1PWYJ10

Corn

Variety Description

Variety used for comparison: 'PH24DJ'

Summary: The ratio of height of insertion of the peduncle of the upper ear to the plant height for ‘1PWYJ10' is large whereas that of ‘PH24DJ' is very large. The brace roots of ‘1PWYJ10' have a weak intensity of anthocyanin colouration whereas those of ‘PH24DJ' have an absent or very weak intensity of anthocyanin colouration. The leaf blade of ‘1PWYJ10' is slightly recurved whereas that of ‘PH24DJ' is moderately recurved. The tassel of ‘1PWYJ10' has a medium number of primary lateral branches whereas that of ‘PH24DJ' has few primary lateral branches. The lateral branches of ‘1PWYJ10' are a medium length and moderately recurved whereas those of ‘PH24DJ' are short and straight. The main axis above the lowest lateral branch of ‘1PWYJ10' is a medium length whereas that of ‘PH24DJ' is very short. The tassel of ‘1PWYJ10' has a medium density of spikelets whereas those of ‘PH24DJ' has moderately sparse spikelets. The husks on the ear of ‘1PWYJ10' are long (extend one third the length of the ear above the tip) whereas those of ‘PH24DJ' are a medium length (extend one quarter the length of the ear above the tip). The ear of ‘1PWYJ10' is cylindrical with very many rows of grain whereas that of ‘PH24DJ' is conico-cylindrical with a medium number of rows of grain.

Description:

PLANT: inbred yellow variety, large ratio of height of insertion of peduncle of upper ear to plant height, anthesis occurs very late in season, silk emergence occurs very late 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): intermediate degree of undulation of margin, very small angle with stem, slightly recurved

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

EAR: weak intensity of anthocyanin colouration of silks, long husk (extends one third length of ear above tip), cylindrical shape, very many rows of grain, strong intensity of anthocyanin colouration on glumes of cob
KERNEL: dent-like type, yellow on top, yellow orange on dorsal side

Origin & Breeding History: ‘1PWYJ10' originated from a cross conducted in 2015 by Pioneer Hi-Bred International, Inc. in Janesville, Wisconsin, USA between two proprietary inbred lines. The F1 generation was backcrossed twice, followed by selfing and ear-to-row pedigree selections from the BC3F1 through the BC3F3 generations. ‘1PWYJ10' was identified at the BC1F3 generation in Janesville, Wisconsin, USA based on its tassel size, pollen production, germination ability, stalk lodging resistance, late season plant health, performance in hybrid combinations, grain quality, as well as disease and insect resistance. Breeder seed was established at the BC1F3 generation in 2017.

Tests & Trials: The comparative trial for ‘1PWYJ10' 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 202400342, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

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Corn: '1PWYJ10'

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Corn: Reference variety 'PH24DJ'

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Corn: '1PWYJ10' (top) with reference variety 'PH24DJ' (bottom)