PH4DPN

Corn

Variety Description

Variety used for comparison: 'PHJC0'

Summary: Anthesis for ‘PH4DPN' occurs very early whereas that for ‘PHJC0' occurs early. The plants of ‘PH4DPN' are shorter than those of ‘PHJC0'. The intensity of anthocyanin colouration at the base of the glume of the tassel of ‘PH4DPN' is absent or very weak whereas that of ‘PHJC0' is medium. The ears of ‘PH4DPN' have long wings present on a medium precentage of plants whereas the ears of ‘PHJC0' have short wings present on a low percentage of plants.

Description:

PLANT: inbred yellow variety, medium ratio of height of insertion of peduncle of upper ear to plant height, anthesis occurs very early in season, silk emergence occurs early in season

STEM: absent or very slight degree of zig-zag, medium intensity of anthocyanin colouration on brace roots

LEAF BLADE (JUST ABOVE UPPER EAR): absent or very weak degree of undulation of margin, very small angle with stem, slightly recurved

TASSEL: medium number of primary lateral branches, moderately dense spikelets on middle third of main branch, medium length main axis above lowest lateral branch and highest lateral branch
LATERAL BRANCHES: slightly recurved, very small angle with main axis, short
GLUME: absent or very weak intensity of anthocyanin colouration at base, absent or very weak intensity of anthocyanin colouration at apex and middle
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH OF TASSEL): medium intensity of anthocyanin colouration

EAR: medium intensity of anthocyanin colouration of silks, conico-cylindrical shape, many rows of grain, strong intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a medium percentage of plants, medium length
KERNEL: dent-like type, yellow on top, yellow orange on dorsal side

TILLERING: absent

Origin & Breeding History: ‘PH4DPN' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. The variety resulted from a cross between two inbred lines, designated ‘PHJC0' and ‘PH1M7A', conducted in Woodstock, Ontario in 2009. The F2 generation underwent a haploidization process with subsequent chromosome doubling and selfing. Resulting DH1 lines were self pollinated and harvested in bulk. From 2009 to 2014, the DH2 to DH4 lines were self pollinated with subsequent ear selections, respectively. ‘PH4DPN' was selected in 2015 based on tassel size, pollen production, germination ability, stalk lodging resistance, late season plant health, yield in hybrid combination, grain quality, as well as disease and insect resistance. Breeder seed was established at the DH5 in 2015.

Tests & Trials: The comparative trials for 'PH4DPN' were conducted in Coteau-du-Lac, Quebec during the 2021 and 2022 growing seasons. The trials were planted in a RCB design with 3 replicates. Each replicate consisted of one 3 metre long row with 76 cm between the rows. With approximately 20 plants per row, there was a total 60 plants per variety. Measured characteristics were based on a minimum of 30 measurements per variety. Mean differences were significant at the 5% confidence probability level based on a paired Student's T-tests.

Comparison table for 'PH4DPN' with reference variety 'PHJC0'

Plant height (including tassel) (metres)

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Corn: 'PH4DPN'

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Corn: Reference variety 'PHJC0'

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Corn: 'PH4DPN' (top) with reference variety 'PHJC0' (bottom)