1PKLA61

Corn

Variety Description

Variety used for comparison: 'PH25VF'

Summary: For the plants of ‘1PKLA61' silk emergence occurs late in the season whereas that of ‘PH25VF' occurs mid-season. Including the tassel, the plants of ‘1PKLA61' are shorter than those of ‘PH25VF'. The brace roots of ‘1PKLA61' have a weak intensity of anthocyanin colouration whereas those of ‘PH25VF' have a medium intensity of anthocyanin colouration. The main axis above the lowest lateral branch on the tassel of ‘1PKLA61' is long whereas that of ‘PH25VF' is short. The main axis above the highest lateral branch on the tassel of ‘1PKLA61' is long whereas that of ‘PH25VF' is a medium length. The ear of ‘1PKLA61' is shorter than that of ‘PH25VF'. The kernel of ‘1PKLA61' is intermediate type whereas that of ‘PH25VF' is flint-like type. The glumes of the cob of ‘1PKLA61' have a strong intensity of colouration whereas those of ‘PH25VF' have a medium intensity of anthocyanin colouration.

Description:

PLANT: inbred yellow variety, very small ratio of height of insertion of peduncle of upper ear to plant height, anthesis occurs late in season, silk emergence occurs 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: few number of primary lateral branches, medium density of spikelets on middle third of main branch, long main axis above lowest lateral branch, long main axis above highest lateral branch
LATERAL BRANCHES: slightly recurved, small angle with main axis, short
GLUME: absent or very weak intensity of anthocyanin colouration at base, weak intensity of anthocyanin colouration excluding the base
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH OF TASSEL): weak intensity of anthocyanin colouration

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

Origin & Breeding History: ‘1PKLA61' originated from a cross conducted in 2014 by Pioneer Hi-Bred International, Inc. in Ille-et-Vilaine, Brittany, France between two proprietary inbred lines. The resulting F1 plants were self pollinated with subsequent ear selections made based on genetic analysis predicting disease resistance and agronomic performance. The F2 generation was backcrossed and then selfed. and advanced from the BC1F1 through to the BC1F5 generation with ear-to-row pedigree selections. ‘1PKLA61' was identified at the BC1F5 generation in 2017 in Woodstock, Ontario, Canada 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 BC1F5 generation in 2017.

Tests & Trials: The comparative trial for ‘1PKLA61' 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 202400336, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for '1PKLA61' with reference variety 'PH25VF'

Plant height (including tassel) (cm)

Ear length (cm)

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Corn: '1PKLA61'

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Corn: Reference variety 'PH25VF'

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Corn: '1PKLA61' (top) with reference variety 'PH25VF' (bottom)