PH490C

Corn

Variety Description

Variety used for comparison: 'PHENE'

Summary: The plants of ‘PH490C' are shorter than those of ‘PHENE'. The leaf blade of ‘PH490C' is wider than that of ‘PHENE'. The angle between the main axis and lateral branches on the tassel of ‘PH490C' is small whereas that of ‘PHENE' is very small. The silks of ‘PH490C' have absent or very weak intensity of anthocyanin colouration whereas those of ‘PHENE' have a weak intensity of anthocyanin colouration. Including the kernels, the ear of ‘PH490C' has a smaller diameter than that of ‘PHENE'. The glumes on the cob of ‘PH490C' have a strong intensity of anthocyanin colouration whereas those of ‘PHENE' have a medium intensity of anthocyanin colouration.

Description:

PLANT: inbred yellow variety, very large ratio of height of insertion of peduncle of upper ear to plant height, anthesis and silk emergence occurs 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): 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 main axis above lowest lateral branch, short 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 at apex and middle
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH OF TASSEL): medium intensity of anthocyanin colouration

EAR: absent or very weak intensity of anthocyanin colouration of silks, conico-cylindrical shape, very many rows of grain, strong intensity of anthocyanin colouration on glumes of cob
KERNEL: dent-like type, yellow on top, red orange on dorsal side

TILLERING: absent

Origin & Breeding History: ‘PH490C' 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 ‘PH1MJC' and ‘PH1MJ5', conducted in St. Polycarpe, Quebec in 2009. The F1 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. ‘PH490C' was selected in 2014 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 trial for 'PH490C' was conducted in Coteau-du-Lac, Quebec during the 2022 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 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 202100339, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH490C' with reference variety 'PHENE'

Plant height (including tassel) (metres)

Leaf blade width (cm)

Ear diameter (including kernels) (cm)

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Corn: 'PH490C'

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Corn: Reference variety 'PHENE'

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Corn: 'PH490C' (top) with reference variety 'PHENE' (bottom)