1PKEQ94

Corn

Variety Description

Variety used for comparison: 'PH1W4Z'

Summary: For the plants of ‘1PKEQ94' silk emergence occurs very late in the season whereas for ‘PH1W4Z' it occurs late in the season. Including the tassel, the plants of ‘1PKEQ94' are shorter than those of ‘PH1W4Z'. The tassel of ‘1PKEQ94' has few primary lateral branches whereas that of ‘PH1W4Z' has a medium number of primary lateral branches. The lateral branch of ‘1PKEQ94' is a medium length whereas that of ‘PH1W4Z' is long. The husks on the ear of ‘1PKEQ94' are a medium length (extend one quarter the length of the ear above the tip) whereas those of ‘PH1W4Z' are short (level with the tip of ear). The silks on the ear of ‘1PKEQ94' have a medium intensity of anthocyanin colouration whereas those of ‘PH1W4Z' have a weak intensity of anthocyanin colouration. The kernel of ‘1PKEQ94' is flint-like type whereas that of ‘PH1W4Z' is intermediate type.

Description:

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

STEM: absent or very slight degree of zig-zag, strong 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, straight

TASSEL: few primary lateral branches, moderately sparse spikelets on middle third of main branch, very short main axis above lowest lateral branch, very short main axis above highest lateral branch
LATERAL BRANCHES: straight, small angle with main axis, medium length
GLUME: absent or very weak intensity of anthocyanin colouration at base, very weak to weak intensity of anthocyanin colouration excluding the base
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH OF TASSEL): weak intensity of anthocyanin colouration

EAR: medium intensity of anthocyanin colouration of silks, medium length husk (extends one quarter length of ear above tip), cylindrical shape, few rows of grain, absent or very weak intensity of anthocyanin colouration on glumes of cob
KERNEL: flint-like type, yellow on top, orange on dorsal side

Origin & Breeding History: ‘1PKEQ94' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. The variety resulted from a cross between two proprietary inbreds, conducted in Puerto Vallarta, Mexico in 2011. The F2 generation underwent haploidization, followed by chromosome doubling. Resulting DH1 lines were self pollinated and harvested in bulk for advancement and observations in Puerto Vallarta, Mexico; Eau Claire, Wisconsin, USA; Oahu, Hawaii, USA and Woodstock, Ontario, Canada. ‘1PKEQ94' was selected in 2017 in Woodstock, Ontario, Canada 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 F2DH in 2017.

Tests & Trials: The comparative trial for ‘1PKEQ94' was conducted in Coteau-du-Lac, Quebec during the 2024 growing season. The trial was 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 of 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. Results were supported by the official technical examination report number 202400332, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison table for '1PKEQ94' with reference variety 'PH1W4Z'

Plant height (including tassel) (cm)

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Corn: '1PKEQ94'

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Corn: Reference variety 'PH1W4Z'

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Corn: '1PKEQ94' (top) with reference variety 'PH1W4Z' (bottom)