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Denomination: 'D4923560'
Previously Proposed Denomination: '29-52R'
Botanical Name: Glycine max
Applicant/Holder: Monsanto Canada Inc.
5192 Jones Baseline
R.R. # 4
Guelph, Ontario
N1H 6J1
Breeder: Alejandro Hernandez, Monsanto Canada Inc., Guelph, Ontario
Application Date: 2007-04-05
Application Number: 07-5850
Date Withdrawn: 2010-08-17

Variety Description

Variety used for comparison: 'AG1901'

Summary: 'D4923560' has a shorter plant height than 'AG1901'. The seed shape of 'D4923560' is spherical rounded whereas it is spherical flattened in 'AG1901'. 'D4923560' has a heavier 100 seed weight than 'AG1901'. The plant maturity of 'D4923560' is earlier than 'AG1901'.


PLANT: indeterminate growth type, erect to semi-erect growth habit, tawny coloured hairs on middle third of stem, weak anthocyanin colouration of the hypocotyl

LEAF: lateral leaflet rounded ovate shape

FLOWER: purple

POD: brown
SEED: spherical rounded shape, very small size, dull seed coat lustre, yellow testa, black hilum

DISEASE RESISTANCE: resistant to Phytophthora rot (Phytopthora megasperma f. sp. glycinea, races 1-11, 13-15, 17-18, 21-24, 26, 27, 36, 37, 38)

HERBICIDE RESISTANCE: tolerant to glyphosate

Origin & Breeding History: 'D4923560' (previously known as 29-52R) is the result of a cross made in 2001 between AG1602 and AI2465/AG2101 at Redwood Falls, Minnesota. The F1 and F2 populations were grown at Kehi, Hawaii and advanced using modified single seed descent. The F3 population was grown in bulk at Redwood Falls, Minnesota and advanced using modified single seed descent. The F3 derived F4's were grown at Redwood Falls, Minnesota in progeny rows and the variety '29-52R' was selected based on the agronomic characteristics, including, but not limited to, general plant health, lodging, early emergence, and general disease resistance.

Tests & Trials: Tests were conducted during the summers of 2007 and 2008 in Guelph, Ontario. There were two replicates arranged in a randomized complete block design where first repetition in entry order was used. Each plot consisted of 216 seeds planted in two rows. Rows were spaced 30 inches apart and were twelve feet in length.

Comparison tables for 'D4923560' with reference variety 'AG1901'

Days to flowering

  'D4923560' 'AG1901'
mean 42 44

Plant height (cm)

  'D4923560' 'AG1901'
mean 2007 83.82 93.98
std. deviation 2.4246 2.2780
mean 2008 83.82 93.98
std. deviation 2.5618 1.9731

Seed weight (grams/100 seed)

  'D4923560' 'AG1901'
mean 18.2 14.3

Days to maturity

  'D4923560' 'AG1901'
mean 125 128

Click on image for larger view
Soybean: 'D4923560' (left) with reference variety 'AG1901' (right)

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