|Botanical Name:||Glycine max|
Pioneer Hi-Bred International, Inc.
8305 NW 62nd Avenue
P.O. Box 7060
United States of America
John Van Herk, Pioneer Hi-Bred Production LP, Woodstock, Ontario
|Agent in Canada:||
Pioneer Hi-Bred Production Co.
24th Floor, 215 2nd Street SW
|Grant of Rights Date:||2015-11-18|
|Date rights surrendered:||2019-11-18|
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
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)
Plant height (cm)
Maturity Date (days)
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)
- Date modified: