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Denomination: '92Y55'
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: John Van Herk, Pioneer Hi-Bred Production LP, Woodstock, Ontario
Agent in Canada: Pioneer Hi-Bred Production Co.
24th Floor, 215 2nd Street SW
Calgary, Alberta
T2P 1M4
Tel: 403-440-2988
Application Date: 2012-01-26
Application Number: 12-7488
Grant of Rights Date: 2015-11-18
Certificate Number: 5145
Date rights surrendered: 2019-11-18

Variety Description

Varieties used for comparison: 'ThesanR2' and '92Y83'

Summary: '92Y55’ flowers earlier than the reference varieties. The plants of '92Y55’ have a light tawny pubescence whereas those of 'ThesanR2’ have a grey pubescence. When 50 % of the pods are ripe, the plants of '92Y55’ are shorter than those of '92Y83’. '92Y55’ has a brown pod colour whereas it is tan for '92Y83’. The seed shape of '92Y55’ is elongate whereas it is spherical flattened for the reference varieties. The hilum of '92Y55’ is black and is medium to large in size whereas it is light brown and small to medium in size for 'ThesanR2’. '92Y55’ matures earlier than '92Y83’.


PLANT: oilseed type, indeterminate growth type, semi-erect growth habit, light tawny pubescence on middle third of main stem

HYPOCOTYL: anthocyanin colouration absent

LEAF: medium green colour, pointed ovate lateral leaflet

FLOWER: white

POD: brown
SEED: elongate, dull lustre, yellow ground colour of testa, 15.5 grams per 100 seed at 13 % moisture
HILUM: black, medium to large, normal abscission layer

AGRONOMICS: 3150 heat unit rating

QUALITY CHARACTERISTICS: 40.1 % protein, 21.9 % oil

Origin & Breeding History: '92Y55’ (experimental designations XB25Q11, PH11203) is the result of a cross made in 2003 between '92M91’ and '92M40’ in Chile. The modified single seed descent method and pedigree method were used to develop the variety. The F1-F2 generations were grown in Puerto Rico. The F3 was grown in Canada and the F4 in Chili. The F5 generation onward were grown in Canada and advanced based on yield for single plants and progeny rows. Single plant purification occurred in 2008 in Chili. Wide area testing continued from 2009-2011 in the USA and Canada. Selection criteria included yield, maturity and resistance to Roundup branded herbicides, Phytophthora rot (Phytophthora megasperma f. sp. glycinea), soybean cyst nematode (Heterodera glycines) and Frogeye leaf spot (Cercospora sojina).

Tests & Trials: Test and trials for '92Y55’ were conducted in Ridgetown, Ontario during the 2012 growing season. Plots consisted of 2 rows with a row length of 4 metres and a row spacing of 76 cm. Each plot was sown with approximately 225 seeds. There were 3 replications per variety arranged in a RCB design. The measured characteristics were based on 30 measurements per variety. Mean differences were significant at the 5% probability level based on LSD values. Results were supported by the official technical examination report 201100192, purchased from the Plant Variety Protection Office, Beltsville, Maryland, USA.

Comparison tables for '92Y55' with reference varieties 'ThesanR2' and '92Y83'

Flowering Date (days)

  '92Y55' 'ThesanR2' '92Y83'
mean 60 62 63

Plant height (cm)

  '92Y55' 'ThesanR2' '92Y83'
mean (LSD=1.63) 99.6 99.1 103.1
std. deviation 2.3 3.6 4.3

Maturity Date (days)

  '92Y55' 'ThesanR2' '92Y83'
mean 119 120 122

Click on image for larger view
Soybean: '92Y55' (center) with reference varieties 'Thesan R2' (left) and '92Y83' (right)

Click on image for larger view
Soybean: '92Y55' (bottom) with reference varieties '92Y83' (top left) and 'Thesan R2' (top right)

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