F5:F6 progeny row was grown in a plant row yield trial in Ontario in the summer of 2003. Subsequently, it has undergone 5 years of extensive testing and purification. It has been assigned a commercial number based on yield, Brown Stem Rot tolerance, Phytophthora resistance, and resistance to Roundup branded herbicides. In the summer of 2006, the purification block of 72 rows was grown in Ontario. In the winter of 2006/2007, 0.50 acre increase was grown in Chile. In the summer of 2007, 20 acres of parent seed stock were grown. In the summer of 2008, 302 acres of seed stock and production seed were grown.

Tests & Trials: Tests and Trials were conducted during the summer of 2009 in Ridgetown, Ontario. Plots consisted of 2 rows with a row length of 5m and a row spacing of 76 cm. There were 3 replicates. Results were supported by the official technical examnimation report 200900143 purchased from the Plant Variety Protection Office in the USA.

Comparison tables for '92Y31' with reference varieties 'HS22R60' and 'S21-N6'

Plant height (cm)

  '92Y31' 'HS22R60' 'S21-N6'
mean 69 65 62
standard deviation 1.62 2.41 1.63

Maturity date

  '92Y31' 'HS22R60' 'S21-N6'
days 118 117 120

Click on image for larger view
Soybean: '92Y31' (centre) with reference varieties 'S21-N6' (left) and 'HS22R60' (right)

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