PH4D62

Corn

Variety Description

Variety used for comparison: 'PH18GY'

Summary: The plants of ‘PH4D62' are shorter than those of ‘PH18GY'. The tassel of ‘PH4D62' has few primary lateral branches whereas that of ‘PH18GY' has a medium number of primary lateral branches. The silks of ‘PH4D62' have a strong intensity of anthocyanin colouration whereas those of ‘PH18GY' have a weak intensity. The glumes of the cob of ‘PH4D62' have a very strong intensity of anthocyanin colouration whereas those of ‘PH18GY' have a medium intensity of anthocyanin colouration.

Description:

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

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

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

TASSEL: few primary lateral branches, medium density of spikelets on middle third of main branch, short main axis above lowest lateral branch, short main axis above highest lateral branch
LATERAL BRANCHES: straight, small angle with main axis, medium length
GLUME: medium intensity of anthocyanin colouration at base, medium intensity of anthocyanin colouration at apex and middle
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH OF TASSEL): weak intensity of anthocyanin colouration

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

TILLERING: present on a low percentage of plants

Origin & Breeding History: ‘PH4D62' originated from a cross conducted by Pioneer Hi-Bred International, Inc. in 2010 between the proprietary inbred lines ‘PH26CK' and ‘PH18GY' in Puerto Vallarta, Mexico. The F1 plants were self pollinated with resulting ear selections based on genetic analysis predicting disease and insect resistance as well as agronomic preformance. Further selfing and ear to row pedigree selections were conducted from the F2 to F10 generation. ‘PH4D62' was identified at the F7 generation in 2015 with breeder seed being established at the F8 generation in 2015.

Tests & Trials: The comparative trials for 'PH4D62' 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 'PH4D62' with reference variety 'PH18GY'

Plant height (including tassel) (metres)

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Corn: 'PH4D62'

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Corn: Reference variety 'PH18GY'

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Corn: 'PH4D62' (top) with reference variety 'PH18GY' (bottom)