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Denomination: '90Y51'
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: Nadia Krasheninnik, Pioneer Hi-Bred International, Inc., Moorhead, 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: 2012-01-26
Application Number: 12-7481
Grant of Rights Date: 2015-09-29
Certificate Number: 5122
Date rights surrendered: 2016-09-29

Variety Description

Varieties used for comparison: 'PS0753R2' and '90M60'

Summary: When 50 percent of the pods are ripe, the plants of '90Y51’ are shorter than those of 'PS0753R2’. The seed shape of '90Y51’ is spherical rounded whereas it is spherical flattened for 'PS0753R2’. '90Y51’ has a higher seed weight (in grams per 100 mature seed) than 'PS0753R2’. '90Y51’ matures earlier than 'PS0753R2’. '90Y51' is resistant to race 4 of Phytophthora root rot (Phytophthora megasperma f. sp. glycinea) whereas '90M60' is susceptible.


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

HYPOCOTYL: strong intensity of anthocyanin colouration

LEAF: medium green colour, pointed ovate lateral leaflet

FLOWER: violet

POD: brown
SEED: spherical rounded shape, dull lustre, yellow ground colour of testa, 19.3 grams per 100 seed at 13 % moisture
HILUM: dark brown, medium to large, normal abscission layer

AGRONOMICS: 2650 heat unit rating

DISEASE REACTIONS: resistant to Phytophthora root rot (Phytophthora megasperma f. sp. glycinea, races 4, 5 and 7)

QUALITY CHARACTERISTICS: 40.9 % protein, 22.3 % oil

Origin & Breeding History: '90Y51’ (experimental designations 'XB04Q11', 'PH11004') is the result of a cross made in 2004 between 'YB08N05’ and '90M60’ in Hawaii, USA. The modified single seed descent method and pedigree method were used to develop the variety. The F1-F2 generations were grown in Puerto Rico while the F3 generation was grown in Chile. The F4 generation onward were grown in Minnesota, USA and advancement was based on yield for single plants and progeny rows. Single plant purification occurred in 2008 in Chile. Wide area testing continued from 2009-2011 in the USA and Canada. Selection criteria included yield, maturity and resistance to Roundup branded herbicides and Phytophthora rot (Phytophthora megasperma f. sp. glycinea).

Tests & Trials: The comparative trial for '90Y51’ was conducted in Goderich (Clinton), 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 20 measurements for '90Y51' and 30 measurements for the reference varieties. Differences were significant at the 5% probability level for plant height based on paired Student's t-tests and for seed weight based on LSD values. Results were supported by the official technical examination report 201100210, purchased from the Plant Variety Protection Office, Beltsville, Maryland, USA.

Comparison tables for '90Y51' with reference varieties 'PS0753R2' and '90M60'

Plant height (cm)

  '90Y51' 'PS0753R2' '90M60'
mean 48.8 55.6 50.3
std. deviation 6.5 6.3 6.5

Maturity date (days)

  '90Y51' 'PS0753R2' '90M60'
mean 113 115 114

Seed weight (grams per 100 mature seed measured at 13 % moisture)

  '90Y51' 'PS0753R2' '90M60'
mean (LSD=0.63) 19.3 16.9 19.7

Click on image for larger view
Soybean: '90Y51' (center) with reference varieties 'PS0753R2' (left) and '90M60' (right)

Click on image for larger view
Soybean: '90Y51' (bottom) with reference varieties 'PS0753R2' (top left) and '90M60' (top right)

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